Listing 46

asm_files/list-0046.asm

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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 46
+; ========================================================================
+
+bits 16
+
+mov bx, -4093
+mov cx, 3841
+sub bx, cx
+
+mov sp, 998
+mov bp, 999
+cmp bp, sp
+
+add bp, 1027
+sub bp, 2026

asm_files/list-0046.txt

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+--- test\listing_0046_add_sub_cmp execution ---
+mov bx, 61443 ; bx:0x0->0xf003 
+mov cx, 3841 ; cx:0x0->0xf01 
+sub bx, cx ; bx:0xf003->0xe102 flags:->S 
+mov sp, 998 ; sp:0x0->0x3e6 
+mov bp, 999 ; bp:0x0->0x3e7 
+cmp bp, sp ; flags:S-> 
+add bp, 1027 ; bp:0x3e7->0x7ea 
+sub bp, 2026 ; bp:0x7ea->0x0 flags:->PZ 
+
+Final registers:
+      bx: 0xe102 (57602)
+      cx: 0x0f01 (3841)
+      sp: 0x03e6 (998)
+      ax: 0x0000 (0)
+      bp: 0x0000 (0)
+      dx: 0x0000 (0)
+      si: 0x0000 (0)
+      di: 0x0000 (0)
+      es: 0x0000 (0)
+      ss: 0x0000 (0)
+      cs: 0x0000 (0)
+      ds: 0x0000 (0)
+   flags: PZ