ZXNet эхоконференция «zxnet.pc»

Hello, Vladimir Kladov

А вот это - реализация команд LDI/LDIR/LDD/LDDR. Разберитесь, если есть
желание.
┌─- CODE ───
@@_ld&direction.r; //; LDIR, LDDR
.IF (FastLDIR <> 0) and ("&LDIRHL" <> "")
CMP B[&ZX].DebuggerVisible, 0
JNZ @@_ld&direction.r_usual

MOVZX ECX, W[&ZX].Regs.Reg_BC
DEC ECX
JZ @@_ld&direction.r_usual
MOVZX EDX, W[&ZX].Regs.Reg_DE
MOV ECX, EBX
DEC CX
CMP CX, DX
JZ @@_ld&direction.r_usual
.if MemPtrNew
MOV [&ZX].reg_Hidden, CH
.endif
DEC CX
CMP CX, DX
JZ @@_ld&direction.r_usual
MOV EBX, ECX
PUSH EAX
.IF "&LDIRHL" = "BX"
PUSH EBX
.ENDIF
MOVZX &ELDIRHL, W[&ZX].Regs.Reg_HL
.IF GeneralSnd
ADD D[&ZX].TStatesToExecute, 16
.ENDIF
.IF MultiColor
MOV [&ZX].TempFlip, EDI
ADD D[&ZX].TempFlip, 256
.ENDIF
JMP SHORT @@_ld&direction.r_fast_next

@@_ld&direction.r_fast_loop;
.IF; RZX_play
ADD D[&ZX].NumFetches, 2
.ELSEIF GeneralSnd
INC D[&ZX].NumFetches
.ENDIF

.IF MultiColor
ADD B[&ZX].TactRCount, 2
.IF NoDelay
ADD EDI, 8
.ELSEIF "&LDIRHL" = "BX"
POP EAX
PUSH EAX
Delay Time=4, Mem=A, Temp=C
INC AX
Delay Time=4, Mem=A, Temp=C
.ELSE
Delay Time=4, Mem=B, Temp=C
INC BX
Delay Time=4, Mem=B, Temp=C
DEC BX
.ENDIF
.ELSEIF MultiColor = 0
ADD D[&ZX].TactRCount, $100002
AND W[&ZX].TactRCount, $7F
.ENDIF

@@_ld&direction.r_fast_next;
.IF; "&LDIRHL" = "BX"
Delay Time=3, Mem=B, Temp=C
GetMem1 Dest=AL, Addr=B, Temp=C, Gfx=mm0
.ELSE
MOV EAX, &ELDIRHL
Delay Time=3, Mem=A, Temp=C
GetMem1 Dest=AL, Addr=A, Temp=C, Gfx=mm0
.ENDIF
.IF Plus3 or NoDelay
Delay Time=5, Mem=D, Temp=C // задержка DE wr:5
.ELSE
Delay Time=3, Mem=D, Temp=C // задержка DE wr:3
DelayMore Temp=C, Count=2
.ENDIF
PutMem Addr=D, Reg=AL, Temp=C, Gfx=mm0
DEC W[&ZX].Regs.Reg_BC
JZ @@_ld&direction.r_fast_end_incRegs

.IF "&direction" = "i"
INC DX
INC &LDIRHL
.IF "&LDIRHL" = "BX"
CMP DX, [ESP]
.ELSE
AND &ELDIRHL, $FFFF
CMP DX, BX
.ENDIF
JZ SHORT @@_ld&direction.r_fast_fin
.IF MultiColor
CMP EDI, 60000
JGE SHORT @@_ld&direction.r_fast_fin
.ENDIF
.ELSE
DEC DX
DEC &LDIRHL
DEC DX
.IF "&LDIRHL" = "BX"
CMP DX, [ESP]
.ELSE
AND &ELDIRHL, $FFFF
CMP DX, BX
.ENDIF
JZ SHORT @@_ld&direction.r_fast_fin_INCDX
.IF MultiColor
CMP EDI, 60000
JGE SHORT @@_ld&direction.r_fast_fin_INCDX
.ENDIF
INC DX
.ENDIF

.IF MultiColor = 0
ADD W[&ZX].TactRCount + 2, 5
JS SHORT @@_ld&direction.r_fast_fin
.ELSE
.IF Plus3 or NoDelay
Delay Time=5, Mem=D, Temp=C // дополнительно 5 задержек DE:1
.ELSE
Delay Time=1, Mem=D, Temp=C // дополнительно 5 задержек DE:1
DelayMore Temp=C, Count=4
.ENDIF
.ENDIF

.IF GeneralSnd
SUB [&ZX].TStatesToExecute, 21
CMP [&ZX].TStatesToExecute, 21
JG @@_ld&direction.r_fast_loop
MOV ECX, [&ZX].NumFetches
CMP ECX, [&ZX].MaxFetches
JGE @@_ld&direction.r_fast_fin
.ELSEIF RZX_play
MOV ECX, [&ZX].NumFetches
CMP ECX, [&ZX].MaxFetches
JGE @@_ld&direction.r_fast_fin
.IF MultiColor
CMP B[EDI+MC_IntSignal_Table], 0
JNZ SHORT @@_ld&direction.r_fast_fin
.ENDIF
.ELSE
.IF MultiColor
CMP B[EDI+MC_IntSignal_Table], 0
JNZ SHORT @@_ld&direction.r_fast_fin
CMP EDI, [&ZX].TempFlip
JGE SHORT @@_ld&direction.r_fast_fin
.ELSE
.ENDIF
.ENDIF
JMP LONG @@_ld&direction.r_fast_loop

@@_ld&direction.r_fast_fin_INCDX;
INC; DX
@@_ld&direction.r_fast_fin; //; завершаем цикл быстрого LDIR по разным
причинам,
// кроме исчерпания Reg_BC
MOV ECX, &ELDIRHL
MOV [&ZX].Regs.Reg_HL, CX
MOV [&ZX].Regs.Reg_DE, DX
.IF "&LDIRHL" = "BX"
POP EBX
.ENDIF
POP ECX
MOV AH, CH

ADD AL, [&ZX].Reg_A // !!! формируем флажки X и Y !!!
.IF LDIR_BY_TABLE
AND EAX, $FFFF
MOV AX, W[EAX*2+Table_LDIR1]
.ELSE
// !!! формируем флажки X и Y !!!
MOV CL, AL
AND CL, 2
SAL CL, 4
AND AL, $F
OR AL, CL //-------------------------------
AND AH, not flag_H
.ENDIF
OR AH, flag_N or flag_P
NextInstr

@@_ld&direction.r_fast_end_incRegs; //; завершение быстрого LDIR по исчерпании
Reg_BC
.IF "&direction" = "i"
INC DX
INC &LDIRHL
.ELSE
DEC DX
DEC &LDIRHL
.ENDIF

@@_ld&direction.r_fast_end; //; завершение быстрого LDIR по исчерпании Reg_BC
.IF GeneralSnd
ADD D[&ZX].TStatesToExecute, 5
.ENDIF
MOV ECX, &ELDIRHL
MOV [&ZX].Regs.Reg_HL, CX
MOV [&ZX].Regs.Reg_DE, DX
.IF "&LDIRHL" = "BX"
POP EBX
.ENDIF
POP ECX
MOV AH, CH

ADD AL, [&ZX].Reg_A // !!! формируем флажки X и Y !!!
.IF LDIR_BY_TABLE
AND EAX, $FFFF
MOV AX, W[EAX*2+Table_LDIR1]
.ELSE
// !!! формируем флажки X и Y !!!
MOV CL, AL
AND CL, 2
SAL CL, 4
AND AL, $F
OR AL, CL //-------------------------------
AND AH, not (flag_P or flag_H)
.ENDIF
OR AH, flag_N
INC BX
INC BX
NextInstr

.ENDIF

@@_ld&direction.r_usual;
INC_TactRCount; Value=5, ReturnTStates=16, ReturnPC=2, ReturnR=2,
ReturnFetches=1
MOVZX ECX, W[&ZX].Regs.reg_HL
Delay Time=3, Mem=C // задержка HL:3
GetMem1 Dest=AL, Addr=C, Gfx=mm0
MOVZX ECX, W[&ZX].Regs.reg_DE
.IF Plus3 or NoDelay
Delay Time=5, Mem=C // задержка DE wr:5
.ELSE
Delay Time=3, Mem=C // задержка DE wr:3
DelayMore Count=2
.ENDIF
PutMem Addr=C, Reg=AL, Gfx=mm0
ADD AL, [&ZX].Reg_A // !!! формируем флажки X и Y !!!
.IF LDIR_BY_TABLE
AND EAX, $FFFF
MOV AX, W[EAX*2+Table_LDIR1]
.ELSE
// !!! формируем флажки X и Y !!!
MOV CL, AL
AND CL, 2
SAL CL, 4
AND AL, $F
OR AL, CL //-------------------------------
AND AH, not (flag_P or flag_H)
OR AH, flag_N
.ENDIF
MOVZX EDX, W[&ZX].Regs.reg_DE
.IF "&direction" = "i"
INC W[&ZX].Regs.reg_HL
INC W[&ZX].Regs.reg_DE
.ELSE
DEC W[&ZX].Regs.reg_HL
DEC W[&ZX].Regs.reg_DE
.ENDIF
DEC W[&ZX].Regs.reg_BC
JZ SHORT @@ld&direction.r_exit
.IF Plus3 or NoDelay
Delay Time=5, Mem=D // дополнительно 5 задержек DE:1
.ELSE
Delay Time=1, Mem=D // дополнительно 5 задержек DE:1
DelayMore Count=4
.ENDIF
OR AH, flag_P
DEC BX
.if MemPtrNew
MOV [&ZX].reg_Hidden, BH
.endif
DEC BX
@@ld&direction.r_exit;
NextInstr;
.ENDFOR //direction

└── CODE ───
я жебил, я не шерхан, хавал жёваны штаны...