From d8b3ca9d02377cf04a09e0f518a3385b7324bc4d Mon Sep 17 00:00:00 2001
From: Raymaekers Luca <luca@spacehb.net>
Date: Sun, 19 Oct 2025 23:03:20 +0200
Subject: checkpoint

---
 .../listing_0053_add_loop_challenge                | Bin 0 -> 33 bytes
 .../listing_0053_add_loop_challenge.asm            |  35 ++++++++++++++++++++
 .../listing_0053_add_loop_challenge.txt            |  36 +++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 src/data/simulating_memory/listing_0053_add_loop_challenge
 create mode 100644 src/data/simulating_memory/listing_0053_add_loop_challenge.asm
 create mode 100644 src/data/simulating_memory/listing_0053_add_loop_challenge.txt

(limited to 'src/data/simulating_memory')

diff --git a/src/data/simulating_memory/listing_0053_add_loop_challenge b/src/data/simulating_memory/listing_0053_add_loop_challenge
new file mode 100644
index 0000000..0678532
Binary files /dev/null and b/src/data/simulating_memory/listing_0053_add_loop_challenge differ
diff --git a/src/data/simulating_memory/listing_0053_add_loop_challenge.asm b/src/data/simulating_memory/listing_0053_add_loop_challenge.asm
new file mode 100644
index 0000000..f1ec802
--- /dev/null
+++ b/src/data/simulating_memory/listing_0053_add_loop_challenge.asm
@@ -0,0 +1,35 @@
+; ========================================================================
+;
+; (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
diff --git a/src/data/simulating_memory/listing_0053_add_loop_challenge.txt b/src/data/simulating_memory/listing_0053_add_loop_challenge.txt
new file mode 100644
index 0000000..79ead2b
--- /dev/null
+++ b/src/data/simulating_memory/listing_0053_add_loop_challenge.txt
@@ -0,0 +1,36 @@
+--- 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
+
-- 
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