diff options
Diffstat (limited to 'src/emu/cpu/hphybrid/hphybrid.c')
-rw-r--r-- | src/emu/cpu/hphybrid/hphybrid.c | 1504 |
1 files changed, 785 insertions, 719 deletions
diff --git a/src/emu/cpu/hphybrid/hphybrid.c b/src/emu/cpu/hphybrid/hphybrid.c index bef8da6ddb2..8a50c78368d 100644 --- a/src/emu/cpu/hphybrid/hphybrid.c +++ b/src/emu/cpu/hphybrid/hphybrid.c @@ -1,23 +1,26 @@ // license:BSD-3-Clause // copyright-holders:F. Ulivi +// +// TODO: +// - DMA #include "emu.h" #include "debugger.h" #include "hphybrid.h" enum { - HPHYBRID_A, - HPHYBRID_B, - HPHYBRID_C, - HPHYBRID_D, - HPHYBRID_P, - HPHYBRID_R, - HPHYBRID_IV, - HPHYBRID_PA, - HPHYBRID_DMAPA, - HPHYBRID_DMAMA, - HPHYBRID_DMAC, - HPHYBRID_I + HPHYBRID_A, + HPHYBRID_B, + HPHYBRID_C, + HPHYBRID_D, + HPHYBRID_P, + HPHYBRID_R, + HPHYBRID_IV, + HPHYBRID_PA, + HPHYBRID_DMAPA, + HPHYBRID_DMAMA, + HPHYBRID_DMAC, + HPHYBRID_I }; #define BIT_MASK(n) (1U << (n)) @@ -29,8 +32,8 @@ enum { // Bits in m_flags #define HPHYBRID_C_BIT 0 // Carry/extend #define HPHYBRID_O_BIT 1 // Overflow -#define HPHYBRID_CB_BIT 2 // Cb -#define HPHYBRID_DB_BIT 3 // Db +#define HPHYBRID_CB_BIT 2 // Cb +#define HPHYBRID_DB_BIT 3 // Db #define HPHYBRID_INTEN_BIT 4 // Interrupt enable #define HPHYBRID_DMAEN_BIT 5 // DMA enable #define HPHYBRID_DMADIR_BIT 6 // DMA direction (1 = OUT) @@ -46,814 +49,877 @@ enum { #define HP_RESET_ADDR 0x0020 -#define MAKE_IOADDR(pa , ic) (((pa) << HP_IOADDR_PA_SHIFT) | ((ic) << HP_IOADDR_IC_SHIFT)) - const device_type HP_5061_3011 = &device_creator<hp_5061_3011_cpu_device>; hp_hybrid_cpu_device::hp_hybrid_cpu_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname) - : cpu_device(mconfig, type, name, tag, owner, clock, shortname, __FILE__), - m_program_config("program", ENDIANNESS_BIG, 16, 16, -1), - m_io_config("io", ENDIANNESS_BIG, 16, 6, -1) +: cpu_device(mconfig, type, name, tag, owner, clock, shortname, __FILE__), + m_program_config("program", ENDIANNESS_BIG, 16, 16, -1), + m_io_config("io", ENDIANNESS_BIG, 16, 6, -1) { } void hp_hybrid_cpu_device::device_start() { - m_reg_A = 0; - m_reg_B = 0; - m_reg_P = HP_RESET_ADDR; - m_reg_R = 0; - m_reg_C = 0; - m_reg_D = 0; - m_reg_IV = 0; - m_reg_PA[ 0 ] = 0; - m_reg_PA[ 1 ] = 0; - m_reg_PA[ 2 ] = 0; - m_flags = 0; - m_dmapa = 0; - m_dmama = 0; - m_dmac = 0; - m_reg_I = 0; - - { - state_add(HPHYBRID_A, "A", m_reg_A); - state_add(HPHYBRID_B, "B", m_reg_B); - state_add(HPHYBRID_C, "C", m_reg_C); - state_add(HPHYBRID_D, "D", m_reg_D); - state_add(HPHYBRID_P, "P", m_reg_P); - state_add(STATE_GENPC, "GENPC", m_reg_P).noshow(); - state_add(HPHYBRID_R, "R", m_reg_R); - state_add(STATE_GENSP, "GENSP", m_reg_R).noshow(); - state_add(HPHYBRID_IV, "IV", m_reg_IV); - state_add(HPHYBRID_PA, "PA", m_reg_PA[ 0 ]); - state_add(STATE_GENFLAGS, "GENFLAGS", m_flags).noshow().formatstr("%9s"); - state_add(HPHYBRID_DMAPA , "DMAPA" , m_dmapa).noshow(); - state_add(HPHYBRID_DMAMA , "DMAMA" , m_dmama).noshow(); - state_add(HPHYBRID_DMAC , "DMAC" , m_dmac).noshow(); - state_add(HPHYBRID_I , "I" , m_reg_I).noshow(); - } - - m_program = &space(AS_PROGRAM); - m_direct = &m_program->direct(); - m_io = &space(AS_IO); - - save_item(NAME(m_reg_A)); - save_item(NAME(m_reg_B)); - save_item(NAME(m_reg_C)); - save_item(NAME(m_reg_D)); - save_item(NAME(m_reg_P)); - save_item(NAME(m_reg_R)); - save_item(NAME(m_reg_IV)); - save_item(NAME(m_reg_PA[0])); - save_item(NAME(m_reg_PA[1])); - save_item(NAME(m_reg_PA[2])); - save_item(NAME(m_flags)); - save_item(NAME(m_dmapa)); - save_item(NAME(m_dmama)); - save_item(NAME(m_dmac)); - save_item(NAME(m_reg_I)); - - m_icountptr = &m_icount; + m_reg_A = 0; + m_reg_B = 0; + m_reg_P = HP_RESET_ADDR; + m_reg_R = 0; + m_reg_C = 0; + m_reg_D = 0; + m_reg_IV = 0; + m_reg_PA[ 0 ] = 0; + m_reg_PA[ 1 ] = 0; + m_reg_PA[ 2 ] = 0; + m_flags = 0; + m_dmapa = 0; + m_dmama = 0; + m_dmac = 0; + m_reg_I = 0; + + { + state_add(HPHYBRID_A, "A", m_reg_A); + state_add(HPHYBRID_B, "B", m_reg_B); + state_add(HPHYBRID_C, "C", m_reg_C); + state_add(HPHYBRID_D, "D", m_reg_D); + state_add(HPHYBRID_P, "P", m_reg_P); + state_add(STATE_GENPC, "GENPC", m_reg_P).noshow(); + state_add(HPHYBRID_R, "R", m_reg_R); + state_add(STATE_GENSP, "GENSP", m_reg_R).noshow(); + state_add(HPHYBRID_IV, "IV", m_reg_IV); + state_add(HPHYBRID_PA, "PA", m_reg_PA[ 0 ]); + state_add(STATE_GENFLAGS, "GENFLAGS", m_flags).noshow().formatstr("%9s"); + state_add(HPHYBRID_DMAPA , "DMAPA" , m_dmapa).noshow(); + state_add(HPHYBRID_DMAMA , "DMAMA" , m_dmama).noshow(); + state_add(HPHYBRID_DMAC , "DMAC" , m_dmac).noshow(); + state_add(HPHYBRID_I , "I" , m_reg_I).noshow(); + } + + m_program = &space(AS_PROGRAM); + m_direct = &m_program->direct(); + m_io = &space(AS_IO); + + save_item(NAME(m_reg_A)); + save_item(NAME(m_reg_B)); + save_item(NAME(m_reg_C)); + save_item(NAME(m_reg_D)); + save_item(NAME(m_reg_P)); + save_item(NAME(m_reg_R)); + save_item(NAME(m_reg_IV)); + save_item(NAME(m_reg_PA[0])); + save_item(NAME(m_reg_PA[1])); + save_item(NAME(m_reg_PA[2])); + save_item(NAME(m_flags)); + save_item(NAME(m_dmapa)); + save_item(NAME(m_dmama)); + save_item(NAME(m_dmac)); + save_item(NAME(m_reg_I)); + + m_icountptr = &m_icount; } void hp_hybrid_cpu_device::device_reset() { - m_reg_P = HP_RESET_ADDR; - m_reg_I = RM(m_reg_P); - m_flags = 0; + m_reg_P = HP_RESET_ADDR; + m_reg_I = RM(m_reg_P); + m_flags = 0; } - + void hp_hybrid_cpu_device::execute_run() { - do { - debugger_instruction_hook(this, m_reg_P); - // TODO: check interrupts - // TODO: check dma - m_reg_I = execute_one(m_reg_I); - } while (m_icount > 0); + do { + debugger_instruction_hook(this, m_reg_P); + + // Check for interrupts + check_for_interrupts(); + + // TODO: check dma + m_reg_I = execute_one(m_reg_I); + } while (m_icount > 0); } void hp_hybrid_cpu_device::execute_set_input(int inputnum, int state) { + if (inputnum < HPHYBRID_INT_LVLS) { + if (state) { + BIT_SET(m_flags , HPHYBRID_IRH_BIT + inputnum); + } else { + BIT_CLR(m_flags , HPHYBRID_IRH_BIT + inputnum); + } + } } -/** +/** * Execute 1 instruction - * + * * @param opcode Opcode to be executed - * + * * @return Next opcode to be executed */ UINT16 hp_hybrid_cpu_device::execute_one(UINT16 opcode) { - if ((opcode & 0x7fe0) == 0x7000) { - // EXE - m_icount -= 8; - return RM(opcode & 0x1f); - } else { - m_reg_P = execute_one_sub(opcode); - return RM(m_reg_P); - } + if ((opcode & 0x7fe0) == 0x7000) { + // EXE + m_icount -= 8; + return RM(opcode & 0x1f); + } else { + m_reg_P = execute_one_sub(opcode); + return RM(m_reg_P); + } } -/** +/** * Execute 1 instruction (except EXE) - * + * * @param opcode Opcode to be executed (no EXE instructions) - * + * * @return new value of P register */ UINT16 hp_hybrid_cpu_device::execute_one_sub(UINT16 opcode) { - UINT16 ea; - UINT16 tmp; - - switch (opcode & 0x7800) { - case 0x0000: - // LDA - m_icount -= 13; - m_reg_A = RM(get_ea(opcode)); - break; - - case 0x0800: - // LDB - m_icount -= 13; - m_reg_B = RM(get_ea(opcode)); - break; - - case 0x1000: - // CPA - m_icount -= 16; - if (m_reg_A != RM(get_ea(opcode))) { - // Skip next instruction - return m_reg_P + 2; - } - break; - - case 0x1800: - // CPB - m_icount -= 16; - if (m_reg_B != RM(get_ea(opcode))) { - // Skip next instruction - return m_reg_P + 2; - } - break; - - case 0x2000: - // ADA - m_icount -= 13; - do_add(m_reg_A , RM(get_ea(opcode))); - break; - - case 0x2800: - // ADB - m_icount -= 13; - do_add(m_reg_B , RM(get_ea(opcode))); - break; - - case 0x3000: - // STA - m_icount -= 13; - WM(get_ea(opcode) , m_reg_A); - break; - - case 0x3800: - // STB - m_icount -= 13; - WM(get_ea(opcode) , m_reg_B); - break; - - case 0x4000: - // JSM - m_icount -= 17; - WM(++m_reg_R , m_reg_P); - return get_ea(opcode); - - case 0x4800: - // ISZ - m_icount -= 19; - ea = get_ea(opcode); - tmp = RM(ea) + 1; - WM(ea , tmp); - if (tmp == 0) { - // Skip next instruction - return m_reg_P + 2; - } - break; - - case 0x5000: - // AND - m_icount -= 13; - m_reg_A &= RM(get_ea(opcode)); - break; - - case 0x5800: - // DSZ - m_icount -= 19; - ea = get_ea(opcode); - tmp = RM(ea) - 1; - WM(ea , tmp); - if (tmp == 0) { - // Skip next instruction - return m_reg_P + 2; - } - break; - - case 0x6000: - // IOR - m_icount -= 13; - m_reg_A |= RM(get_ea(opcode)); - break; - - case 0x6800: - // JMP - m_icount -= 8; - return get_ea(opcode); - - default: - switch (opcode & 0xfec0) { - case 0x7400: - // RZA - // SZA - m_icount -= 14; - return get_skip_addr(opcode , m_reg_A == 0); - - case 0x7440: - // RIA - // SIA - m_icount -= 14; - return get_skip_addr(opcode , m_reg_A++ == 0); - - case 0x7480: - // SFS - // SFC - m_icount -= 14; - // TODO: read flag bit - return get_skip_addr(opcode , true); - - case 0x7C00: - // RZB - // SZB - m_icount -= 14; - return get_skip_addr(opcode , m_reg_B == 0); - - case 0x7C40: - // RIB - // SIB - m_icount -= 14; - return get_skip_addr(opcode , m_reg_B++ == 0); - - case 0x7c80: - // SSS - // SSC - m_icount -= 14; - // TODO: read status bit - return get_skip_addr(opcode , true); - - case 0x7cc0: - // SHS - // SHC - m_icount -= 14; - return get_skip_addr(opcode , !BIT(m_flags , HPHYBRID_HALT_BIT)); - + UINT16 ea; + UINT16 tmp; + + switch (opcode & 0x7800) { + case 0x0000: + // LDA + m_icount -= 13; + m_reg_A = RM(get_ea(opcode)); + break; + + case 0x0800: + // LDB + m_icount -= 13; + m_reg_B = RM(get_ea(opcode)); + break; + + case 0x1000: + // CPA + m_icount -= 16; + if (m_reg_A != RM(get_ea(opcode))) { + // Skip next instruction + return m_reg_P + 2; + } + break; + + case 0x1800: + // CPB + m_icount -= 16; + if (m_reg_B != RM(get_ea(opcode))) { + // Skip next instruction + return m_reg_P + 2; + } + break; + + case 0x2000: + // ADA + m_icount -= 13; + do_add(m_reg_A , RM(get_ea(opcode))); + break; + + case 0x2800: + // ADB + m_icount -= 13; + do_add(m_reg_B , RM(get_ea(opcode))); + break; + + case 0x3000: + // STA + m_icount -= 13; + WM(get_ea(opcode) , m_reg_A); + break; + + case 0x3800: + // STB + m_icount -= 13; + WM(get_ea(opcode) , m_reg_B); + break; + + case 0x4000: + // JSM + m_icount -= 17; + WM(++m_reg_R , m_reg_P); + return get_ea(opcode); + + case 0x4800: + // ISZ + m_icount -= 19; + ea = get_ea(opcode); + tmp = RM(ea) + 1; + WM(ea , tmp); + if (tmp == 0) { + // Skip next instruction + return m_reg_P + 2; + } + break; + + case 0x5000: + // AND + m_icount -= 13; + m_reg_A &= RM(get_ea(opcode)); + break; + + case 0x5800: + // DSZ + m_icount -= 19; + ea = get_ea(opcode); + tmp = RM(ea) - 1; + WM(ea , tmp); + if (tmp == 0) { + // Skip next instruction + return m_reg_P + 2; + } + break; + + case 0x6000: + // IOR + m_icount -= 13; + m_reg_A |= RM(get_ea(opcode)); + break; + + case 0x6800: + // JMP + m_icount -= 8; + return get_ea(opcode); + default: - switch (opcode & 0xfe00) { - case 0x7600: - // SLA - // RLA - m_icount -= 14; - return get_skip_addr_sc(opcode , m_reg_A , 0); - - case 0x7e00: - // SLB - // RLB - m_icount -= 14; - return get_skip_addr_sc(opcode , m_reg_B , 0); - - case 0xf400: - // SAP - // SAM - m_icount -= 14; - return get_skip_addr_sc(opcode , m_reg_A , 15); - - case 0xf600: - // SOC - // SOS - m_icount -= 14; - return get_skip_addr_sc(opcode , m_flags , HPHYBRID_O_BIT); - - case 0xfc00: - // SBP - // SBM - m_icount -= 14; - return get_skip_addr_sc(opcode , m_reg_B , 15); - - case 0xfe00: - // SEC - // SES - m_icount -= 14; - return get_skip_addr_sc(opcode , m_flags , HPHYBRID_C_BIT); - - default: - switch (opcode & 0xfff0) { - case 0xf100: - // AAR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - // A shift by 16 positions is equivalent to a shift by 15 - tmp = tmp > 15 ? 15 : tmp; - m_reg_A = ((m_reg_A ^ 0x8000) >> tmp) - (0x8000 >> tmp); - break; - - case 0xf900: - // ABR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - tmp = tmp > 15 ? 15 : tmp; - m_reg_B = ((m_reg_B ^ 0x8000) >> tmp) - (0x8000 >> tmp); - break; - - case 0xf140: - // SAR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_A >>= tmp; - break; - - case 0xf940: - // SBR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_B >>= tmp; - break; - - case 0xf180: - // SAL - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_A <<= tmp; - break; - - case 0xf980: - // SBL - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_B <<= tmp; - break; - - case 0xf1c0: - // RAR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_A = (m_reg_A >> tmp) | (m_reg_A << (16 - tmp)); - break; - - case 0xf9c0: - // RBR - tmp = (opcode & 0xf) + 1; - m_icount -= (9 + tmp); - m_reg_B = (m_reg_B >> tmp) | (m_reg_B << (16 - tmp)); - break; - + switch (opcode & 0xfec0) { + case 0x7400: + // RZA + // SZA + m_icount -= 14; + return get_skip_addr(opcode , m_reg_A == 0); + + case 0x7440: + // RIA + // SIA + m_icount -= 14; + return get_skip_addr(opcode , m_reg_A++ == 0); + + case 0x7480: + // SFS + // SFC + m_icount -= 14; + // TODO: read flag bit + return get_skip_addr(opcode , true); + + case 0x7C00: + // RZB + // SZB + m_icount -= 14; + return get_skip_addr(opcode , m_reg_B == 0); + + case 0x7C40: + // RIB + // SIB + m_icount -= 14; + return get_skip_addr(opcode , m_reg_B++ == 0); + + case 0x7c80: + // SSS + // SSC + m_icount -= 14; + // TODO: read status bit + return get_skip_addr(opcode , true); + + case 0x7cc0: + // SHS + // SHC + m_icount -= 14; + return get_skip_addr(opcode , !BIT(m_flags , HPHYBRID_HALT_BIT)); + default: - if ((opcode & 0xf760) == 0x7160) { - // Place/withdraw instructions - m_icount -= 23; - do_pw(opcode); - } else if ((opcode & 0xff80) == 0xf080) { - // RET - m_icount -= 16; - if (BIT(opcode , 6)) { - // Pop PA stack - if (BIT(m_flags , HPHYBRID_IRH_SVC_BIT)) { - BIT_CLR(m_flags , HPHYBRID_IRH_SVC_BIT); - memmove(&m_reg_PA[ 0 ] , &m_reg_PA[ 1 ] , HPHYBRID_INT_LVLS); - } else if (BIT(m_flags , HPHYBRID_IRL_SVC_BIT)) { - BIT_CLR(m_flags , HPHYBRID_IRL_SVC_BIT); - memmove(&m_reg_PA[ 0 ] , &m_reg_PA[ 1 ] , HPHYBRID_INT_LVLS); - } - } - tmp = RM(m_reg_R--) + (opcode & 0x1f); - return BIT(opcode , 5) ? tmp - 0x20 : tmp; - } else { - switch (opcode) { - case 0x7100: - // SDO - m_icount -= 12; - BIT_SET(m_flags , HPHYBRID_DMADIR_BIT); - break; - - case 0x7108: - // SDI - m_icount -= 12; - BIT_CLR(m_flags , HPHYBRID_DMADIR_BIT); - break; - - case 0x7110: - // EIR - m_icount -= 12; - BIT_SET(m_flags , HPHYBRID_INTEN_BIT); - break; - - case 0x7118: - // DIR - m_icount -= 12; - BIT_CLR(m_flags , HPHYBRID_INTEN_BIT); - break; - - case 0x7120: - // DMA - m_icount -= 12; - BIT_SET(m_flags , HPHYBRID_DMAEN_BIT); - break; - - case 0x7138: - // DDR - m_icount -= 12; - BIT_CLR(m_flags , HPHYBRID_DMAEN_BIT); - break; - - case 0x7140: - // DBL - m_icount -= 12; - BIT_CLR(m_flags , HPHYBRID_DB_BIT); - break; - - case 0x7148: - // CBL - m_icount -= 12; - BIT_CLR(m_flags , HPHYBRID_CB_BIT); - break; - - case 0x7150: - // DBU - m_icount -= 12; - BIT_SET(m_flags , HPHYBRID_DB_BIT); - break; - - case 0x7158: - // CBU - m_icount -= 12; - BIT_SET(m_flags , HPHYBRID_CB_BIT); - break; - - case 0xf020: - // TCA - m_icount -= 9; - m_reg_A = ~m_reg_A; - do_add(m_reg_A , 1); - break; - - case 0xf060: - // CMA - m_icount -= 9; - m_reg_A = ~m_reg_A; - break; - - case 0xf820: - // TCB - m_icount -= 9; - m_reg_B = ~m_reg_B; - do_add(m_reg_B , 1); - break; - - case 0xf860: - // CMB - m_icount -= 9; - m_reg_B = ~m_reg_B; - break; - + switch (opcode & 0xfe00) { + case 0x7600: + // SLA + // RLA + m_icount -= 14; + return get_skip_addr_sc(opcode , m_reg_A , 0); + + case 0x7e00: + // SLB + // RLB + m_icount -= 14; + return get_skip_addr_sc(opcode , m_reg_B , 0); + + case 0xf400: + // SAP + // SAM + m_icount -= 14; + return get_skip_addr_sc(opcode , m_reg_A , 15); + + case 0xf600: + // SOC + // SOS + m_icount -= 14; + return get_skip_addr_sc(opcode , m_flags , HPHYBRID_O_BIT); + + case 0xfc00: + // SBP + // SBM + m_icount -= 14; + return get_skip_addr_sc(opcode , m_reg_B , 15); + + case 0xfe00: + // SEC + // SES + m_icount -= 14; + return get_skip_addr_sc(opcode , m_flags , HPHYBRID_C_BIT); + default: - // Unrecognized instructions: NOP - // Execution time is fictional - m_icount -= 6; + switch (opcode & 0xfff0) { + case 0xf100: + // AAR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + // A shift by 16 positions is equivalent to a shift by 15 + tmp = tmp > 15 ? 15 : tmp; + m_reg_A = ((m_reg_A ^ 0x8000) >> tmp) - (0x8000 >> tmp); + break; + + case 0xf900: + // ABR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + tmp = tmp > 15 ? 15 : tmp; + m_reg_B = ((m_reg_B ^ 0x8000) >> tmp) - (0x8000 >> tmp); + break; + + case 0xf140: + // SAR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_A >>= tmp; + break; + + case 0xf940: + // SBR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_B >>= tmp; + break; + + case 0xf180: + // SAL + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_A <<= tmp; + break; + + case 0xf980: + // SBL + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_B <<= tmp; + break; + + case 0xf1c0: + // RAR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_A = (m_reg_A >> tmp) | (m_reg_A << (16 - tmp)); + break; + + case 0xf9c0: + // RBR + tmp = (opcode & 0xf) + 1; + m_icount -= (9 + tmp); + m_reg_B = (m_reg_B >> tmp) | (m_reg_B << (16 - tmp)); + break; + + default: + if ((opcode & 0xf760) == 0x7160) { + // Place/withdraw instructions + m_icount -= 23; + do_pw(opcode); + } else if ((opcode & 0xff80) == 0xf080) { + // RET + m_icount -= 16; + if (BIT(opcode , 6)) { + // Pop PA stack + if (BIT(m_flags , HPHYBRID_IRH_SVC_BIT)) { + BIT_CLR(m_flags , HPHYBRID_IRH_SVC_BIT); + memmove(&m_reg_PA[ 0 ] , &m_reg_PA[ 1 ] , HPHYBRID_INT_LVLS); + } else if (BIT(m_flags , HPHYBRID_IRL_SVC_BIT)) { + BIT_CLR(m_flags , HPHYBRID_IRL_SVC_BIT); + memmove(&m_reg_PA[ 0 ] , &m_reg_PA[ 1 ] , HPHYBRID_INT_LVLS); + } + } + tmp = RM(m_reg_R--) + (opcode & 0x1f); + return BIT(opcode , 5) ? tmp - 0x20 : tmp; + } else { + switch (opcode) { + case 0x7100: + // SDO + m_icount -= 12; + BIT_SET(m_flags , HPHYBRID_DMADIR_BIT); + break; + + case 0x7108: + // SDI + m_icount -= 12; + BIT_CLR(m_flags , HPHYBRID_DMADIR_BIT); + break; + + case 0x7110: + // EIR + m_icount -= 12; + BIT_SET(m_flags , HPHYBRID_INTEN_BIT); + break; + + case 0x7118: + // DIR + m_icount -= 12; + BIT_CLR(m_flags , HPHYBRID_INTEN_BIT); + break; + + case 0x7120: + // DMA + m_icount -= 12; + BIT_SET(m_flags , HPHYBRID_DMAEN_BIT); + break; + + case 0x7138: + // DDR + m_icount -= 12; + BIT_CLR(m_flags , HPHYBRID_DMAEN_BIT); + break; + + case 0x7140: + // DBL + m_icount -= 12; + BIT_CLR(m_flags , HPHYBRID_DB_BIT); + break; + + case 0x7148: + // CBL + m_icount -= 12; + BIT_CLR(m_flags , HPHYBRID_CB_BIT); + break; + + case 0x7150: + // DBU + m_icount -= 12; + BIT_SET(m_flags , HPHYBRID_DB_BIT); + break; + + case 0x7158: + // CBU + m_icount -= 12; + BIT_SET(m_flags , HPHYBRID_CB_BIT); + break; + + case 0xf020: + // TCA + m_icount -= 9; + m_reg_A = ~m_reg_A; + do_add(m_reg_A , 1); + break; + + case 0xf060: + // CMA + m_icount -= 9; + m_reg_A = ~m_reg_A; + break; + + case 0xf820: + // TCB + m_icount -= 9; + m_reg_B = ~m_reg_B; + do_add(m_reg_B , 1); + break; + + case 0xf860: + // CMB + m_icount -= 9; + m_reg_B = ~m_reg_B; + break; + + default: + // Unrecognized instructions: NOP + // Execution time is fictional + m_icount -= 6; + } + } + } } - } } - } } - } - - return m_reg_P + 1; + + return m_reg_P + 1; } void hp_hybrid_cpu_device::state_string_export(const device_state_entry &entry, std::string &str) { - if (entry.index() == STATE_GENFLAGS) { - strprintf(str, "%s %s %c %c", - BIT(m_flags , HPHYBRID_DB_BIT) ? "Db":"..", - BIT(m_flags , HPHYBRID_CB_BIT) ? "Cb":"..", - BIT(m_flags , HPHYBRID_O_BIT) ? 'O':'.', - BIT(m_flags , HPHYBRID_C_BIT) ? 'E':'.'); - } + if (entry.index() == STATE_GENFLAGS) { + strprintf(str, "%s %s %c %c", + BIT(m_flags , HPHYBRID_DB_BIT) ? "Db":"..", + BIT(m_flags , HPHYBRID_CB_BIT) ? "Cb":"..", + BIT(m_flags , HPHYBRID_O_BIT) ? 'O':'.', + BIT(m_flags , HPHYBRID_C_BIT) ? 'E':'.'); + } } offs_t hp_hybrid_cpu_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) { - extern CPU_DISASSEMBLE(hp_hybrid); - return CPU_DISASSEMBLE_NAME(hp_hybrid)(this, buffer, pc, oprom, opram, options); + extern CPU_DISASSEMBLE(hp_hybrid); + return CPU_DISASSEMBLE_NAME(hp_hybrid)(this, buffer, pc, oprom, opram, options); } UINT16 hp_hybrid_cpu_device::get_ea(UINT16 opcode) { - UINT16 base; - UINT16 off; - - if (BIT(opcode , 10)) { - // Current page - base = m_reg_P; - } else { - // Base page - base = 0; - } - - off = opcode & 0x3ff; - if (off & 0x200) { - off -= 0x400; - } - - base += off; - - if (BIT(opcode , 15)) { - // Indirect addressing - m_icount -= 6; - return RM(base); - } else { - // Direct addressing - return base; - } + UINT16 base; + UINT16 off; + + if (BIT(opcode , 10)) { + // Current page + base = m_reg_P; + } else { + // Base page + base = 0; + } + + off = opcode & 0x3ff; + if (off & 0x200) { + off -= 0x400; + } + + base += off; + + if (BIT(opcode , 15)) { + // Indirect addressing + m_icount -= 6; + return RM(base); + } else { + // Direct addressing + return base; + } } void hp_hybrid_cpu_device::do_add(UINT16& addend1 , UINT16 addend2) { - UINT32 tmp = addend1 + addend2; - - if (BIT(tmp , 16)) { - // Carry - BIT_SET(m_flags , HPHYBRID_C_BIT); - } - - if (BIT((tmp ^ addend1) & (tmp ^ addend2) , 15)) { - // Overflow - BIT_SET(m_flags , HPHYBRID_O_BIT); - } - - addend1 = (UINT16)tmp; + UINT32 tmp = addend1 + addend2; + + if (BIT(tmp , 16)) { + // Carry + BIT_SET(m_flags , HPHYBRID_C_BIT); + } + + if (BIT((tmp ^ addend1) & (tmp ^ addend2) , 15)) { + // Overflow + BIT_SET(m_flags , HPHYBRID_O_BIT); + } + + addend1 = (UINT16)tmp; } UINT16 hp_hybrid_cpu_device::get_skip_addr(UINT16 opcode , bool condition) const { - bool skip_val = BIT(opcode , 8) != 0; - - if (condition == skip_val) { - UINT16 off = opcode & 0x1f; - - if (BIT(opcode , 5)) { - off -= 0x20; + bool skip_val = BIT(opcode , 8) != 0; + + if (condition == skip_val) { + UINT16 off = opcode & 0x1f; + + if (BIT(opcode , 5)) { + off -= 0x20; + } + return m_reg_P + off; + } else { + return m_reg_P + 1; } - return m_reg_P + off; - } else { - return m_reg_P + 1; - } } UINT16 hp_hybrid_cpu_device::get_skip_addr_sc(UINT16 opcode , UINT16& v , unsigned n) { - bool val = BIT(v , n); + bool val = BIT(v , n); - if (BIT(opcode , 7)) { - if (BIT(opcode , 6)) { - BIT_SET(v , n); - } else { - BIT_CLR(v , n); + if (BIT(opcode , 7)) { + if (BIT(opcode , 6)) { + BIT_SET(v , n); + } else { + BIT_CLR(v , n); + } } - } - - return get_skip_addr(opcode , val); + + return get_skip_addr(opcode , val); } void hp_hybrid_cpu_device::do_pw(UINT16 opcode) { - UINT16 tmp; - UINT16 reg_addr = opcode & 7; - UINT16 *ptr_reg; - UINT16 b_mask; - - if (BIT(opcode , 3)) { - ptr_reg = &m_reg_D; - b_mask = BIT_MASK(HPHYBRID_DB_BIT); - } else { - ptr_reg = &m_reg_C; - b_mask = BIT_MASK(HPHYBRID_CB_BIT); - } - - if (BIT(opcode , 4)) { - // Withdraw - if (BIT(opcode , 11)) { - // Byte - UINT32 tmp_addr = (UINT32)(*ptr_reg); - if (m_flags & b_mask) { - tmp_addr |= 0x10000; - } - tmp = RM((UINT16)(tmp_addr >> 1)); - if (BIT(tmp_addr , 0)) { - tmp &= 0xff; - } else { - tmp >>= 8; - } + UINT16 tmp; + UINT16 reg_addr = opcode & 7; + UINT16 *ptr_reg; + UINT16 b_mask; + + if (BIT(opcode , 3)) { + ptr_reg = &m_reg_D; + b_mask = BIT_MASK(HPHYBRID_DB_BIT); } else { - // Word - tmp = RM(*ptr_reg); + ptr_reg = &m_reg_C; + b_mask = BIT_MASK(HPHYBRID_CB_BIT); } - WM(reg_addr , tmp); - - if (BIT(opcode , 7)) { - // Post-decrement - if ((*ptr_reg)-- == 0) { - m_flags ^= b_mask; - } + + if (BIT(opcode , 4)) { + // Withdraw + if (BIT(opcode , 11)) { + // Byte + UINT32 tmp_addr = (UINT32)(*ptr_reg); + if (m_flags & b_mask) { + tmp_addr |= 0x10000; + } + tmp = RM((UINT16)(tmp_addr >> 1)); + if (BIT(tmp_addr , 0)) { + tmp &= 0xff; + } else { + tmp >>= 8; + } + } else { + // Word + tmp = RM(*ptr_reg); + } + WM(reg_addr , tmp); + + if (BIT(opcode , 7)) { + // Post-decrement + if ((*ptr_reg)-- == 0) { + m_flags ^= b_mask; + } + } else { + // Post-increment + if (++(*ptr_reg) == 0) { + m_flags ^= b_mask; + } + } } else { - // Post-increment - if (++(*ptr_reg) == 0) { - m_flags ^= b_mask; - } + // Place + if (BIT(opcode , 7)) { + // Pre-decrement + if ((*ptr_reg)-- == 0) { + m_flags ^= b_mask; + } + } else { + // Pre-increment + if (++(*ptr_reg) == 0) { + m_flags ^= b_mask; + } + } + tmp = RM(reg_addr); + if (BIT(opcode , 11)) { + // Byte + UINT32 tmp_addr = (UINT32)(*ptr_reg); + if (m_flags & b_mask) { + tmp_addr |= 0x10000; + } + WMB(tmp_addr , (UINT8)tmp); + } else { + // Word + WM(*ptr_reg , tmp); + } } - } else { - // Place - if (BIT(opcode , 7)) { - // Pre-decrement - if ((*ptr_reg)-- == 0) { - m_flags ^= b_mask; - } +} + +void hp_hybrid_cpu_device::check_for_interrupts(void) +{ + if (!BIT(m_flags , HPHYBRID_INTEN_BIT) || BIT(m_flags , HPHYBRID_IRH_SVC_BIT)) { + return; + } + + int irqline; + + if (BIT(m_flags , HPHYBRID_IRH_BIT)) { + // Service high-level interrupt + BIT_SET(m_flags , HPHYBRID_IRH_SVC_BIT); + irqline = HPHYBRID_IRH; + } else if (BIT(m_flags , HPHYBRID_IRL_BIT) && !BIT(m_flags , HPHYBRID_IRL_SVC_BIT)) { + // Service low-level interrupt + BIT_SET(m_flags , HPHYBRID_IRL_SVC_BIT); + irqline = HPHYBRID_IRL; } else { - // Pre-increment - if (++(*ptr_reg) == 0) { - m_flags ^= b_mask; - } + return; } - tmp = RM(reg_addr); - if (BIT(opcode , 11)) { - // Byte - UINT32 tmp_addr = (UINT32)(*ptr_reg); - if (m_flags & b_mask) { - tmp_addr |= 0x10000; - } - WMB(tmp_addr , (UINT8)tmp); + + // Get interrupt vector in low byte + UINT8 vector = (UINT8)standard_irq_callback(irqline); + UINT8 new_PA; + + // Get highest numbered 1 + // Don't know what happens if vector is 0, here we assume bit 7 = 1 + if (vector == 0) { + new_PA = 7; } else { - // Word - WM(*ptr_reg , tmp); + for (new_PA = 7; new_PA && !BIT(vector , 7); new_PA--, vector <<= 1) { + } } - } + if (irqline == HPHYBRID_IRH) { + BIT_SET(new_PA , 3); + } + + // Push PA stack + memmove(&m_reg_PA[ 1 ] , &m_reg_PA[ 0 ] , HPHYBRID_INT_LVLS); + + CURRENT_PA = new_PA; + + // Is this correct? Patent @ pg 210 suggests that the whole interrupt recognition sequence + // lasts for 32 cycles (6 are already accounted for in get_ea for one indirection) + m_icount -= 26; + + // Do a double-indirect JSM IV,I instruction + WM(++m_reg_R , m_reg_P); + m_reg_P = RM(get_ea(0xc008)); + m_reg_I = RM(m_reg_P); } UINT16 hp_hybrid_cpu_device::RM(UINT16 addr) { - UINT16 tmp; - - if (addr <= HP_REG_LAST_ADDR) { - // Memory mapped registers - switch (addr) { - case HP_REG_A_ADDR: - return m_reg_A; - - case HP_REG_B_ADDR: - return m_reg_B; - - case HP_REG_P_ADDR: - return m_reg_P; - - case HP_REG_R_ADDR: - return m_reg_R; - - case HP_REG_R4_ADDR: - case HP_REG_R5_ADDR: - case HP_REG_R6_ADDR: - case HP_REG_R7_ADDR: - return RIO(CURRENT_PA , addr - HP_REG_R4_ADDR); - - case HP_REG_IV_ADDR: - return m_reg_IV; - - case HP_REG_PA_ADDR: - return CURRENT_PA; - - case HP_REG_DMAPA_ADDR: - tmp = m_dmapa & HP_REG_PA_MASK; - if (BIT(m_flags , HPHYBRID_CB_BIT)) { - BIT_SET(tmp , 15); - } - if (BIT(m_flags , HPHYBRID_DB_BIT)) { - BIT_SET(tmp , 14); - } - return tmp; - - case HP_REG_DMAMA_ADDR: - return m_dmama; - - case HP_REG_DMAC_ADDR: - return m_dmac; - - case HP_REG_C_ADDR: - return m_reg_C; - - case HP_REG_D_ADDR: - return m_reg_D; - - default: - // Unknown registers are returned as 0 - return 0; + UINT16 tmp; + + if (addr <= HP_REG_LAST_ADDR) { + // Memory mapped registers + switch (addr) { + case HP_REG_A_ADDR: + return m_reg_A; + + case HP_REG_B_ADDR: + return m_reg_B; + + case HP_REG_P_ADDR: + return m_reg_P; + + case HP_REG_R_ADDR: + return m_reg_R; + + case HP_REG_R4_ADDR: + case HP_REG_R5_ADDR: + case HP_REG_R6_ADDR: + case HP_REG_R7_ADDR: + return RIO(CURRENT_PA , addr - HP_REG_R4_ADDR); + + case HP_REG_IV_ADDR: + // Correct? + if (!BIT(m_flags , HPHYBRID_IRH_SVC_BIT) && !BIT(m_flags , HPHYBRID_IRL_SVC_BIT)) { + return m_reg_IV; + } else { + return m_reg_IV | CURRENT_PA; + } + + case HP_REG_PA_ADDR: + return CURRENT_PA; + + case HP_REG_DMAPA_ADDR: + tmp = m_dmapa & HP_REG_PA_MASK; + if (BIT(m_flags , HPHYBRID_CB_BIT)) { + BIT_SET(tmp , 15); + } + if (BIT(m_flags , HPHYBRID_DB_BIT)) { + BIT_SET(tmp , 14); + } + return tmp; + + case HP_REG_DMAMA_ADDR: + return m_dmama; + + case HP_REG_DMAC_ADDR: + return m_dmac; + + case HP_REG_C_ADDR: + return m_reg_C; + + case HP_REG_D_ADDR: + return m_reg_D; + + default: + // Unknown registers are returned as 0 + return 0; + } + } else { + return m_direct->read_decrypted_word((offs_t)addr << 1); } - } else { - return m_direct->read_decrypted_word((offs_t)addr << 1); - } } void hp_hybrid_cpu_device::WM(UINT16 addr , UINT16 v) { - if (addr <= HP_REG_LAST_ADDR) { - // Memory mapped registers - switch (addr) { - case HP_REG_A_ADDR: - m_reg_A = v; - break; - - case HP_REG_B_ADDR: - m_reg_B = v; - break; - - case HP_REG_P_ADDR: - m_reg_P = v; - break; - - case HP_REG_R_ADDR: - m_reg_R = v; - break; - - case HP_REG_R4_ADDR: - case HP_REG_R5_ADDR: - case HP_REG_R6_ADDR: - case HP_REG_R7_ADDR: - WIO(CURRENT_PA , addr - HP_REG_R4_ADDR , v); - break; - - case HP_REG_IV_ADDR: - m_reg_IV = v & HP_REG_IV_MASK; - break; - - case HP_REG_PA_ADDR: - CURRENT_PA = v & HP_REG_PA_MASK; - break; - - case HP_REG_DMAPA_ADDR: - m_dmapa = v & HP_REG_PA_MASK; - break; - - case HP_REG_DMAMA_ADDR: - m_dmama = v; - break; - - case HP_REG_DMAC_ADDR: - m_dmac = v; - break; - - case HP_REG_C_ADDR: - m_reg_C = v; - break; - - case HP_REG_D_ADDR: - m_reg_D = v; - break; - - default: - // Unknown registers are silently discarded - break; + if (addr <= HP_REG_LAST_ADDR) { + // Memory mapped registers + switch (addr) { + case HP_REG_A_ADDR: + m_reg_A = v; + break; + + case HP_REG_B_ADDR: + m_reg_B = v; + break; + + case HP_REG_P_ADDR: + m_reg_P = v; + break; + + case HP_REG_R_ADDR: + m_reg_R = v; + break; + + case HP_REG_R4_ADDR: + case HP_REG_R5_ADDR: + case HP_REG_R6_ADDR: + case HP_REG_R7_ADDR: + WIO(CURRENT_PA , addr - HP_REG_R4_ADDR , v); + break; + + case HP_REG_IV_ADDR: + m_reg_IV = v & HP_REG_IV_MASK; + break; + + case HP_REG_PA_ADDR: + CURRENT_PA = v & HP_REG_PA_MASK; + break; + + case HP_REG_DMAPA_ADDR: + m_dmapa = v & HP_REG_PA_MASK; + break; + + case HP_REG_DMAMA_ADDR: + m_dmama = v; + break; + + case HP_REG_DMAC_ADDR: + m_dmac = v; + break; + + case HP_REG_C_ADDR: + m_reg_C = v; + break; + + case HP_REG_D_ADDR: + m_reg_D = v; + break; + + default: + // Unknown registers are silently discarded + break; + } + } else { + m_program->write_word((offs_t)addr << 1 , v); } - } else { - m_program->write_word((offs_t)addr << 1 , v); - } } void hp_hybrid_cpu_device::WMB(UINT32 addr , UINT8 v) { - if (addr <= (HP_REG_LAST_ADDR * 2 + 1)) { - // Cannot write bytes to registers - } else { - m_program->write_byte(addr , v); - } + if (addr <= (HP_REG_LAST_ADDR * 2 + 1)) { + // Cannot write bytes to registers + } else { + m_program->write_byte(addr , v); + } } UINT16 hp_hybrid_cpu_device::RIO(UINT8 pa , UINT8 ic) { - return m_io->read_word(MAKE_IOADDR(pa, ic) << 1); + return m_io->read_word(HP_MAKE_IOADDR(pa, ic) << 1); } - + void hp_hybrid_cpu_device::WIO(UINT8 pa , UINT8 ic , UINT16 v) { - m_io->write_word(MAKE_IOADDR(pa, ic) << 1 , v); + m_io->write_word(HP_MAKE_IOADDR(pa, ic) << 1 , v); } hp_5061_3011_cpu_device::hp_5061_3011_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) - : hp_hybrid_cpu_device(mconfig, HP_5061_3011, "HP_5061_3011", tag, owner, clock, "5061-3011") +: hp_hybrid_cpu_device(mconfig, HP_5061_3011, "HP_5061_3011", tag, owner, clock, "5061-3011") { } - |