From: Lukas Krickl <lukas@krickl.dev>
Date: Tue, 8 Apr 2025 18:04:38 +0000 (+0200)
Subject: simulation: Added cell update loop
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=33b120016afb87dfe906d82bd7a90621b91f3c04;p=gbrg%2F.git

simulation: Added cell update loop
---

diff --git a/src/macros.inc b/src/macros.inc
index 4f42bbb..8c80e81 100644
--- a/src/macros.inc
+++ b/src/macros.inc
@@ -35,6 +35,9 @@
 
 #define NEGATE -1 & 0xFF
 
+#define LO & 0xFF
+#define HI >> 4 & 0xFF
+
 #macro dblo 
 .db $1 & 0xFF
 #endmacro 
@@ -153,3 +156,4 @@
   .str $1
   .db 0
 #endmacro
+
diff --git a/src/simulation.s b/src/simulation.s
index 3cc9487..fb84203 100644
--- a/src/simulation.s
+++ b/src/simulation.s
@@ -20,10 +20,18 @@ sim_update:
   ; later we want a limit 
   ld de, state_cells
 @loop:
-    
-    ; jp nz, @loop
-    
 
+    ; advance to next cell
+    .rep i, c_size, 1, inc de
+   
+    ; check if we need to exit
+    ld a, state_cells_end LO
+    cp a, e
+    jp nz, @loop
+    ld a, state_cells_end HI
+    cp a, d
+    jp nz, @loop
+    
   ; finally store cell ptr
   ld e, a
   ld [cell_ptr], a