diff options
Diffstat (limited to 'trunk/src/emu/cpu/s2650/s2650.c')
-rw-r--r-- | trunk/src/emu/cpu/s2650/s2650.c | 1647 |
1 files changed, 1647 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/s2650/s2650.c b/trunk/src/emu/cpu/s2650/s2650.c new file mode 100644 index 00000000000..8d8757d1a0c --- /dev/null +++ b/trunk/src/emu/cpu/s2650/s2650.c @@ -0,0 +1,1647 @@ +/************************************************************************* + * + * Portable Signetics 2650 cpu emulation + * + * Written by Juergen Buchmueller for use with MAME + * + * Version 1.2 + * - changed to clock cycle counts from machine cycles + * - replaced cycle table with inline code (M_RET conditional case) + * - removed wrong distinct add/sub CC and OVF handling + * - cosmetics, readability + * + *************************************************************************/ + +#include "emu.h" +#include "debugger.h" +#include "s2650.h" +#include "s2650cpu.h" + +/* define this to have some interrupt information logged */ +#define VERBOSE 0 + +#define LOG(x) do { if (VERBOSE) logerror x; } while (0) + +/* define this to expand all EA calculations inline */ +#define INLINE_EA 1 + +typedef struct _s2650_regs s2650_regs; +struct _s2650_regs { + UINT16 ppc; /* previous program counter (page + iar) */ + UINT16 page; /* 8K page select register (A14..A13) */ + UINT16 iar; /* instruction address register (A12..A0) */ + UINT16 ea; /* effective address (A14..A0) */ + UINT8 psl; /* processor status lower */ + UINT8 psu; /* processor status upper */ + UINT8 r; /* absolute addressing dst/src register */ + UINT8 reg[7]; /* 7 general purpose registers */ + UINT8 halt; /* 1 if cpu is halted */ + UINT8 ir; /* instruction register */ + UINT16 ras[8]; /* 8 return address stack entries */ + UINT8 irq_state; + + int icount; + device_irq_acknowledge_callback irq_callback; + legacy_cpu_device *device; + address_space *program; + direct_read_data *direct; + address_space *io; +}; + +INLINE s2650_regs *get_safe_token(device_t *device) +{ + assert(device != NULL); + assert(device->type() == S2650); + return (s2650_regs *)downcast<legacy_cpu_device *>(device)->token(); +} + +/* condition code changes for a byte */ +static const UINT8 ccc[0x200] = { + 0x00,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, + 0x04,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84, + 0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84 +}; + +/*************************************************************** + * handy table to build PC relative offsets + * from HR (holding register) + ***************************************************************/ +static const int S2650_relative[0x100] = +{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + -64,-63,-62,-61,-60,-59,-58,-57,-56,-55,-54,-53,-52,-51,-50,-49, + -48,-47,-46,-45,-44,-43,-42,-41,-40,-39,-38,-37,-36,-35,-34,-33, + -32,-31,-30,-29,-28,-27,-26,-25,-24,-23,-22,-21,-20,-19,-18,-17, + -16,-15,-14,-13,-12,-11,-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + -64,-63,-62,-61,-60,-59,-58,-57,-56,-55,-54,-53,-52,-51,-50,-49, + -48,-47,-46,-45,-44,-43,-42,-41,-40,-39,-38,-37,-36,-35,-34,-33, + -32,-31,-30,-29,-28,-27,-26,-25,-24,-23,-22,-21,-20,-19,-18,-17, + -16,-15,-14,-13,-12,-11,-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, +}; + + +/*************************************************************** + * RDMEM + * read memory byte from addr + ***************************************************************/ +#define RDMEM(addr) s2650c->program->read_byte(addr) + +static void s2650_set_sense(s2650_regs *s2650c, int state); + +INLINE void set_psu(s2650_regs *s2650c, UINT8 new_val) +{ + UINT8 old = s2650c->psu; + + s2650c->psu = new_val; + if ((new_val ^ old) & FO) + s2650c->io->write_byte(S2650_FO_PORT, (new_val & FO) ? 1 : 0); +} + +INLINE UINT8 get_sp(s2650_regs *s2650c) +{ + return (s2650c->psu & SP); +} + +INLINE void set_sp(s2650_regs *s2650c, UINT8 new_sp) +{ + s2650c->psu = (s2650c->psu & ~SP) | (new_sp & SP); +} + +INLINE int check_irq_line(s2650_regs *s2650c) +{ + int cycles = 0; + + if (s2650c->irq_state != CLEAR_LINE) + { + if( (s2650c->psu & II) == 0 ) + { + int vector; + if (s2650c->halt) + { + s2650c->halt = 0; + s2650c->iar = (s2650c->iar + 1) & PMSK; + } + vector = (*s2650c->irq_callback)(s2650c->device, 0) & 0xff; + /* build effective address within first 8K page */ + s2650c->ea = S2650_relative[vector] & PMSK; + if (vector & 0x80) /* indirect bit set ? */ + { + int addr = s2650c->ea; + cycles += 6; + /* build indirect 32K address */ + s2650c->ea = RDMEM(addr) << 8; + if (!(++addr & PMSK)) addr -= PLEN; + s2650c->ea = (s2650c->ea + RDMEM(addr)) & AMSK; + } + LOG(("S2650 interrupt to $%04x\n", s2650c->ea)); + set_sp(s2650c, get_sp(s2650c) + 1); + set_psu(s2650c, s2650c->psu | II); + s2650c->ras[get_sp(s2650c)] = s2650c->page + s2650c->iar; + s2650c->page = s2650c->ea & PAGE; + s2650c->iar = s2650c->ea & PMSK; + } + } + return cycles; +} + +/*************************************************************** + * + * set condition code (zero,plus,minus) from result + ***************************************************************/ +#define SET_CC(result) \ + s2650c->psl = (s2650c->psl & ~CC) | ccc[result] + +/*************************************************************** + * + * set condition code (zero,plus,minus) and overflow + ***************************************************************/ +#define SET_CC_OVF(result,value) \ + s2650c->psl = (s2650c->psl & ~(OVF+CC)) | \ + ccc[result + (((value) & 0x80) << 1)] + +#define SET_CC_OVF_ADD(result,value1,value2) SET_CC_OVF(result,~((value1) ^ (value2)) & ((value1) ^ (result))) +#define SET_CC_OVF_SUB(result,value1,value2) SET_CC_OVF(result,~((value1) ^ (value2)) & ((value1) ^ (result))) + +/*************************************************************** + * ROP + * read next opcode + ***************************************************************/ +INLINE UINT8 ROP(s2650_regs *s2650c) +{ + UINT8 result = s2650c->direct->read_decrypted_byte(s2650c->page + s2650c->iar); + s2650c->iar = (s2650c->iar + 1) & PMSK; + return result; +} + +/*************************************************************** + * ARG + * read next opcode argument + ***************************************************************/ +INLINE UINT8 ARG(s2650_regs *s2650c) +{ + UINT8 result = s2650c->direct->read_raw_byte(s2650c->page + s2650c->iar); + s2650c->iar = (s2650c->iar + 1) & PMSK; + return result; +} + +/*************************************************************** + * _REL_EA + * build effective address with relative addressing + ***************************************************************/ +#define _REL_EA(page) \ +{ \ + UINT8 hr = ARG(s2650c); /* get 'holding register' */ \ + /* build effective address within current 8K page */ \ + s2650c->ea = page + ((s2650c->iar + S2650_relative[hr]) & PMSK); \ + if (hr & 0x80) { /* indirect bit set ? */ \ + int addr = s2650c->ea; \ + s2650c->icount -= 6; \ + /* build indirect 32K address */ \ + s2650c->ea = RDMEM(addr) << 8; \ + if( (++addr & PMSK) == 0 ) addr -= PLEN; /* page wrap */\ + s2650c->ea = (s2650c->ea + RDMEM(addr)) & AMSK; \ + } \ +} + +/*************************************************************** + * _REL_ZERO + * build effective address with zero relative addressing + ***************************************************************/ +#define _REL_ZERO(page) \ +{ \ + UINT8 hr = ARG(s2650c); /* get 'holding register' */ \ + /* build effective address from 0 */ \ + s2650c->ea = (S2650_relative[hr] & PMSK); \ + if (hr & 0x80) { /* indirect bit set ? */ \ + int addr = s2650c->ea; \ + s2650c->icount -= 6; \ + /* build indirect 32K address */ \ + s2650c->ea = RDMEM(addr) << 8; \ + if( (++addr & PMSK) == 0 ) addr -= PLEN; /* page wrap */\ + s2650c->ea = (s2650c->ea + RDMEM(addr)) & AMSK; \ + } \ +} + +/*************************************************************** + * _ABS_EA + * build effective address with absolute addressing + ***************************************************************/ +#define _ABS_EA() \ +{ \ + UINT8 hr, dr; \ + hr = ARG(s2650c); /* get 'holding register' */ \ + dr = ARG(s2650c); /* get 'data bus register' */ \ + /* build effective address within current 8K page */ \ + s2650c->ea = s2650c->page + (((hr << 8) + dr) & PMSK); \ + /* indirect addressing ? */ \ + if (hr & 0x80) { \ + int addr = s2650c->ea; \ + s2650c->icount -= 6; \ + /* build indirect 32K address */ \ + /* build indirect 32K address */ \ + s2650c->ea = RDMEM(addr) << 8; \ + if( (++addr & PMSK) == 0 ) addr -= PLEN; /* page wrap */\ + s2650c->ea = (s2650c->ea + RDMEM(addr)) & AMSK; \ + } \ + /* check indexed addressing modes */ \ + switch (hr & 0x60) { \ + case 0x00: /* not indexed */ \ + break; \ + case 0x20: /* auto increment indexed */ \ + s2650c->reg[s2650c->r] += 1; \ + s2650c->ea = (s2650c->ea & PAGE)+((s2650c->ea+s2650c->reg[s2650c->r]) & PMSK); \ + s2650c->r = 0; /* absolute addressing reg is R0 */ \ + break; \ + case 0x40: /* auto decrement indexed */ \ + s2650c->reg[s2650c->r] -= 1; \ + s2650c->ea = (s2650c->ea & PAGE)+((s2650c->ea+s2650c->reg[s2650c->r]) & PMSK); \ + s2650c->r = 0; /* absolute addressing reg is R0 */ \ + break; \ + case 0x60: /* indexed */ \ + s2650c->ea = (s2650c->ea & PAGE)+((s2650c->ea+s2650c->reg[s2650c->r]) & PMSK); \ + s2650c->r = 0; /* absolute addressing reg is R0 */ \ + break; \ + } \ +} + +/*************************************************************** + * _BRA_EA + * build effective address with absolute addressing (branch) + ***************************************************************/ +#define _BRA_EA() \ +{ \ + UINT8 hr, dr; \ + hr = ARG(s2650c); /* get 'holding register' */ \ + dr = ARG(s2650c); /* get 'data bus register' */ \ + /* build address in 32K address space */ \ + s2650c->ea = ((hr << 8) + dr) & AMSK; \ + /* indirect addressing ? */ \ + if (hr & 0x80) { \ + int addr = s2650c->ea; \ + s2650c->icount -= 6; \ + /* build indirect 32K address */ \ + s2650c->ea = RDMEM(addr) << 8; \ + if( (++addr & PMSK) == 0 ) addr -= PLEN; /* page wrap */\ + s2650c->ea = (s2650c->ea + RDMEM(addr)) & AMSK; \ + } \ +} + +/*************************************************************** + * SWAP_REGS + * Swap registers r1-r3 with r4-r6 (the second set) + * This is done everytime the RS bit in PSL changes + ***************************************************************/ +#define SWAP_REGS \ +{ \ + UINT8 tmp; \ + tmp = s2650c->reg[1]; \ + s2650c->reg[1] = s2650c->reg[4]; \ + s2650c->reg[4] = tmp; \ + tmp = s2650c->reg[2]; \ + s2650c->reg[2] = s2650c->reg[5]; \ + s2650c->reg[5] = tmp; \ + tmp = s2650c->reg[3]; \ + s2650c->reg[3] = s2650c->reg[6]; \ + s2650c->reg[6] = tmp; \ +} + +/*************************************************************** + * M_BRR + * Branch relative if cond is true + ***************************************************************/ +#define M_BRR(cond) \ +{ \ + if (cond) \ + { \ + REL_EA( s2650c->page ); \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + } else s2650c->iar = (s2650c->iar + 1) & PMSK; \ +} + +/*************************************************************** + * M_ZBRR + * Branch relative to page zero + ***************************************************************/ +#define M_ZBRR() \ +{ \ + REL_ZERO( 0 ); \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ +} + +/*************************************************************** + * M_BRA + * Branch absolute if cond is true + ***************************************************************/ +#define M_BRA(cond) \ +{ \ + if( cond ) \ + { \ + BRA_EA(); \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + } else s2650c->iar = (s2650c->iar + 2) & PMSK; \ +} + +/*************************************************************** + * M_BXA + * Branch indexed absolute (EA + R3) + ***************************************************************/ +#define M_BXA() \ +{ \ + BRA_EA(); \ + s2650c->ea = (s2650c->ea + s2650c->reg[3]) & AMSK; \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ +} + +/*************************************************************** + * M_BSR + * Branch to subroutine relative if cond is true + ***************************************************************/ +#define M_BSR(cond) \ +{ \ + if( cond ) \ + { \ + REL_EA(s2650c->page); \ + set_sp(s2650c, get_sp(s2650c) + 1); \ + s2650c->ras[get_sp(s2650c)] = s2650c->page + s2650c->iar; \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + } else s2650c->iar = (s2650c->iar + 1) & PMSK; \ +} + +/*************************************************************** + * M_ZBSR + * Branch to subroutine relative to page zero + ***************************************************************/ +#define M_ZBSR() \ +{ \ + REL_ZERO(0); \ + set_sp(s2650c, get_sp(s2650c) + 1); \ + s2650c->ras[get_sp(s2650c)] = s2650c->page + s2650c->iar; \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ +} + +/*************************************************************** + * M_BSA + * Branch to subroutine absolute + ***************************************************************/ +#define M_BSA(cond) \ +{ \ + if( cond ) \ + { \ + BRA_EA(); \ + set_sp(s2650c, get_sp(s2650c) + 1); \ + s2650c->ras[get_sp(s2650c)] = s2650c->page + s2650c->iar; \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + } else s2650c->iar = (s2650c->iar + 2) & PMSK; \ +} + +/*************************************************************** + * M_BSXA + * Branch to subroutine indexed absolute (EA + R3) + ***************************************************************/ +#define M_BSXA() \ +{ \ + BRA_EA(); \ + s2650c->ea = (s2650c->ea + s2650c->reg[3]) & AMSK; \ + set_sp(s2650c, get_sp(s2650c) + 1); \ + s2650c->ras[get_sp(s2650c)] = s2650c->page + s2650c->iar; \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ +} + +/*************************************************************** + * M_RET + * Return from subroutine if cond is true + ***************************************************************/ +#define M_RET(cond) \ +{ \ + if( cond ) \ + { \ + s2650c->icount -= 6; \ + s2650c->ea = s2650c->ras[get_sp(s2650c)]; \ + set_sp(s2650c, get_sp(s2650c) - 1); \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + } \ +} + +/*************************************************************** + * M_RETE + * Return from subroutine if cond is true + * and enable interrupts; afterwards check IRQ line + * state and eventually take next interrupt + ***************************************************************/ +#define M_RETE(cond) \ +{ \ + if( cond ) \ + { \ + s2650c->ea = s2650c->ras[get_sp(s2650c)]; \ + set_sp(s2650c, get_sp(s2650c) - 1); \ + s2650c->page = s2650c->ea & PAGE; \ + s2650c->iar = s2650c->ea & PMSK; \ + set_psu(s2650c, s2650c->psu & ~II); \ + s2650c->icount -= check_irq_line(s2650c); \ + } \ +} + +/*************************************************************** + * M_LOD + * Load destination with source register + ***************************************************************/ +#define M_LOD(dest,source) \ +{ \ + dest = source; \ + SET_CC(dest); \ +} + +/*************************************************************** + * M_STR + * Store source register to memory addr (CC unchanged) + ***************************************************************/ +#define M_STR(address,source) \ + s2650c->program->write_byte(address, source) + +/*************************************************************** + * M_AND + * Logical and destination with source + ***************************************************************/ +#define M_AND(dest,source) \ +{ \ + dest &= source; \ + SET_CC(dest); \ +} + +/*************************************************************** + * M_IOR + * Logical inclusive or destination with source + ***************************************************************/ +#define M_IOR(dest,source) \ +{ \ + dest |= source; \ + SET_CC(dest); \ +} + +/*************************************************************** + * M_EOR + * Logical exclusive or destination with source + ***************************************************************/ +#define M_EOR(dest,source) \ +{ \ + dest ^= source; \ + SET_CC(dest); \ +} + +/*************************************************************** + * M_ADD + * Add source to destination + * Add with carry if WC flag of PSL is set + ***************************************************************/ +#define M_ADD(dest,_source) \ +{ \ + UINT8 source = _source; \ + UINT8 before = dest; \ + /* add source; carry only if WC is set */ \ + UINT16 res = dest + source + ((s2650c->psl >> 3) & s2650c->psl & C); \ + s2650c->psl &= ~(C | OVF | IDC); \ + if(res & 0x100) s2650c->psl |= C; \ + dest = res & 0xff; \ + if( (dest & 15) < (before & 15) ) s2650c->psl |= IDC; \ + SET_CC_OVF_ADD(dest,before,source); \ +} + +/*************************************************************** + * M_SUB + * Subtract source from destination + * Subtract with borrow if WC flag of PSL is set + ***************************************************************/ +#define M_SUB(dest,_source) \ +{ \ + UINT8 source = _source; \ + UINT8 before = dest; \ + /* subtract source; borrow only if WC is set */ \ + UINT16 res = dest - source - ((s2650c->psl >> 3) & (s2650c->psl ^ C) & C); \ + s2650c->psl &= ~(C | OVF | IDC); \ + if((res & 0x100)==0) s2650c->psl |= C; \ + dest = res & 0xff; \ + if( (dest & 15) <= (before & 15) ) s2650c->psl |= IDC; \ + SET_CC_OVF_SUB(dest,before,source); \ +} + +/*************************************************************** + * M_COM + * Compare register against value. If COM of PSL is set, + * use unsigned, else signed comparison + ***************************************************************/ +#define M_COM(reg,val) \ +{ \ + int d; \ + s2650c->psl &= ~CC; \ + if (s2650c->psl & COM) d = (UINT8)reg - (UINT8)val; \ + else d = (INT8)reg - (INT8)val; \ + if( d < 0 ) s2650c->psl |= 0x80; \ + else \ + if( d > 0 ) s2650c->psl |= 0x40; \ +} + +/*************************************************************** + * M_DAR + * Decimal adjust register + ***************************************************************/ +#define M_DAR(dest) \ +{ \ + if ((s2650c->psl & C) == 0) dest += 0xA0; \ + if ((s2650c->psl & IDC) == 0) dest = (dest & 0xF0) | ((dest + 0x0A) & 0x0F);\ +} + +/*************************************************************** + * M_RRL + * Rotate register left; If WC of PSL is set, rotate + * through carry, else rotate circular + ***************************************************************/ +#define M_RRL(dest) \ +{ \ + UINT8 before = dest; \ + if( s2650c->psl & WC ) \ + { \ + UINT8 c = s2650c->psl & C; \ + s2650c->psl &= ~(C + IDC); \ + dest = (before << 1) | c; \ + s2650c->psl |= (before >> 7) + (dest & IDC); \ + } \ + else \ + { \ + dest = (before << 1) | (before >> 7); \ + } \ + SET_CC(dest); \ + s2650c->psl = (s2650c->psl & ~OVF) | (((dest ^ before) >> 5) & OVF); \ +} + +/*************************************************************** + * M_RRR + * Rotate register right; If WC of PSL is set, rotate + * through carry, else rotate circular + ***************************************************************/ +#define M_RRR(dest) \ +{ \ + UINT8 before = dest; \ + if (s2650c->psl & WC) \ + { \ + UINT8 c = s2650c->psl & C; \ + s2650c->psl &= ~(C + IDC); \ + dest = (before >> 1) | (c << 7); \ + s2650c->psl |= (before & C) + (dest & IDC); \ + } else dest = (before >> 1) | (before << 7); \ + SET_CC(dest); \ + s2650c->psl = (s2650c->psl & ~OVF) | (((dest ^ before) >> 5) & OVF); \ +} + +// bxd() not necessary + +/*************************************************************** + * M_SPSU + * Store processor status upper (PSU) to register R0 + * Checks for External Sense IO port + ***************************************************************/ +#define M_SPSU() \ +{ \ + R0 = ((s2650c->psu & ~PSU34) | (s2650c->io->read_byte(S2650_SENSE_PORT) ? SI : 0)); \ + SET_CC(R0); \ +} + +/*************************************************************** + * M_SPSL + * Store processor status lower (PSL) to register R0 + ***************************************************************/ +#define M_SPSL() \ +{ \ + R0 = s2650c->psl; \ + SET_CC(R0); \ +} + +/*************************************************************** + * M_CPSU + * Clear processor status upper (PSU), selective + ***************************************************************/ +#define M_CPSU() \ +{ \ + UINT8 cpsu = ARG(s2650c); \ + set_psu(s2650c, s2650c->psu & ~cpsu); \ + s2650c->icount -= check_irq_line(s2650c); \ +} + +/*************************************************************** + * M_CPSL + * Clear processor status lower (PSL), selective + ***************************************************************/ +#define M_CPSL() \ +{ \ + UINT8 cpsl = ARG(s2650c); \ + /* select other register set now ? */ \ + if( (cpsl & RS) && (s2650c->psl & RS) ) \ + SWAP_REGS; \ + s2650c->psl = s2650c->psl & ~cpsl; \ +} + +/*************************************************************** + * M_PPSU + * Preset processor status upper (PSU), selective + * Unused bits 3 and 4 can't be set + ***************************************************************/ +#define M_PPSU() \ +{ \ + UINT8 ppsu = (ARG(s2650c) & ~PSU34) & ~SI; \ + set_psu(s2650c, s2650c->psu | ppsu); \ +} + +/*************************************************************** + * M_PPSL + * Preset processor status lower (PSL), selective + ***************************************************************/ +#define M_PPSL() \ +{ \ + UINT8 ppsl = ARG(s2650c); \ + /* select 2nd register set now ? */ \ + if ((ppsl & RS) && !(s2650c->psl & RS)) \ + SWAP_REGS; \ + s2650c->psl = s2650c->psl | ppsl; \ +} + +/*************************************************************** + * M_TPSU + * Test processor status upper (PSU) + ***************************************************************/ +#define M_TPSU() \ +{ \ + UINT8 tpsu = ARG(s2650c); \ + UINT8 rpsu = (s2650c->psu | (s2650c->io->read_byte(S2650_SENSE_PORT) ? SI : 0)); \ + s2650c->psl &= ~CC; \ + if( (rpsu & tpsu) != tpsu ) \ + s2650c->psl |= 0x80; \ +} + +/*************************************************************** + * M_TPSL + * Test processor status lower (PSL) + ***************************************************************/ +#define M_TPSL() \ +{ \ + UINT8 tpsl = ARG(s2650c); \ + if( (s2650c->psl & tpsl) != tpsl ) \ + s2650c->psl = (s2650c->psl & ~CC) | 0x80; \ + else \ + s2650c->psl &= ~CC; \ +} + +/*************************************************************** + * M_TMI + * Test under mask immediate + ***************************************************************/ +#define M_TMI(value) \ +{ \ + UINT8 tmi = ARG(s2650c); \ + s2650c->psl &= ~CC; \ + if( (value & tmi) != tmi ) \ + s2650c->psl |= 0x80; \ +} + +#if INLINE_EA +#define REL_EA(page) _REL_EA(page) +#define REL_ZERO(page) _REL_ZERO(page) +#define ABS_EA() _ABS_EA() +#define BRA_EA() _BRA_EA() +#else +static void REL_EA(unsigned short page) _REL_EA(page) +static void REL_ZERO(unsigned short page) _REL_ZERO(page) +static void ABS_EA(void) _ABS_EA() +static void BRA_EA(void) _BRA_EA() +#endif + +static CPU_INIT( s2650 ) +{ + s2650_regs *s2650c = get_safe_token(device); + + s2650c->irq_callback = irqcallback; + s2650c->device = device; + s2650c->program = device->space(AS_PROGRAM); + s2650c->direct = &s2650c->program->direct(); + s2650c->io = device->space(AS_IO); + + device->save_item(NAME(s2650c->ppc)); + device->save_item(NAME(s2650c->page)); + device->save_item(NAME(s2650c->iar)); + device->save_item(NAME(s2650c->ea)); + device->save_item(NAME(s2650c->psl)); + device->save_item(NAME(s2650c->psu)); + device->save_item(NAME(s2650c->r)); + device->save_item(NAME(s2650c->reg)); + device->save_item(NAME(s2650c->halt)); + device->save_item(NAME(s2650c->ir)); + device->save_item(NAME(s2650c->ras)); + device->save_item(NAME(s2650c->irq_state)); +} + +static CPU_RESET( s2650 ) +{ + s2650_regs *s2650c = get_safe_token(device); + + s2650c->ppc = 0; + s2650c->page = 0, + s2650c->iar = 0; + s2650c->ea = 0; + s2650c->r = 0; + s2650c->halt = 0; + s2650c->ir = 0; + memset(s2650c->reg, 0, sizeof(s2650c->reg)); + memset(s2650c->ras, 0, sizeof(s2650c->ras)); + + s2650c->device = device; + s2650c->program = device->space(AS_PROGRAM); + s2650c->direct = &s2650c->program->direct(); + s2650c->io = device->space(AS_IO); + s2650c->psl = COM | WC; + /* force write */ + s2650c->psu = 0xff; + set_psu(s2650c, 0); +} + +static CPU_EXIT( s2650 ) +{ + /* nothing to do */ +} + +static void set_irq_line(s2650_regs *s2650c, int irqline, int state) +{ + if (irqline == 1) + { + if (state == CLEAR_LINE) + s2650_set_sense(s2650c, 0); + else + s2650_set_sense(s2650c, 1); + return; + } + + s2650c->irq_state = state; +} + +static void s2650_set_flag(s2650_regs *s2650c, int state) +{ + if (state) + set_psu(s2650c, s2650c->psu | FO); + else + set_psu(s2650c, s2650c->psu & ~FO); +} + +static int s2650_get_flag(s2650_regs *s2650c) +{ + return (s2650c->psu & FO) ? 1 : 0; +} + +static void s2650_set_sense(s2650_regs *s2650c, int state) +{ + if (state) + set_psu(s2650c, s2650c->psu | SI); + else + set_psu(s2650c, s2650c->psu & ~SI); +} + +static int s2650_get_sense(s2650_regs *s2650c) +{ + /* OR'd with Input to allow for external connections */ + + return (((s2650c->psu & SI) ? 1 : 0) | ((s2650c->io->read_byte(S2650_SENSE_PORT) & SI) ? 1 : 0)); +} + +static CPU_EXECUTE( s2650 ) +{ + s2650_regs *s2650c = get_safe_token(device); + + /* check for external irqs */ + int cycles = check_irq_line(s2650c); + s2650c->icount -= cycles; + + do + { + s2650c->ppc = s2650c->page + s2650c->iar; + + debugger_instruction_hook(device, s2650c->page + s2650c->iar); + + s2650c->ir = ROP(s2650c); + s2650c->r = s2650c->ir & 3; /* register / value */ + switch (s2650c->ir) { + case 0x00: /* LODZ,0 */ + case 0x01: /* LODZ,1 */ + case 0x02: /* LODZ,2 */ + case 0x03: /* LODZ,3 */ + s2650c->icount -= 6; + M_LOD( R0, s2650c->reg[s2650c->r] ); + break; + + case 0x04: /* LODI,0 v */ + case 0x05: /* LODI,1 v */ + case 0x06: /* LODI,2 v */ + case 0x07: /* LODI,3 v */ + s2650c->icount -= 6; + M_LOD( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0x08: /* LODR,0 (*)a */ + case 0x09: /* LODR,1 (*)a */ + case 0x0a: /* LODR,2 (*)a */ + case 0x0b: /* LODR,3 (*)a */ + s2650c->icount -= 9; + REL_EA( s2650c->page ); + M_LOD( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x0c: /* LODA,0 (*)a(,X) */ + case 0x0d: /* LODA,1 (*)a(,X) */ + case 0x0e: /* LODA,2 (*)a(,X) */ + case 0x0f: /* LODA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_LOD( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x10: /* illegal */ + case 0x11: /* illegal */ + s2650c->icount -= 7; + break; + case 0x12: /* SPSU */ + s2650c->icount -= 6; + M_SPSU(); + break; + case 0x13: /* SPSL */ + s2650c->icount -= 6; + M_SPSL(); + break; + + case 0x14: /* RETC,0 (zero) */ + case 0x15: /* RETC,1 (plus) */ + case 0x16: /* RETC,2 (minus) */ + s2650c->icount -= 9; /* +2 cycles if condition is true */ + M_RET( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x17: /* RETC,3 (always) */ + s2650c->icount -= 9; /* +2 cycles if condition is true */ + M_RET( 1 ); + break; + + case 0x18: /* BCTR,0 (*)a */ + case 0x19: /* BCTR,1 (*)a */ + case 0x1a: /* BCTR,2 (*)a */ + s2650c->icount -= 9; + M_BRR( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x1b: /* BCTR,3 (*)a */ + s2650c->icount -= 9; + M_BRR( 1 ); + break; + + case 0x1c: /* BCTA,0 (*)a */ + case 0x1d: /* BCTA,1 (*)a */ + case 0x1e: /* BCTA,2 (*)a */ + s2650c->icount -= 9; + M_BRA( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x1f: /* BCTA,3 (*)a */ + s2650c->icount -= 9; + M_BRA( 1 ); + break; + + case 0x20: /* EORZ,0 */ + case 0x21: /* EORZ,1 */ + case 0x22: /* EORZ,2 */ + case 0x23: /* EORZ,3 */ + s2650c->icount -= 6; + M_EOR( R0, s2650c->reg[s2650c->r] ); + break; + + case 0x24: /* EORI,0 v */ + case 0x25: /* EORI,1 v */ + case 0x26: /* EORI,2 v */ + case 0x27: /* EORI,3 v */ + s2650c->icount -= 6; + M_EOR( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0x28: /* EORR,0 (*)a */ + case 0x29: /* EORR,1 (*)a */ + case 0x2a: /* EORR,2 (*)a */ + case 0x2b: /* EORR,3 (*)a */ + s2650c->icount -= 9; + REL_EA( s2650c->page ); + M_EOR( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x2c: /* EORA,0 (*)a(,X) */ + case 0x2d: /* EORA,1 (*)a(,X) */ + case 0x2e: /* EORA,2 (*)a(,X) */ + case 0x2f: /* EORA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_EOR( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x30: /* REDC,0 */ + case 0x31: /* REDC,1 */ + case 0x32: /* REDC,2 */ + case 0x33: /* REDC,3 */ + s2650c->icount -= 6; + s2650c->reg[s2650c->r] = s2650c->io->read_byte(S2650_CTRL_PORT); + SET_CC( s2650c->reg[s2650c->r] ); + break; + + case 0x34: /* RETE,0 */ + case 0x35: /* RETE,1 */ + case 0x36: /* RETE,2 */ + s2650c->icount -= 9; + M_RETE( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x37: /* RETE,3 */ + s2650c->icount -= 9; + M_RETE( 1 ); + break; + + case 0x38: /* BSTR,0 (*)a */ + case 0x39: /* BSTR,1 (*)a */ + case 0x3a: /* BSTR,2 (*)a */ + s2650c->icount -= 9; + M_BSR( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x3b: /* BSTR,R3 (*)a */ + s2650c->icount -= 9; + M_BSR( 1 ); + break; + + case 0x3c: /* BSTA,0 (*)a */ + case 0x3d: /* BSTA,1 (*)a */ + case 0x3e: /* BSTA,2 (*)a */ + s2650c->icount -= 9; + M_BSA( (s2650c->psl >> 6) == s2650c->r ); + break; + case 0x3f: /* BSTA,3 (*)a */ + s2650c->icount -= 9; + M_BSA( 1 ); + break; + + case 0x40: /* HALT */ + s2650c->icount -= 6; + s2650c->iar = (s2650c->iar - 1) & PMSK; + s2650c->halt = 1; + if (s2650c->icount > 0) + s2650c->icount = 0; + break; + case 0x41: /* ANDZ,1 */ + case 0x42: /* ANDZ,2 */ + case 0x43: /* ANDZ,3 */ + s2650c->icount -= 6; + M_AND( R0, s2650c->reg[s2650c->r] ); + break; + + case 0x44: /* ANDI,0 v */ + case 0x45: /* ANDI,1 v */ + case 0x46: /* ANDI,2 v */ + case 0x47: /* ANDI,3 v */ + s2650c->icount -= 6; + M_AND( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0x48: /* ANDR,0 (*)a */ + case 0x49: /* ANDR,1 (*)a */ + case 0x4a: /* ANDR,2 (*)a */ + case 0x4b: /* ANDR,3 (*)a */ + s2650c->icount -= 9; + REL_EA( s2650c->page ); + M_AND( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x4c: /* ANDA,0 (*)a(,X) */ + case 0x4d: /* ANDA,1 (*)a(,X) */ + case 0x4e: /* ANDA,2 (*)a(,X) */ + case 0x4f: /* ANDA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_AND( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x50: /* RRR,0 */ + case 0x51: /* RRR,1 */ + case 0x52: /* RRR,2 */ + case 0x53: /* RRR,3 */ + s2650c->icount -= 6; + M_RRR( s2650c->reg[s2650c->r] ); + break; + + case 0x54: /* REDE,0 v */ + case 0x55: /* REDE,1 v */ + case 0x56: /* REDE,2 v */ + case 0x57: /* REDE,3 v */ + s2650c->icount -= 9; + s2650c->reg[s2650c->r] = s2650c->io->read_byte( ARG(s2650c) ); + SET_CC(s2650c->reg[s2650c->r]); + break; + + case 0x58: /* BRNR,0 (*)a */ + case 0x59: /* BRNR,1 (*)a */ + case 0x5a: /* BRNR,2 (*)a */ + case 0x5b: /* BRNR,3 (*)a */ + s2650c->icount -= 9; + M_BRR( s2650c->reg[s2650c->r] ); + break; + + case 0x5c: /* BRNA,0 (*)a */ + case 0x5d: /* BRNA,1 (*)a */ + case 0x5e: /* BRNA,2 (*)a */ + case 0x5f: /* BRNA,3 (*)a */ + s2650c->icount -= 9; + M_BRA( s2650c->reg[s2650c->r] ); + break; + + case 0x60: /* IORZ,0 */ + case 0x61: /* IORZ,1 */ + case 0x62: /* IORZ,2 */ + case 0x63: /* IORZ,3 */ + s2650c->icount -= 6; + M_IOR( R0, s2650c->reg[s2650c->r] ); + break; + + case 0x64: /* IORI,0 v */ + case 0x65: /* IORI,1 v */ + case 0x66: /* IORI,2 v */ + case 0x67: /* IORI,3 v */ + s2650c->icount -= 6; + M_IOR( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0x68: /* IORR,0 (*)a */ + case 0x69: /* IORR,1 (*)a */ + case 0x6a: /* IORR,2 (*)a */ + case 0x6b: /* IORR,3 (*)a */ + s2650c->icount -= 9; + REL_EA( s2650c->page ); + M_IOR( s2650c->reg[s2650c-> r],RDMEM(s2650c->ea) ); + break; + + case 0x6c: /* IORA,0 (*)a(,X) */ + case 0x6d: /* IORA,1 (*)a(,X) */ + case 0x6e: /* IORA,2 (*)a(,X) */ + case 0x6f: /* IORA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_IOR( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x70: /* REDD,0 */ + case 0x71: /* REDD,1 */ + case 0x72: /* REDD,2 */ + case 0x73: /* REDD,3 */ + s2650c->icount -= 6; + s2650c->reg[s2650c->r] = s2650c->io->read_byte(S2650_DATA_PORT); + SET_CC(s2650c->reg[s2650c->r]); + break; + + case 0x74: /* CPSU */ + s2650c->icount -= 9; + M_CPSU(); + break; + case 0x75: /* CPSL */ + s2650c->icount -= 9; + M_CPSL(); + break; + case 0x76: /* PPSU */ + s2650c->icount -= 9; + M_PPSU(); + break; + case 0x77: /* PPSL */ + s2650c->icount -= 9; + M_PPSL(); + break; + + case 0x78: /* BSNR,0 (*)a */ + case 0x79: /* BSNR,1 (*)a */ + case 0x7a: /* BSNR,2 (*)a */ + case 0x7b: /* BSNR,3 (*)a */ + s2650c->icount -= 9; + M_BSR( s2650c->reg[s2650c->r] ); + break; + + case 0x7c: /* BSNA,0 (*)a */ + case 0x7d: /* BSNA,1 (*)a */ + case 0x7e: /* BSNA,2 (*)a */ + case 0x7f: /* BSNA,3 (*)a */ + s2650c->icount -= 9; + M_BSA( s2650c->reg[s2650c->r] ); + break; + + case 0x80: /* ADDZ,0 */ + case 0x81: /* ADDZ,1 */ + case 0x82: /* ADDZ,2 */ + case 0x83: /* ADDZ,3 */ + s2650c->icount -= 6; + M_ADD( R0,s2650c->reg[s2650c->r] ); + break; + + case 0x84: /* ADDI,0 v */ + case 0x85: /* ADDI,1 v */ + case 0x86: /* ADDI,2 v */ + case 0x87: /* ADDI,3 v */ + s2650c->icount -= 6; + M_ADD( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0x88: /* ADDR,0 (*)a */ + case 0x89: /* ADDR,1 (*)a */ + case 0x8a: /* ADDR,2 (*)a */ + case 0x8b: /* ADDR,3 (*)a */ + s2650c->icount -= 9; + REL_EA(s2650c->page); + M_ADD( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x8c: /* ADDA,0 (*)a(,X) */ + case 0x8d: /* ADDA,1 (*)a(,X) */ + case 0x8e: /* ADDA,2 (*)a(,X) */ + case 0x8f: /* ADDA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_ADD( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0x90: /* illegal */ + case 0x91: /* illegal */ + s2650c->icount -= 7; + break; + case 0x92: /* LPSU */ + s2650c->icount -= 6; + set_psu(s2650c, (R0 & ~PSU34) & ~SI); + break; + case 0x93: /* LPSL */ + s2650c->icount -= 6; + /* change register set ? */ + if ((s2650c->psl ^ R0) & RS) + SWAP_REGS; + s2650c->psl = R0; + break; + + case 0x94: /* DAR,0 */ + case 0x95: /* DAR,1 */ + case 0x96: /* DAR,2 */ + case 0x97: /* DAR,3 */ + s2650c->icount -= 9; + M_DAR( s2650c->reg[s2650c->r] ); + break; + + case 0x98: /* BCFR,0 (*)a */ + case 0x99: /* BCFR,1 (*)a */ + case 0x9a: /* BCFR,2 (*)a */ + s2650c->icount -= 9; + M_BRR( (s2650c->psl >> 6) != s2650c->r ); + break; + case 0x9b: /* ZBRR (*)a */ + s2650c->icount -= 9; + M_ZBRR(); + break; + + case 0x9c: /* BCFA,0 (*)a */ + case 0x9d: /* BCFA,1 (*)a */ + case 0x9e: /* BCFA,2 (*)a */ + s2650c->icount -= 9; + M_BRA( (s2650c->psl >> 6) != s2650c->r ); + break; + case 0x9f: /* BXA (*)a */ + s2650c->icount -= 9; + M_BXA(); + break; + + case 0xa0: /* SUBZ,0 */ + case 0xa1: /* SUBZ,1 */ + case 0xa2: /* SUBZ,2 */ + case 0xa3: /* SUBZ,3 */ + s2650c->icount -= 6; + M_SUB( R0, s2650c->reg[s2650c->r] ); + break; + + case 0xa4: /* SUBI,0 v */ + case 0xa5: /* SUBI,1 v */ + case 0xa6: /* SUBI,2 v */ + case 0xa7: /* SUBI,3 v */ + s2650c->icount -= 6; + M_SUB( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0xa8: /* SUBR,0 (*)a */ + case 0xa9: /* SUBR,1 (*)a */ + case 0xaa: /* SUBR,2 (*)a */ + case 0xab: /* SUBR,3 (*)a */ + s2650c->icount -= 9; + REL_EA(s2650c->page); + M_SUB( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0xac: /* SUBA,0 (*)a(,X) */ + case 0xad: /* SUBA,1 (*)a(,X) */ + case 0xae: /* SUBA,2 (*)a(,X) */ + case 0xaf: /* SUBA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_SUB( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0xb0: /* WRTC,0 */ + case 0xb1: /* WRTC,1 */ + case 0xb2: /* WRTC,2 */ + case 0xb3: /* WRTC,3 */ + s2650c->icount -= 6; + s2650c->io->write_byte(S2650_CTRL_PORT,s2650c->reg[s2650c->r]); + break; + + case 0xb4: /* TPSU */ + s2650c->icount -= 9; + M_TPSU(); + break; + case 0xb5: /* TPSL */ + s2650c->icount -= 9; + M_TPSL(); + break; + case 0xb6: /* illegal */ + case 0xb7: /* illegal */ + s2650c->icount -= 7; + break; + + case 0xb8: /* BSFR,0 (*)a */ + case 0xb9: /* BSFR,1 (*)a */ + case 0xba: /* BSFR,2 (*)a */ + s2650c->icount -= 9; + M_BSR( (s2650c->psl >> 6) != s2650c->r ); + break; + case 0xbb: /* ZBSR (*)a */ + s2650c->icount -= 9; + M_ZBSR(); + break; + + case 0xbc: /* BSFA,0 (*)a */ + case 0xbd: /* BSFA,1 (*)a */ + case 0xbe: /* BSFA,2 (*)a */ + s2650c->icount -= 9; + M_BSA( (s2650c->psl >> 6) != s2650c->r ); + break; + case 0xbf: /* BSXA (*)a */ + s2650c->icount -= 9; + M_BSXA(); + break; + + case 0xc0: /* NOP */ + s2650c->icount -= 6; + break; + case 0xc1: /* STRZ,1 */ + case 0xc2: /* STRZ,2 */ + case 0xc3: /* STRZ,3 */ + s2650c->icount -= 6; + M_LOD( s2650c->reg[s2650c->r], R0 ); + break; + + case 0xc4: /* illegal */ + case 0xc5: /* illegal */ + case 0xc6: /* illegal */ + case 0xc7: /* illegal */ + s2650c->icount -= 7; + break; + + case 0xc8: /* STRR,0 (*)a */ + case 0xc9: /* STRR,1 (*)a */ + case 0xca: /* STRR,2 (*)a */ + case 0xcb: /* STRR,3 (*)a */ + s2650c->icount -= 9; + REL_EA(s2650c->page); + M_STR( s2650c->ea, s2650c->reg[s2650c->r] ); + break; + + case 0xcc: /* STRA,0 (*)a(,X) */ + case 0xcd: /* STRA,1 (*)a(,X) */ + case 0xce: /* STRA,2 (*)a(,X) */ + case 0xcf: /* STRA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_STR( s2650c->ea, s2650c->reg[s2650c->r] ); + break; + + case 0xd0: /* RRL,0 */ + case 0xd1: /* RRL,1 */ + case 0xd2: /* RRL,2 */ + case 0xd3: /* RRL,3 */ + s2650c->icount -= 6; + M_RRL( s2650c->reg[s2650c->r] ); + break; + + case 0xd4: /* WRTE,0 v */ + case 0xd5: /* WRTE,1 v */ + case 0xd6: /* WRTE,2 v */ + case 0xd7: /* WRTE,3 v */ + s2650c->icount -= 9; + s2650c->io->write_byte( ARG(s2650c), s2650c->reg[s2650c->r] ); + break; + + case 0xd8: /* BIRR,0 (*)a */ + case 0xd9: /* BIRR,1 (*)a */ + case 0xda: /* BIRR,2 (*)a */ + case 0xdb: /* BIRR,3 (*)a */ + s2650c->icount -= 9; + M_BRR( ++s2650c->reg[s2650c->r] ); + break; + + case 0xdc: /* BIRA,0 (*)a */ + case 0xdd: /* BIRA,1 (*)a */ + case 0xde: /* BIRA,2 (*)a */ + case 0xdf: /* BIRA,3 (*)a */ + s2650c->icount -= 9; + M_BRA( ++s2650c->reg[s2650c->r] ); + break; + + case 0xe0: /* COMZ,0 */ + case 0xe1: /* COMZ,1 */ + case 0xe2: /* COMZ,2 */ + case 0xe3: /* COMZ,3 */ + s2650c->icount -= 6; + M_COM( R0, s2650c->reg[s2650c->r] ); + break; + + case 0xe4: /* COMI,0 v */ + case 0xe5: /* COMI,1 v */ + case 0xe6: /* COMI,2 v */ + case 0xe7: /* COMI,3 v */ + s2650c->icount -= 6; + M_COM( s2650c->reg[s2650c->r], ARG(s2650c) ); + break; + + case 0xe8: /* COMR,0 (*)a */ + case 0xe9: /* COMR,1 (*)a */ + case 0xea: /* COMR,2 (*)a */ + case 0xeb: /* COMR,3 (*)a */ + s2650c->icount -= 9; + REL_EA(s2650c->page); + M_COM( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0xec: /* COMA,0 (*)a(,X) */ + case 0xed: /* COMA,1 (*)a(,X) */ + case 0xee: /* COMA,2 (*)a(,X) */ + case 0xef: /* COMA,3 (*)a(,X) */ + s2650c->icount -= 12; + ABS_EA(); + M_COM( s2650c->reg[s2650c->r], RDMEM(s2650c->ea) ); + break; + + case 0xf0: /* WRTD,0 */ + case 0xf1: /* WRTD,1 */ + case 0xf2: /* WRTD,2 */ + case 0xf3: /* WRTD,3 */ + s2650c->icount -= 6; + s2650c->io->write_byte(S2650_DATA_PORT, s2650c->reg[s2650c->r]); + break; + + case 0xf4: /* TMI,0 v */ + case 0xf5: /* TMI,1 v */ + case 0xf6: /* TMI,2 v */ + case 0xf7: /* TMI,3 v */ + s2650c->icount -= 9; + M_TMI( s2650c->reg[s2650c->r] ); + break; + + case 0xf8: /* BDRR,0 (*)a */ + case 0xf9: /* BDRR,1 (*)a */ + case 0xfa: /* BDRR,2 (*)a */ + case 0xfb: /* BDRR,3 (*)a */ + s2650c->icount -= 9; + M_BRR( --s2650c->reg[s2650c->r] ); + break; + + case 0xfc: /* BDRA,0 (*)a */ + case 0xfd: /* BDRA,1 (*)a */ + case 0xfe: /* BDRA,2 (*)a */ + case 0xff: /* BDRA,3 (*)a */ + s2650c->icount -= 9; + M_BRA( --s2650c->reg[s2650c->r] ); + break; + } + } while( s2650c->icount > 0 ); +} + + +/************************************************************************** + * Generic set_info + **************************************************************************/ + +static CPU_SET_INFO( s2650 ) +{ + s2650_regs *s2650c = get_safe_token(device); + + switch (state) + { + /* --- the following bits of info are set as 64-bit signed integers --- */ + case CPUINFO_INT_INPUT_STATE + 0: set_irq_line(s2650c, 0, info->i); break; + case CPUINFO_INT_INPUT_STATE + 1: set_irq_line(s2650c, 1, info->i); break; + + case CPUINFO_INT_PC: + s2650c->page = info->i & PAGE; + s2650c->iar = info->i & PMSK; + break; + + case CPUINFO_INT_REGISTER + S2650_PC: s2650c->page = info->i & PAGE; s2650c->iar = info->i & PMSK; break; + case CPUINFO_INT_SP: set_sp(s2650c, info->i); break; + case CPUINFO_INT_REGISTER + S2650_PS: s2650c->psl = info->i & 0xff; set_psu(s2650c, info->i >> 8); break; + case CPUINFO_INT_REGISTER + S2650_R0: s2650c->reg[0] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R1: s2650c->reg[1] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R2: s2650c->reg[2] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R3: s2650c->reg[3] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R1A: s2650c->reg[4] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R2A: s2650c->reg[5] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_R3A: s2650c->reg[6] = info->i; break; + case CPUINFO_INT_REGISTER + S2650_HALT: s2650c->halt = info->i; break; + case CPUINFO_INT_REGISTER + S2650_SI: s2650_set_sense(s2650c, info->i); break; + case CPUINFO_INT_REGISTER + S2650_FO: s2650_set_flag(s2650c, info->i); break; + } +} + + + +/************************************************************************** + * Generic get_info + **************************************************************************/ + +CPU_GET_INFO( s2650 ) +{ + s2650_regs *s2650c = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL; + switch (state) + { + /* --- the following bits of info are returned as 64-bit signed integers --- */ + case CPUINFO_INT_CONTEXT_SIZE: info->i = sizeof(s2650_regs); break; + case CPUINFO_INT_INPUT_LINES: info->i = 2; break; + case CPUINFO_INT_DEFAULT_IRQ_VECTOR: info->i = 0; break; + case DEVINFO_INT_ENDIANNESS: info->i = ENDIANNESS_LITTLE; break; + case CPUINFO_INT_CLOCK_MULTIPLIER: info->i = 1; break; + case CPUINFO_INT_CLOCK_DIVIDER: info->i = 1; break; + case CPUINFO_INT_MIN_INSTRUCTION_BYTES: info->i = 1; break; + case CPUINFO_INT_MAX_INSTRUCTION_BYTES: info->i = 3; break; + case CPUINFO_INT_MIN_CYCLES: info->i = 5; break; + case CPUINFO_INT_MAX_CYCLES: info->i = 13; break; + + case DEVINFO_INT_DATABUS_WIDTH + AS_PROGRAM: info->i = 8; break; + case DEVINFO_INT_ADDRBUS_WIDTH + AS_PROGRAM: info->i = 15; break; + case DEVINFO_INT_ADDRBUS_SHIFT + AS_PROGRAM: info->i = 0; break; + + case DEVINFO_INT_DATABUS_WIDTH + AS_DATA: info->i = 0; break; + case DEVINFO_INT_ADDRBUS_WIDTH + AS_DATA: info->i = 0; break; + case DEVINFO_INT_ADDRBUS_SHIFT + AS_DATA: info->i = 0; break; + + case DEVINFO_INT_DATABUS_WIDTH + AS_IO: info->i = 8; break; + case DEVINFO_INT_ADDRBUS_WIDTH + AS_IO: info->i = 9; break; + case DEVINFO_INT_ADDRBUS_SHIFT + AS_IO: info->i = 0; break; + + case CPUINFO_INT_INPUT_STATE + 0: info->i = s2650c->irq_state; break; + case CPUINFO_INT_INPUT_STATE + 1: info->i = s2650_get_sense(s2650c) ? ASSERT_LINE : CLEAR_LINE; break; + + case CPUINFO_INT_PREVIOUSPC: info->i = s2650c->ppc; break; + + case CPUINFO_INT_PC: + case CPUINFO_INT_REGISTER + S2650_PC: info->i = s2650c->page + s2650c->iar; break; + + case CPUINFO_INT_SP: info->i = get_sp(s2650c); break; + case CPUINFO_INT_REGISTER + S2650_PS: info->i = (s2650c->psu << 8) | s2650c->psl; break; + case CPUINFO_INT_REGISTER + S2650_R0: info->i = s2650c->reg[0]; break; + case CPUINFO_INT_REGISTER + S2650_R1: info->i = s2650c->reg[1]; break; + case CPUINFO_INT_REGISTER + S2650_R2: info->i = s2650c->reg[2]; break; + case CPUINFO_INT_REGISTER + S2650_R3: info->i = s2650c->reg[3]; break; + case CPUINFO_INT_REGISTER + S2650_R1A: info->i = s2650c->reg[4]; break; + case CPUINFO_INT_REGISTER + S2650_R2A: info->i = s2650c->reg[5]; break; + case CPUINFO_INT_REGISTER + S2650_R3A: info->i = s2650c->reg[6]; break; + case CPUINFO_INT_REGISTER + S2650_HALT: info->i = s2650c->halt; break; + case CPUINFO_INT_REGISTER + S2650_SI: info->i = s2650_get_sense(s2650c); break; + case CPUINFO_INT_REGISTER + S2650_FO: info->i = s2650_get_flag(s2650c); break; + + /* --- the following bits of info are returned as pointers to data or functions --- */ + case CPUINFO_FCT_SET_INFO: info->setinfo = CPU_SET_INFO_NAME(s2650); break; + case CPUINFO_FCT_INIT: info->init = CPU_INIT_NAME(s2650); break; + case CPUINFO_FCT_RESET: info->reset = CPU_RESET_NAME(s2650); break; + case CPUINFO_FCT_EXIT: info->exit = CPU_EXIT_NAME(s2650); break; + case CPUINFO_FCT_EXECUTE: info->execute = CPU_EXECUTE_NAME(s2650); break; + case CPUINFO_FCT_BURN: info->burn = NULL; break; + case CPUINFO_FCT_DISASSEMBLE: info->disassemble = CPU_DISASSEMBLE_NAME(s2650); break; + case CPUINFO_PTR_INSTRUCTION_COUNTER: info->icount = &s2650c->icount; break; + + /* --- the following bits of info are returned as NULL-terminated strings --- */ + case DEVINFO_STR_NAME: strcpy(info->s, "S2650"); break; + case DEVINFO_STR_FAMILY: strcpy(info->s, "Signetics 2650"); break; + case DEVINFO_STR_VERSION: strcpy(info->s, "1.2"); break; + case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break; + case DEVINFO_STR_CREDITS: strcpy(info->s, "Written by Juergen Buchmueller for use with MAME"); break; + + case CPUINFO_STR_FLAGS: + sprintf(info->s, "%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c", + s2650c->psu & 0x80 ? 'S':'.', + s2650c->psu & 0x40 ? 'O':'.', + s2650c->psu & 0x20 ? 'I':'.', + s2650c->psu & 0x10 ? '?':'.', + s2650c->psu & 0x08 ? '?':'.', + s2650c->psu & 0x04 ? 's':'.', + s2650c->psu & 0x02 ? 's':'.', + s2650c->psu & 0x01 ? 's':'.', + s2650c->psl & 0x80 ? 'M':'.', + s2650c->psl & 0x40 ? 'P':'.', + s2650c->psl & 0x20 ? 'H':'.', + s2650c->psl & 0x10 ? 'R':'.', + s2650c->psl & 0x08 ? 'W':'.', + s2650c->psl & 0x04 ? 'V':'.', + s2650c->psl & 0x02 ? '2':'.', + s2650c->psl & 0x01 ? 'C':'.'); + break; + + case CPUINFO_STR_REGISTER + S2650_PC: sprintf(info->s, "PC:%04X", s2650c->page + s2650c->iar); break; + case CPUINFO_STR_REGISTER + S2650_PS: sprintf(info->s, "PS:%02X%02X", s2650c->psu, s2650c->psl); break; + case CPUINFO_STR_REGISTER + S2650_R0: sprintf(info->s, "R0:%02X", s2650c->reg[0]); break; + case CPUINFO_STR_REGISTER + S2650_R1: sprintf(info->s, "R1:%02X", s2650c->reg[1]); break; + case CPUINFO_STR_REGISTER + S2650_R2: sprintf(info->s, "R2:%02X", s2650c->reg[2]); break; + case CPUINFO_STR_REGISTER + S2650_R3: sprintf(info->s, "R3:%02X", s2650c->reg[3]); break; + case CPUINFO_STR_REGISTER + S2650_R1A: sprintf(info->s, "R1':%02X", s2650c->reg[4]); break; + case CPUINFO_STR_REGISTER + S2650_R2A: sprintf(info->s, "R2':%02X", s2650c->reg[5]); break; + case CPUINFO_STR_REGISTER + S2650_R3A: sprintf(info->s, "R3':%02X", s2650c->reg[6]); break; + case CPUINFO_STR_REGISTER + S2650_HALT: sprintf(info->s, "HALT:%X", s2650c->halt); break; + case CPUINFO_STR_REGISTER + S2650_SI: sprintf(info->s, "SI:%X", (s2650c->psu & SI) ? 1 : 0); break; + case CPUINFO_STR_REGISTER + S2650_FO: sprintf(info->s, "FO:%X", (s2650c->psu & FO) ? 1 : 0); break; + } +} + +DEFINE_LEGACY_CPU_DEVICE(S2650, s2650); |