/************************************************************************* * * 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 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(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 CPUINFO_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 CPUINFO_INT_DATABUS_WIDTH + AS_PROGRAM: info->i = 8; break; case CPUINFO_INT_ADDRBUS_WIDTH + AS_PROGRAM: info->i = 15; break; case CPUINFO_INT_ADDRBUS_SHIFT + AS_PROGRAM: info->i = 0; break; case CPUINFO_INT_DATABUS_WIDTH + AS_DATA: info->i = 0; break; case CPUINFO_INT_ADDRBUS_WIDTH + AS_DATA: info->i = 0; break; case CPUINFO_INT_ADDRBUS_SHIFT + AS_DATA: info->i = 0; break; case CPUINFO_INT_DATABUS_WIDTH + AS_IO: info->i = 8; break; case CPUINFO_INT_ADDRBUS_WIDTH + AS_IO: info->i = 9; break; case CPUINFO_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 CPUINFO_STR_NAME: strcpy(info->s, "S2650"); break; case CPUINFO_STR_FAMILY: strcpy(info->s, "Signetics 2650"); break; case CPUINFO_STR_VERSION: strcpy(info->s, "1.2"); break; case CPUINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break; case CPUINFO_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);