fix stack pointer

outercloudstudio · outercloudstudio · commit 14aec1605e24 · 2026-03-08T03:11:45.000-04:00
diff --git a/README.md b/README.md
@@ -136,4 +136,4 @@ nix-shell -p imagemagick --run "convert frame.ppm frame.png"
 
 python convert.py
 
-python.exe .\load_program.py .\programs\test.hex --port COM6 
+python.exe .\load_program.py .\programs\test.hex --port COM6
diff --git a/programs/hello.c b/programs/hello.c
@@ -1,6 +1,6 @@
 __attribute__((naked)) void _start(void) {
     __asm__ volatile(
-        "li sp, 0x8000\n"  // top of 32KB RAM
+        "li sp, 0x4000\n"  // top of 32KB RAM
         "call main\n"
         "loop: j loop\n");
 }
diff --git a/programs/hello.hex b/programs/hello.hex
@@ -1,4 +1,4 @@
-00008137
+00004137
 00c000ef
 0000006f
 00000013
diff --git a/programs/hello.s b/programs/hello.s
@@ -10,7 +10,7 @@
 _start:
  #APP
 # 2 "./programs/hello.c" 1
-	li sp, 0x8000
+	li sp, 0x4000
 call main
 loop: j loop
 

Original file line number	Diff line number	Diff line change
`@@ -136,4 +136,4 @@ nix-shell -p imagemagick --run "convert frame.ppm frame.png"`
`136`	`136`
`137`	`137`	`python convert.py`
`138`	`138`
`139`		`-python.exe .\load_program.py .\programs\test.hex --port COM6`
	`139`	`+python.exe .\load_program.py .\programs\test.hex --port COM6`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`__attribute__((naked)) void _start(void) {`
`2`	`2`	`__asm__ volatile(`
`3`		`- "li sp, 0x8000\n" // top of 32KB RAM`
	`3`	`+ "li sp, 0x4000\n" // top of 32KB RAM`
`4`	`4`	`"call main\n"`
`5`	`5`	`"loop: j loop\n");`
`6`	`6`	`}`