Rename listing files
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451
asm_files/list-0042.asm
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451
asm_files/list-0042.asm
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; ========================================================================
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;
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; (C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
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;
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; This software is provided 'as-is', without any express or implied
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; warranty. In no event will the authors be held liable for any damages
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; arising from the use of this software.
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;
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; Please see https://computerenhance.com for further information
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;
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; ========================================================================
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; ========================================================================
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; LISTING 42
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; ========================================================================
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;
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; NOTE(casey): This is not meant to be a real compliance test for 8086
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; disassemblers. It's just a reasonable selection of opcodes and patterns
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; to use as a first pass in making sure a disassembler handles a large
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; cross-section of the encoding. To be absolutely certain you haven't
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; missed something, you would need a more exhaustive listing!
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;
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bits 16
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mov si, bx
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mov dh, al
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mov cl, 12
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mov ch, -12
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mov cx, 12
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mov cx, -12
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mov dx, 3948
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mov dx, -3948
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mov al, [bx + si]
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mov bx, [bp + di]
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mov dx, [bp]
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mov ah, [bx + si + 4]
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mov al, [bx + si + 4999]
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mov [bx + di], cx
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mov [bp + si], cl
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mov [bp], ch
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mov ax, [bx + di - 37]
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mov [si - 300], cx
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mov dx, [bx - 32]
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mov [bp + di], byte 7
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mov [di + 901], word 347
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mov bp, [5]
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mov bx, [3458]
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mov ax, [2555]
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mov ax, [16]
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mov [2554], ax
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mov [15], ax
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push word [bp + si]
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push word [3000]
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push word [bx + di - 30]
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push cx
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push ax
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push dx
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push cs
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pop word [bp + si]
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pop word [3]
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pop word [bx + di - 3000]
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pop sp
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pop di
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pop si
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pop ds
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xchg ax, [bp - 1000]
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xchg [bx + 50], bp
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xchg ax, ax
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xchg ax, dx
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xchg ax, sp
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xchg ax, si
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xchg ax, di
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xchg cx, dx
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xchg si, cx
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xchg cl, ah
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in al, 200
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in al, dx
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in ax, dx
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out 44, ax
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out dx, al
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xlat
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lea ax, [bx + di + 1420]
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lea bx, [bp - 50]
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lea sp, [bp - 1003]
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lea di, [bx + si - 7]
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lds ax, [bx + di + 1420]
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lds bx, [bp - 50]
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lds sp, [bp - 1003]
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lds di, [bx + si - 7]
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les ax, [bx + di + 1420]
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les bx, [bp - 50]
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les sp, [bp - 1003]
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les di, [bx + si - 7]
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lahf
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sahf
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pushf
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popf
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add cx, [bp]
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add dx, [bx + si]
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add [bp + di + 5000], ah
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add [bx], al
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add sp, 392
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add si, 5
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add ax, 1000
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add ah, 30
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add al, 9
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add cx, bx
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add ch, al
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adc cx, [bp]
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adc dx, [bx + si]
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adc [bp + di + 5000], ah
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adc [bx], al
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adc sp, 392
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adc si, 5
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adc ax, 1000
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adc ah, 30
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adc al, 9
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adc cx, bx
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adc ch, al
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inc ax
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inc cx
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inc dh
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inc al
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inc ah
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inc sp
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inc di
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inc byte [bp + 1002]
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inc word [bx + 39]
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inc byte [bx + si + 5]
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inc word [bp + di - 10044]
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inc word [9349]
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inc byte [bp]
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aaa
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daa
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sub cx, [bp]
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sub dx, [bx + si]
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sub [bp + di + 5000], ah
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sub [bx], al
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sub sp, 392
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sub si, 5
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sub ax, 1000
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sub ah, 30
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sub al, 9
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sub cx, bx
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sub ch, al
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sbb cx, [bp]
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sbb dx, [bx + si]
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sbb [bp + di + 5000], ah
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sbb [bx], al
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sbb sp, 392
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sbb si, 5
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sbb ax, 1000
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sbb ah, 30
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sbb al, 9
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sbb cx, bx
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sbb ch, al
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dec ax
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dec cx
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dec dh
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dec al
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dec ah
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dec sp
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dec di
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dec byte [bp + 1002]
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dec word [bx + 39]
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dec byte [bx + si + 5]
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dec word [bp + di - 10044]
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dec word [9349]
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dec byte [bp]
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neg ax
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neg cx
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neg dh
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neg al
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neg ah
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neg sp
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neg di
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neg byte [bp + 1002]
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neg word [bx + 39]
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neg byte [bx + si + 5]
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neg word [bp + di - 10044]
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neg word [9349]
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neg byte [bp]
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cmp bx, cx
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cmp dh, [bp + 390]
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cmp [bp + 2], si
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cmp bl, 20
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cmp byte [bx], 34
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cmp ax, 23909
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aas
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das
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mul al
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mul cx
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mul word [bp]
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mul byte [bx + di + 500]
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imul ch
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imul dx
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imul byte [bx]
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imul word [9483]
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aam
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div bl
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div sp
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div byte [bx + si + 2990]
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div word [bp + di + 1000]
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idiv ax
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idiv si
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idiv byte [bp + si]
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idiv word [bx + 493]
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aad
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cbw
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cwd
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not ah
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not bl
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not sp
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not si
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not word [bp]
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not byte [bp + 9905]
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shl ah, 1
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shr ax, 1
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sar bx, 1
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rol cx, 1
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ror dh, 1
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rcl sp, 1
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rcr bp, 1
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shl word [bp + 5], 1
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shr byte [bx + si - 199], 1
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sar byte [bx + di - 300], 1
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rol word [bp], 1
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ror word [4938], 1
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rcl byte [3], 1
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rcr word [bx], 1
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shl ah, cl
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shr ax, cl
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sar bx, cl
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rol cx, cl
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ror dh, cl
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rcl sp, cl
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rcr bp, cl
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shl word [bp + 5], cl
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shr word [bx + si - 199], cl
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sar byte [bx + di - 300], cl
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rol byte [bp], cl
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ror byte [4938], cl
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rcl byte [3], cl
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rcr word [bx], cl
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and al, ah
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and ch, cl
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and bp, si
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and di, sp
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and al, 93
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and ax, 20392
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and [bp + si + 10], ch
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and [bx + di + 1000], dx
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and bx, [bp]
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and cx, [4384]
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and byte [bp - 39], 239
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and word [bx + si - 4332], 10328
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test bx, cx
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test dh, [bp + 390]
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test [bp + 2], si
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test bl, 20
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test byte [bx], 34
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test ax, 23909
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or al, ah
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or ch, cl
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or bp, si
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or di, sp
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or al, 93
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or ax, 20392
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or [bp + si + 10], ch
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or [bx + di + 1000], dx
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or bx, [bp]
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or cx, [4384]
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or byte [bp - 39], 239
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or word [bx + si - 4332], 10328
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xor al, ah
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xor ch, cl
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xor bp, si
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xor di, sp
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xor al, 93
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xor ax, 20392
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xor [bp + si + 10], ch
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xor [bx + di + 1000], dx
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xor bx, [bp]
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xor cx, [4384]
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xor byte [bp - 39], 239
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xor word [bx + si - 4332], 10328
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rep movsb
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rep cmpsb
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rep scasb
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rep lodsb
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rep movsw
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rep cmpsw
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rep scasw
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rep lodsw
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; NOTE(casey): Special thanks (as always!) to Mārtiņš Možeiko for figuring out why NASM
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; wouldn't compile "rep stds" instructions. It was because it was a misprint in the 8086
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; manual! It was really just "rep stos", which of course is still in x64, and NASM
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; assembles it just fine.
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rep stosb
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rep stosw
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call [39201]
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call [bp - 100]
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call sp
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call ax
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jmp ax
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jmp di
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jmp [12]
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jmp [4395]
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ret -7
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ret 500
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ret
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label:
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je label
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jl label
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jle label
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jb label
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jbe label
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jp label
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jo label
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js label
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jne label
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jnl label
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jg label
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jnb label
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ja label
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jnp label
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jno label
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jns label
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loop label
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loopz label
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loopnz label
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jcxz label
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int 13
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int3
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into
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iret
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clc
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cmc
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stc
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cld
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std
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cli
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sti
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hlt
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wait
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lock not byte [bp + 9905]
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lock xchg [100], al
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mov al, cs:[bx + si]
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mov bx, ds:[bp + di]
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mov dx, es:[bp]
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mov ah, ss:[bx + si + 4]
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and ss:[bp + si + 10], ch
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or ds:[bx + di + 1000], dx
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xor bx, es:[bp]
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cmp cx, es:[4384]
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test byte cs:[bp - 39], 239
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sbb word cs:[bx + si - 4332], 10328
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lock not byte CS:[bp + 9905]
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;
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; NOTE(casey): These were not in the original homework set, but have been added since, as people
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; found instruction encodings that were not previously covered. Thank you to everyone who
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; submitted test cases!
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;
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call 123:456
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jmp 789:34
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mov [bx+si+59],es
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jmp 2620
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call 11804
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retf 17556
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ret 17560
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retf
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ret
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call [bp+si-0x3a]
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call far [bp+si-0x3a]
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jmp [di]
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jmp far [di]
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jmp 21862:30600
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;
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; TODO(casey): I would like to uncomment this, but as far as I can tell, NASM doesn't recognize the ESC instruction :(
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; so even if I just force the assembler to output the bits here, our disasm will fail to assemble because it will (correctly!)
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; print the esc instruction and NASM will error because it doesn't know what that is.
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;
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; esc 938,ax
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;
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;
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; TODO(casey): According to NASM, "rep movsb" is "not lockable". However the 8086 manual seems to think it is, and
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; even describes what happens when you you lock a rep: the lock is held for the duration of the rep operation. So...
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; yeah. Not sure why this doesn't work in NASM:
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;
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; lock rep movsb
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;
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