--- np2/i286x/i286x.cpp 2003/12/25 19:26:55 1.11 +++ np2/i286x/i286x.cpp 2004/01/25 07:53:08 1.17 @@ -57,21 +57,72 @@ void i286x_initialize(void) { v30xinit(); } +void i286x_deinitialize(void) { + + if (CPU_EXTMEM) { + _MFREE(CPU_EXTMEM); + CPU_EXTMEM = NULL; + CPU_EXTMEMSIZE = 0; + } +} + +static void i286x_initreg(void) { + + I286_CS = 0xf000; + CS_BASE = 0xf0000; + I286_IP = 0xfff0; + i286core.s.adrsmask = 0xfffff; + i286x_resetprefetch(); +} + void i286x_reset(void) { ZeroMemory(&i286core.s, sizeof(i286core.s)); - I286_CS = 0xffff; - CS_BASE = 0xffff0; - i286core.s.adrsmask = 0xfffff; + i286x_initreg(); } void i286x_shut(void) { - CPU_CS = 0xffff; - CS_BASE = 0xffff0; - CPU_IP = 0; - CPU_ADRSMASK = 0xfffff; - i286x_resetprefetch(); + ZeroMemory(&i286core.s, offsetof(I286STAT, cpu_type)); + i286x_initreg(); +} + +void i286x_setextsize(UINT32 size) { + + if (CPU_EXTMEMSIZE != size) { + if (CPU_EXTMEM) { + _MFREE(CPU_EXTMEM); + CPU_EXTMEM = NULL; + } + if (size) { + CPU_EXTMEM = (BYTE *)_MALLOC(size + 16, "EXTMEM"); + if (CPU_EXTMEM == NULL) { + size = 0; + } + } + CPU_EXTMEMSIZE = size; + } + i286core.e.ems[0] = mem + 0xc0000; + i286core.e.ems[1] = mem + 0xc4000; + i286core.e.ems[2] = mem + 0xc8000; + i286core.e.ems[3] = mem + 0xcc000; +} + +void i286x_setemm(UINT frame, UINT32 addr) { + + BYTE *ptr; + + frame &= 3; + if (addr < USE_HIMEM) { + ptr = mem + addr; + } + else if ((addr - 0x100000 + 0x4000) <= CPU_EXTMEMSIZE) { + ptr = CPU_EXTMEM + (addr - 0x100000); + } + else { + ptr = mem + 0xc0000 + (frame << 14); + } + i286core.e.ems[frame] = ptr; } @@ -176,6 +227,30 @@ LABEL void __fastcall i286x_localint(voi } +// プロテクトモードのセレクタ(in ax / ret eax) +LABEL void __fastcall i286x_selector(void) { + + __asm { + mov ecx, dword ptr (I286_GDTR.base) + test eax, 4 + je short ixsl_1 + mov ecx, dword ptr (I286_LDTRC.base) +ixsl_1: and eax, not 7 + and ecx, 0ffffffh + lea ecx, [ecx + eax + 2] + call i286_memoryread_w + push eax + add ecx, 2 + call i286_memoryread + pop ecx + and eax, 0ffh + movzx ecx, cx + shl eax, 16 + add eax, ecx + ret + } +} + LABEL void i286x(void) { @@ -372,11 +447,16 @@ I286 pop_es(void) { // 07: pop es __asm { I286CLOCK(5) REGPOP(I286_ES) - and eax, 00ffffh + movzx eax, ax + test I286_MSW, MSW_PE + jne short pop_es_pe shl eax, 4 // make segreg - mov ES_BASE, eax +pop_es_base: mov ES_BASE, eax GET_NEXTPRE1 ret + +pop_es_pe: push offset pop_es_base + jmp i286x_selector } } @@ -580,9 +660,11 @@ I286 pop_ss(void) { // 17: pop ss __asm { I286CLOCK(5) REGPOP(I286_SS) - and eax, 00ffffh + movzx eax, ax + test I286_MSW, MSW_PE + jne short pop_ss_pe shl eax, 4 // make segreg - mov SS_BASE, eax +pop_ss_base: mov SS_BASE, eax mov SS_FIX, eax cmp i286core.s.prefix, 0 // 00/06/24 jne prefix_exist @@ -591,6 +673,9 @@ I286 pop_ss(void) { // 17: pop ss GET_NEXTPRE1 jmp i286op[ebp*4] +pop_ss_pe: push offset pop_ss_base + jmp i286x_selector + prefix_exist: pop eax // eax<-offset removeprefix call eax jmp noprefix @@ -704,12 +789,17 @@ I286 pop_ds(void) { // 1F: pop ds __asm { I286CLOCK(5) REGPOP(I286_DS) - and eax, 00ffffh + movzx eax, ax + test I286_MSW, MSW_PE + jne short pop_ds_pe shl eax, 4 // make segreg - mov DS_BASE, eax +pop_ds_base: mov DS_BASE, eax mov DS_FIX, eax GET_NEXTPRE1 ret + +pop_ds_pe: push offset pop_ds_base + jmp i286x_selector } } @@ -1686,13 +1776,8 @@ I286 _insb(void) { // 6C: insb __asm { GET_NEXTPRE1 I286CLOCK(5) -#if 1 movzx ecx, I286_DX call iocore_inp8 -#else - mov cx, I286_DX - call i286_in -#endif mov dl, al movzx ecx, I286_ES shl ecx, 4 @@ -1733,13 +1818,8 @@ I286 _outsb(void) { // 6E: outsb mov dl, al STRING_DIR add I286_SI, ax -#if 1 movzx ecx, I286_DX jmp iocore_out8 -#else - mov cx, I286_DX - jmp i286_out -#endif } } @@ -2410,23 +2490,24 @@ I286 mov_seg_ea(void) { // 8E: mov GET_NEXTPRE2 mov ax, word ptr I286_REG[edi*2] jmp segset - align 16 + align 4 src_memory: I286CLOCK(5) call p_ea_dst[eax*4] call i286_memoryread_w segset: mov word ptr I286_SEGREG[ebp], ax - and eax, 0000ffffh + movzx eax, ax + test I286_MSW, MSW_PE + jne short mov_seg_pe shl eax, 4 // make segreg - mov SEG_BASE[ebp*2], eax +mov_seg_base: mov SEG_BASE[ebp*2], eax sub ebp, 2*2 - jc segsetr + jc short segsetr mov SS_FIX[ebp*2], eax - je setss + je short setss segsetr:ret - align 16 setss: cmp i286core.s.prefix, 0 // 00/05/13 je noprefix pop eax @@ -2435,9 +2516,10 @@ I286 mov_seg_ea(void) { // 8E: mov movzx eax, bl jmp i286op[eax*4] - align 16 - fixcs: - INT_NUM(6) +mov_seg_pe: push offset mov_seg_base + jmp i286x_selector + + fixcs: INT_NUM(6) } } @@ -3303,7 +3385,7 @@ I286 les_r16_ea(void) { // C4: les shl eax, 4 // make segreg mov ES_BASE, eax ret - align 16 + align 4 src_register: INT_NUM(6) } @@ -3564,15 +3646,13 @@ I286 int_data8(void) { // CD: int I286 _into(void) { // CE: into __asm { + I286CLOCK(4) test I286_FLAG, O_FLAG jne intovf - I286CLOCK(4) GET_NEXTPRE1 ret - align 16 - intovf: - I286CLOCK(24) - INT_NUM(4) + + intovf: INT_NUM(4) } } @@ -3789,9 +3869,8 @@ nzflagsed: xor al, ah or I286_FLAGL, al GET_NEXTPRE2 ret - align 16 - div0: - INT_NUM(0) + + div0: INT_NUM(0) } } @@ -3935,15 +4014,11 @@ I286 in_al_data8(void) { // E4: in I286CLOCK(5) lea eax, [esi + 2] add eax, CS_BASE - mov i286core.s.inport, eax + mov I286_INPADRS, eax movzx ecx, bh -#if 1 call iocore_inp8 -#else - call i286_in -#endif mov I286_AL, al - mov i286core.s.inport, 0 + mov I286_INPADRS, 0 GET_NEXTPRE2 ret } @@ -3972,12 +4047,8 @@ I286 out_data8_al(void) { // E6: ou GET_NEXTPRE2 pop ecx mov dl, I286_AL -#if 1 jmp iocore_out8 -#else - jmp i286_out -#endif - } + } } I286 out_data8_ax(void) { // E7: out DATA8, ax @@ -4052,13 +4123,8 @@ I286 in_al_dx(void) { // EC: in al __asm { I286CLOCK(5) -#if 1 movzx ecx, I286_DX call iocore_inp8 -#else - mov cx, I286_DX - call i286_in -#endif mov I286_AL, al GET_NEXTPRE1 ret @@ -4082,15 +4148,9 @@ I286 out_dx_al(void) { // EE: out __asm { GET_NEXTPRE1 I286CLOCK(3) -#if 1 movzx ecx, I286_DX mov dl, I286_AL jmp iocore_out8 -#else - mov cx, I286_DX - mov dl, I286_AL - jmp i286_out -#endif } }