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Last change
on this file was 197, checked in by chronos, 5 years ago |
- Modified: All parts of virtual machine have own form in Forms subdirectory.
- Modified: Main form moved to Forms subdirectory.
- Modified: TCpu class moved to UCpu unit.
- Added: Assembler and dissasembler forms.
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File size:
644 bytes
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| 1 | unit UInstructionReader;
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| 2 |
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| 3 | {$mode delphi}
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| 4 |
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| 5 | interface
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| 6 |
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| 7 | uses
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| 8 | Classes, SysUtils, UCpu;
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| 9 |
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| 10 | type
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| 11 |
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| 12 | { TInstructionReader }
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| 13 |
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| 14 | TInstructionReader = class
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| 15 | protected
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| 16 | public
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| 17 | Cpu: TCpu;
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| 18 | IP: Integer;
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| 19 | procedure Init;
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| 20 | function Read: T; inline;
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| 21 | function ReadSigned: T; inline;
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| 22 | end;
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| 23 |
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| 24 | implementation
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| 25 |
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| 26 | { TInstructionReader }
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| 27 |
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| 28 | procedure TInstructionReader.Init;
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| 29 | begin
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| 30 | IP := 0;
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| 31 | end;
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| 32 |
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| 33 | function TInstructionReader.Read: T;
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| 34 | begin
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| 35 | IP := IP + Result.ReadFromAddr(Pointer(NativeInt(Cpu.Memory) + IP));
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| 36 | end;
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| 37 |
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| 38 | function TInstructionReader.ReadSigned: T;
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| 39 | begin
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| 40 | IP := IP + Result.ReadFromAddr(Pointer(NativeInt(Cpu.Memory) + IP));
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| 41 | end;
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| 42 |
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| 43 | end.
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| 44 |
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