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Listing 53

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Joseph Ferano 2025-03-22 15:09:00 +07:00
parent da78d875c1
commit ab2b107e7e
2 changed files with 70 additions and 0 deletions
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35
asm_files/list-0053.asm Normal file
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; ========================================================================
;
; (C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
;
; This software is provided 'as-is', without any express or implied
; warranty. In no event will the authors be held liable for any damages
; arising from the use of this software.
;
; Please see https://computerenhance.com for further information
;
; ========================================================================
; ========================================================================
; LISTING 53
; ========================================================================
bits 16
mov dx, 6
mov bp, 1000
mov si, 0
init_loop_start:
mov word [bp + si], si
add si, 2
cmp si, dx
jnz init_loop_start
mov bx, 0
mov si, dx
sub bp, 2
add_loop_start:
add bx, word [bp + si]
sub si, 2
jnz add_loop_start

35
asm_files/list-0053.txt Normal file
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--- test\listing_0053_add_loop_challenge execution ---
mov dx, 6 ; dx:0x0->0x6 ip:0x0->0x3
mov bp, 1000 ; bp:0x0->0x3e8 ip:0x3->0x6
mov si, 0 ; ip:0x6->0x9
mov word [bp+si], si ; ip:0x9->0xb
add si, 2 ; si:0x0->0x2 ip:0xb->0xe
cmp si, dx ; ip:0xe->0x10 flags:->CPAS
jne $-7 ; ip:0x10->0x9
mov word [bp+si], si ; ip:0x9->0xb
add si, 2 ; si:0x2->0x4 ip:0xb->0xe flags:CPAS->
cmp si, dx ; ip:0xe->0x10 flags:->CAS
jne $-7 ; ip:0x10->0x9
mov word [bp+si], si ; ip:0x9->0xb
add si, 2 ; si:0x4->0x6 ip:0xb->0xe flags:CAS->P
cmp si, dx ; ip:0xe->0x10 flags:P->PZ
jne $-7 ; ip:0x10->0x12
mov bx, 0 ; ip:0x12->0x15
mov si, dx ; ip:0x15->0x17
sub bp, 2 ; bp:0x3e8->0x3e6 ip:0x17->0x1a flags:PZ->
add bx, [bp+si] ; bx:0x0->0x4 ip:0x1a->0x1c
sub si, 2 ; si:0x6->0x4 ip:0x1c->0x1f
jne $-5 ; ip:0x1f->0x1a
add bx, [bp+si] ; bx:0x4->0x6 ip:0x1a->0x1c flags:->P
sub si, 2 ; si:0x4->0x2 ip:0x1c->0x1f flags:P->
jne $-5 ; ip:0x1f->0x1a
add bx, [bp+si] ; ip:0x1a->0x1c flags:->P
sub si, 2 ; si:0x2->0x0 ip:0x1c->0x1f flags:P->PZ
jne $-5 ; ip:0x1f->0x21
Final registers:
bx: 0x0006 (6)
dx: 0x0006 (6)
bp: 0x03e6 (998)
ip: 0x0021 (33)
flags: PZ