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Tito Hinostroza
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@ -3,6 +3,7 @@
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Se eliminan algunos campos no usados, porque esta librería se ha creado a partir de la librería
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PicUtils que contiene más detalle en cuanto al hardware.
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Se corrige errores en el ejemplo de ensamblador.
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Se agregan registros adicionales de la CPU
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0.0
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===
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@ -132,11 +132,12 @@ type //Instructions set
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const //Constants of address and bit positions for some registers
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_STATUS = $03;
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_C = 0;
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_Z = 2;
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_RP0 = 5;
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_RP1 = 6;
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_Z = 1;
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_D = 3;
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_B = 4;
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_V = 6;
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_N = 7;
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// _IRP = 7;
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type
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{Objeto que representa al hardware de un PIC de la serie 16}
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@ -151,28 +152,27 @@ type
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private //Campos para procesar instrucciones
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function GetINTCON: byte;
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function GetINTCON_GIE: boolean;
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function GetSTATUS: byte;
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function GetSTATUS_C: boolean;
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function GetSTATUS_DC: boolean;
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function GetSTATUS_IRP: boolean;
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function GetSTATUS_N: boolean;
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function GetSTATUS_I: boolean;
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function GetSTATUS_Z: boolean;
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procedure SetINTCON_GIE(AValue: boolean);
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procedure SetSTATUS_C(AValue: boolean);
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procedure SetSTATUS_DC(AValue: boolean);
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procedure SetSTATUS_IRP(AValue: boolean);
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procedure SetSTATUS_N(AValue: boolean);
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procedure SetSTATUS_I(AValue: boolean);
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procedure SetSTATUS_Z(AValue: boolean);
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procedure SetFRAM(value: byte);
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function GetFRAM: byte;
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public //Campos que modelan a los registros internos
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public //Fields to modelate internal register (For Simulation)
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W : byte; //Registro de trabajo
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PC : TWordRec; //PC as record to fast access for bytes
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PCLATH : byte; //Contador de Programa H
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SP : byte; //Puntero de pila
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property STATUS: byte read GetSTATUS;
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SP : byte; //Stack Pointer
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SR : byte; //Status Register
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property STATUS: byte read SR;
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property STATUS_Z: boolean read GetSTATUS_Z write SetSTATUS_Z;
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property STATUS_C: boolean read GetSTATUS_C write SetSTATUS_C;
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property STATUS_DC: boolean read GetSTATUS_DC write SetSTATUS_DC;
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property STATUS_IRP: boolean read GetSTATUS_IRP write SetSTATUS_IRP;
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property STATUS_N: boolean read GetSTATUS_N write SetSTATUS_N;
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property STATUS_I: boolean read GetSTATUS_I write SetSTATUS_I;
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property INTCON: byte read GetINTCON;
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property INTCON_GIE: boolean read GetINTCON_GIE write SetINTCON_GIE;
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property FRAM: byte read GetFRAM write SetFRAM;
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@ -408,45 +408,41 @@ begin
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Result := i_Inval;
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end;
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//Campos para procesar instrucciones
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function TP6502.GetSTATUS: byte;
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begin
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Result := ram[_STATUS].dvalue;
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end;
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function TP6502.GetSTATUS_Z: boolean;
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begin
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Result := (ram[_STATUS].dvalue and %00000100) <> 0;
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Result := (SR and %00000010) <> 0;
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end;
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procedure TP6502.SetSTATUS_Z(AValue: boolean);
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begin
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if AVAlue then ram[_STATUS].dvalue := ram[_STATUS].dvalue or %00000100
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else ram[_STATUS].dvalue := ram[_STATUS].dvalue and %11111011;
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if AVAlue then SR := SR or %00000010
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else SR := SR and %11111101;
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end;
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function TP6502.GetSTATUS_C: boolean;
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begin
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Result := (ram[_STATUS].dvalue and %00000001) <> 0;
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Result := (SR and %00000001) <> 0;
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end;
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procedure TP6502.SetSTATUS_C(AValue: boolean);
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begin
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if AVAlue then ram[_STATUS].dvalue := ram[_STATUS].dvalue or %00000001
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else ram[_STATUS].dvalue := ram[_STATUS].dvalue and %11111110;
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if AVAlue then SR := SR or %00000001
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else SR := SR and %11111110;
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end;
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function TP6502.GetSTATUS_DC: boolean;
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function TP6502.GetSTATUS_N: boolean;
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begin
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Result := (ram[_STATUS].dvalue and %00000010) <> 0;
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Result := (SR and %10000000) <> 0;
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end;
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procedure TP6502.SetSTATUS_DC(AValue: boolean);
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procedure TP6502.SetSTATUS_N(AValue: boolean);
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begin
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if AVAlue then ram[_STATUS].dvalue := ram[_STATUS].dvalue or %00000010
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else ram[_STATUS].dvalue := ram[_STATUS].dvalue and %11111101;
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if AVAlue then SR := SR or %10000000
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else SR := SR and %01111111;
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end;
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function TP6502.GetSTATUS_IRP: boolean;
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function TP6502.GetSTATUS_I: boolean;
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begin
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Result := (ram[_STATUS].dvalue and %10000000) <> 0;
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Result := (SR and %00000100) <> 0;
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end;
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procedure TP6502.SetSTATUS_IRP(AValue: boolean);
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procedure TP6502.SetSTATUS_I(AValue: boolean);
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begin
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if AVAlue then ram[_STATUS].dvalue := ram[_STATUS].dvalue or %10000000
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else ram[_STATUS].dvalue := ram[_STATUS].dvalue and %01111111;
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if AVAlue then SR := SR or %00000100
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else SR := SR and %11111011;
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end;
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function TP6502.GetINTCON: byte;
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begin
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@ -731,7 +727,7 @@ begin
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end;
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STATUS_Z := (resWord and $ff) = 0;
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STATUS_C := (resWord > 255);
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STATUS_DC := (resNib > 15);
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STATUS_N := (resNib > 15);
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end;
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i_ANDWF: begin
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resByte := W and FRAM;
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@ -884,8 +880,8 @@ begin
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if resInt < 0 then STATUS_C := false //negativo
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else STATUS_C := true;
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resInt := (resByte and $0F) - (W and $0F);
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if resInt < 0 then STATUS_DC := false //negativo
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else STATUS_DC := true;
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if resInt < 0 then STATUS_N := false //negativo
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else STATUS_N := true;
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end;
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i_SWAPF: begin
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resByte := FRAM;
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@ -931,7 +927,7 @@ begin
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w := resWord and $FF;
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STATUS_Z := (resWord and $ff) = 0;
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STATUS_C := (resWord > 255);
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STATUS_DC := (resNib > 15);
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STATUS_N := (resNib > 15);
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end;
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i_ANDLW: begin
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resByte := W and K_;
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@ -1018,8 +1014,8 @@ begin
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if resInt < 0 then STATUS_C := false //negativo
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else STATUS_C := true;
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resInt := (k_ and $0F) - (W and $0F);
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if resInt < 0 then STATUS_DC := false //negativo
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else STATUS_DC := true;
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if resInt < 0 then STATUS_N := false //negativo
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else STATUS_N := true;
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end;
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i_XORLW: begin
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resByte := W xor k_;
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@ -1110,9 +1106,9 @@ var
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i: Integer;
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begin
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PC.W := 0;
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PCLATH := 0;
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W := 0;
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SP := $FF; //Posición inicial del puntero de pila
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SR := %00000100; //I -> 1
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nClck := 0; //Inicia contador de ciclos
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CommStop := false; //Limpia bandera
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if hard then begin
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@ -1121,7 +1117,6 @@ begin
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ram[i].dvalue := $00;
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end;
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end;
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ram[_STATUS].dvalue := %00011000; //STATUS
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end;
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function TP6502.ReadPC: dword;
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begin
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@ -1296,6 +1291,7 @@ procedure TP6502.GenHex(hexFile: string);
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Actualiza los campos, minUsed y maxUsed.}
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var
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i: Integer;
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f: file of byte;
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begin
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hexLines.Clear; //Se usará la lista hexLines
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//Prepara extracción de datos
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@ -1306,10 +1302,17 @@ begin
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if ram[i].used then begin
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if i<minUsed then minUsed := i;
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if i>maxUsed then maxUsed := i;
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hexLines.Add('poke ' + IntToStr(i) + ',' + IntToStr(ram[i].value));
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end;
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end;
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hexLines.SaveToFile(hexFile); //Genera archivo
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//Genera archivo PRG
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AssignFile(f, hexFile);
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Rewrite(f);
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Write(f, minUsed and $ff);
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Write(f, (minUsed >> 8) and $ff);
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for i := minUsed to maxUsed do begin //Llena buffer
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Write(f, ram[i].value);
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end;
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close(f);
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end;
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constructor TP6502.Create;
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begin
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