[VM][PC9801][I286][I86][I386][WIP] Add pseudo SASI BIOS for PC-9801.WIP.

[csp-qt/common_source_project-fm7.git] / source / src / vm / mame / emu / cpu / i86 / instr86.c

diff --git a/source/src/vm/mame/emu/cpu/i86/instr86.c b/source/src/vm/mame/emu/cpu/i86/instr86.c
index faf1b86..41789a8 100644 (file)
--- a/source/src/vm/mame/emu/cpu/i86/instr86.c
+++ b/source/src/vm/mame/emu/cpu/i86/instr86.c
@@ -2417,14 +2417,33 @@ static void PREFIX86(_int3)(i8086_state *cpustate)    /* Opcode 0xcc */
        PREFIX(_interrupt)(cpustate, 3);
 }
 
+#ifdef I80286
+extern void i80286_code_descriptor(i80286_state *cpustate, UINT16 selector, UINT16 offset, int gate);
+#endif
 static void PREFIX86(_int)(i8086_state *cpustate)    /* Opcode 0xcd */
 {
        unsigned int_num = FETCH;
        ICOUNT -= timing.int_imm;
 
 #ifdef I86_PSEUDO_BIOS
+       cpustate->regs.w[8] = 0x0000;
+       cpustate->regs.w[9] = 0x0000;
        if(cpustate->bios != NULL && cpustate->bios->bios_int_i86(int_num, cpustate->regs.w, cpustate->sregs, &cpustate->ZeroVal, &cpustate->CarryVal)) {
                ICOUNT -= timing.iret;
+#if 1          
+               if((cpustate->regs.w[8] != 0x0000) || (cpustate->regs.w[9] != 0x0000)) {
+                       UINT32 hi = cpustate->regs.w[9];
+                       UINT32 lo = cpustate->regs.w[8];
+                       UINT32 addr = (hi << 16) | lo;
+#ifdef I80286
+                       i80286_code_descriptor(cpustate, cpustate->sregs[1],lo, 1);
+#else
+                       cpustate->base[CS] = SegBase(CS);
+                       cpustate->pc = (cpustate->base[CS] + addr) & AMASK;
+#endif
+                       printf("PC=%04x:%04x\n", cpustate->sregs[CS], cpustate->pc);
+               }
+#endif
                return;
        }
 #endif