diff options
Diffstat (limited to 'src/emu/cpu/hphybrid/hphybrid_dasm.c')
-rw-r--r-- | src/emu/cpu/hphybrid/hphybrid_dasm.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/src/emu/cpu/hphybrid/hphybrid_dasm.c b/src/emu/cpu/hphybrid/hphybrid_dasm.c new file mode 100644 index 00000000000..e9eddf49a96 --- /dev/null +++ b/src/emu/cpu/hphybrid/hphybrid_dasm.c @@ -0,0 +1,281 @@ +// license:BSD-3-Clause +// copyright-holders:F. Ulivi +// ******************************************************************************** +// * HP "hybrid" processor disassembler +// ******************************************************************************** + +#include "emu.h" +#include "debugger.h" +#include "hphybrid.h" + +typedef void (*fn_dis_param)(char *buffer , offs_t pc , UINT16 opcode); + +typedef struct { + UINT16 m_op_mask; + UINT16 m_opcode; + const char *m_mnemonic; + fn_dis_param m_param_fn; + UINT32 m_dasm_flags; +} dis_entry_t; + +static void addr_2_str(char *buffer , UINT16 addr , bool indirect) +{ + char *s = buffer + strlen(buffer); + + s += sprintf(s , "$%04x" , addr); + + switch (addr) { + case HP_REG_A_ADDR: + strcpy(s , "(A)"); + break; + + case HP_REG_B_ADDR: + strcpy(s , "(B)"); + break; + + case HP_REG_P_ADDR: + strcpy(s , "(P)"); + break; + + case HP_REG_R_ADDR: + strcpy(s , "(R)"); + break; + + case HP_REG_R4_ADDR: + strcpy(s , "(R4)"); + break; + + case HP_REG_R5_ADDR: + strcpy(s , "(R5)"); + break; + + case HP_REG_R6_ADDR: + strcpy(s , "(R6)"); + break; + + case HP_REG_R7_ADDR: + strcpy(s , "(R7)"); + break; + + case HP_REG_IV_ADDR: + strcpy(s , "(IV)"); + break; + + case HP_REG_PA_ADDR: + strcpy(s , "(PA)"); + break; + + case HP_REG_DMAPA_ADDR: + strcpy(s , "(DMAPA)"); + break; + + case HP_REG_DMAMA_ADDR: + strcpy(s , "(DMAMA)"); + break; + + case HP_REG_DMAC_ADDR: + strcpy(s , "(DMAC)"); + break; + + case HP_REG_C_ADDR: + strcpy(s , "(C)"); + break; + + case HP_REG_D_ADDR: + strcpy(s , "(D)"); + break; + } + + if (indirect) { + strcat(s , ",I"); + } +} + +static void param_none(char *buffer , offs_t pc , UINT16 opcode) +{ +} + +static void param_loc(char *buffer , offs_t pc , UINT16 opcode) +{ + UINT16 base; + UINT16 off; + + if (opcode & 0x0400) { + // Current page + base = pc; + } else { + // Base page + base = 0; + } + + off = opcode & 0x3ff; + if (off & 0x200) { + off -= 0x400; + } + + addr_2_str(buffer , base + off , (opcode & 0x8000) != 0); +} + +static void param_addr32(char *buffer , offs_t pc , UINT16 opcode) +{ + addr_2_str(buffer , opcode & 0x1f , (opcode & 0x8000) != 0); +} + +static void param_skip(char *buffer , offs_t pc , UINT16 opcode) +{ + UINT16 off = opcode & 0x3f; + if (off & 0x20) { + off -= 0x40; + } + addr_2_str(buffer , pc + off , false); +} + +static void param_skip_sc(char *buffer , offs_t pc , UINT16 opcode) +{ + param_skip(buffer, pc, opcode); + + if (opcode & 0x80) { + if (opcode & 0x40) { + strcat(buffer , ",S"); + } else { + strcat(buffer , ",C"); + } + } +} + +static void param_ret(char *buffer , offs_t pc , UINT16 opcode) +{ + char *s = buffer + strlen(buffer); + + int off = opcode & 0x3f; + + if (off & 0x20) { + off -= 0x40; + } + + s += sprintf(s , "%d" , off); + if (opcode & 0x40) { + strcpy(s , ",P"); + } +} + +static void param_n16(char *buffer , offs_t pc , UINT16 opcode) +{ + char *s = buffer + strlen(buffer); + + sprintf(s , "%u" , (opcode & 0xf) + 1); +} + +static void param_reg_id(char *buffer , offs_t pc , UINT16 opcode) +{ + addr_2_str(buffer, opcode & 7, false); + + if (opcode & 0x80) { + strcat(buffer , ",D"); + } else { + strcat(buffer , ",I"); + } +} + +static const dis_entry_t dis_table[] = { + // *** BPC Instructions *** + {0xffff , 0x0000 , "NOP" , param_none , 0 }, + {0x7800 , 0x0000 , "LDA" , param_loc , 0 }, + {0x7800 , 0x0800 , "LDB" , param_loc , 0 }, + {0x7800 , 0x1000 , "CPA" , param_loc , 0 }, + {0x7800 , 0x1800 , "CPB" , param_loc , 0 }, + {0x7800 , 0x2000 , "ADA" , param_loc , 0 }, + {0x7800 , 0x2800 , "ADB" , param_loc , 0 }, + {0x7800 , 0x3000 , "STA" , param_loc , 0 }, + {0x7800 , 0x3800 , "STB" , param_loc , 0 }, + {0x7800 , 0x4000 , "JSM" , param_loc , DASMFLAG_STEP_OVER }, + {0x7800 , 0x4800 , "ISZ" , param_loc , 0 }, + {0x7800 , 0x5000 , "AND" , param_loc , 0 }, + {0x7800 , 0x5800 , "DSZ" , param_loc , 0 }, + {0x7800 , 0x6000 , "IOR" , param_loc , 0 }, + {0x7800 , 0x6800 , "JMP" , param_loc , 0 }, + {0x7fe0 , 0x7000 , "EXE" , param_addr32 , 0 }, + {0xffc0 , 0x7400 , "RZA" , param_skip , 0 }, + {0xffc0 , 0x7C00 , "RZB" , param_skip , 0 }, + {0xffc0 , 0x7440 , "RIA" , param_skip , 0 }, + {0xffc0 , 0x7C40 , "RIB" , param_skip , 0 }, + {0xffc0 , 0x7500 , "SZA" , param_skip , 0 }, + {0xffc0 , 0x7D00 , "SZB" , param_skip , 0 }, + {0xffc0 , 0x7540 , "SIA" , param_skip , 0 }, + {0xffc0 , 0x7D40 , "SIB" , param_skip , 0 }, + {0xffc0 , 0x7480 , "SFS" , param_skip , 0 }, + {0xffc0 , 0x7580 , "SFC" , param_skip , 0 }, + {0xffc0 , 0x7c80 , "SSS" , param_skip , 0 }, + {0xffc0 , 0x7d80 , "SSC" , param_skip , 0 }, + {0xffc0 , 0x7cc0 , "SHS" , param_skip , 0 }, + {0xffc0 , 0x7dc0 , "SHC" , param_skip , 0 }, + {0xff00 , 0x7600 , "SLA" , param_skip_sc , 0 }, + {0xff00 , 0x7e00 , "SLB" , param_skip_sc , 0 }, + {0xff00 , 0x7700 , "RLA" , param_skip_sc , 0 }, + {0xff00 , 0x7f00 , "RLB" , param_skip_sc , 0 }, + {0xff00 , 0xf400 , "SAP" , param_skip_sc , 0 }, + {0xff00 , 0xfc00 , "SBP" , param_skip_sc , 0 }, + {0xff00 , 0xf500 , "SAM" , param_skip_sc , 0 }, + {0xff00 , 0xfd00 , "SBM" , param_skip_sc , 0 }, + {0xff00 , 0xf600 , "SOC" , param_skip_sc , 0 }, + {0xff00 , 0xf700 , "SOS" , param_skip_sc , 0 }, + {0xff00 , 0xfe00 , "SEC" , param_skip_sc , 0 }, + {0xff00 , 0xff00 , "SES" , param_skip_sc , 0 }, + {0xffff , 0xf020 , "TCA" , param_none , 0 }, + {0xffff , 0xf820 , "TCB" , param_none , 0 }, + {0xffff , 0xf060 , "CMA" , param_none , 0 }, + {0xffff , 0xf860 , "CMB" , param_none , 0 }, + {0xff80 , 0xf080 , "RET" , param_ret , DASMFLAG_STEP_OUT }, + {0xfff0 , 0xf100 , "AAR" , param_n16 , 0 }, + {0xfff0 , 0xf900 , "ABR" , param_n16 , 0 }, + {0xffff , 0xf14f , "CLA" , param_none , 0 }, + {0xfff0 , 0xf140 , "SAR" , param_n16 , 0 }, + {0xffff , 0xf94f , "CLB" , param_none , 0 }, + {0xfff0 , 0xf940 , "SBR" , param_n16 , 0 }, + {0xfff0 , 0xf180 , "SAL" , param_n16 , 0 }, + {0xfff0 , 0xf980 , "SBL" , param_n16 , 0 }, + {0xfff0 , 0xf1c0 , "RAR" , param_n16 , 0 }, + {0xfff0 , 0xf9c0 , "RBR" , param_n16 , 0 }, + // *** IOC Instructions *** + {0xffff , 0x7100 , "SDO" , param_none , 0 }, + {0xffff , 0x7108 , "SDI" , param_none , 0 }, + {0xffff , 0x7110 , "EIR" , param_none , 0 }, + {0xffff , 0x7118 , "DIR" , param_none , 0 }, + {0xffff , 0x7120 , "DMA" , param_none , 0 }, + {0xffff , 0x7128 , "PCM" , param_none , 0 }, + {0xffff , 0x7138 , "DDR" , param_none , 0 }, + {0xffff , 0x7140 , "DBL" , param_none , 0 }, + {0xffff , 0x7148 , "CBL" , param_none , 0 }, + {0xffff , 0x7150 , "DBU" , param_none , 0 }, + {0xffff , 0x7158 , "CBU" , param_none , 0 }, + {0xff78 , 0x7160 , "PWC" , param_reg_id , 0 }, + {0xff78 , 0x7168 , "PWD" , param_reg_id , 0 }, + {0xff78 , 0x7960 , "PBC" , param_reg_id , 0 }, + {0xff78 , 0x7968 , "PBD" , param_reg_id , 0 }, + {0xff78 , 0x7170 , "WWC" , param_reg_id , 0 }, + {0xff78 , 0x7178 , "WWD" , param_reg_id , 0 }, + {0xff78 , 0x7970 , "WBC" , param_reg_id , 0 }, + {0xff78 , 0x7978 , "WBD" , param_reg_id , 0 }, + // *** END *** + {0 , 0 , NULL , NULL , 0 } +}; + +CPU_DISASSEMBLE(hp_hybrid) +{ + UINT16 opcode = ((UINT16)oprom[ 0 ] << 8) | oprom[ 1 ]; + const dis_entry_t *p; + + for (p = dis_table; p->m_op_mask; p++) { + if ((opcode & p->m_op_mask) == p->m_opcode) { + strcpy(buffer , p->m_mnemonic); + strcat(buffer , " "); + p->m_param_fn(buffer , pc , opcode); + return 1 | p->m_dasm_flags | DASMFLAG_SUPPORTED; + } + } + + // Unknown opcode + strcpy(buffer , "???"); + + return 1 | DASMFLAG_SUPPORTED; +} |