Correct some terminology
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268bfcb843
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cbea508d91
12
emulator.pas
12
emulator.pas
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@ -14,7 +14,7 @@ var
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Addr, IP, RP: word; //Address argument and instruction and return pointers
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R: array [0 .. 3] of byte; //General-purpose registers
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Mem: array [0 .. $ffef] of byte; //Memory
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Prog{$ifdef printer}, Prn{$endif}{$ifdef tape}, TapeIn, TapeOut{$endif}: file of byte; //Program file, line printer, and punched tape reader and keypunch
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Prog{$ifdef printer}, Prn{$endif}{$ifdef tape}, TapeIn, TapeOut{$endif}: file of byte; //Program file, line printer, and punched tape reader and punch
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{$ifdef tape}
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TapePos: integer; //Punched tape reader position pointer
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{$endif}
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@ -127,13 +127,13 @@ begin
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else if Op = 9 then R [X] := R [X] xor R [Y]
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//Load
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else if Op = $a then begin
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//Dumb terminal input
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//Terminal input
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if Addr = IO then begin
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Ch := ReadKey;
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write (Ch); //Local echo
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R [X] := byte (Ch);
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end
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//Punched tape reader
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//Tape reader
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{$ifdef tape}
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else if Addr = $fffd then begin
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assign (TapeIn, 'tapein');
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@ -157,12 +157,12 @@ begin
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end
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//Store
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else if Op = $b then begin
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//Dumb terminal output
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//Terminal output
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if Addr = IO then begin
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Ch := ansichar (R [X]);
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write (Ch);
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end
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//Line printer
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//Printer
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{$ifdef printer}
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else if Addr = $fffe then begin
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assign (Prn, '/dev/usb/lp0');
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@ -174,7 +174,7 @@ begin
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end;
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end
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{$endif}
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//Punched tape keypunch
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//Tape punch
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{$ifdef tape}
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else if Addr = $fffd then begin
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assign (TapeOut, 'tapeout');
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@ -93,11 +93,11 @@ Arbitrary devices can be mapped to the other reserved addresses.
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The emulator can be compiled with support for a line printer at
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/dev/usb/lp0 with the argument -dprinter, and for an emulated punched
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tape reader and keypunch at tapein and tapeout respectively with -dtape.
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tape reader and punch at tapein and tapeout respectively with -dtape.
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The printer is mapped to address FFFE in the emulator and the tape
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reader and keypunch to FFFD. To reset the tape reader to the beginning
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of a tape, for example to change the tape, read once with no file at
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tapein. If you wish to use a different setup you have to modify the code
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reader and punch to FFFD. To reset the tape reader to the beginning of a
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tape, for example to change the tape, read once with no file at tapein.
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If you wish to use a different setup you have to modify the code
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yourself.
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Initial Program Loader
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