added method calling and for loops

1 files changed, 17 insertions, 11 deletions

diff --git a/ROMs/hello_c.asm b/ROMs/hello_c.asm
index e06d4e0..761f32b 100644
--- a/ROMs/hello_c.asm
+++ b/ROMs/hello_c.asm
@@ -1,17 +1,23 @@
-_main:
-    ; comment
-    mov 5, [$51FF]            ; int a = 5
+    jmp _main
+_add_int_a__int_b:            ; int add(int a, int b)
+    pop V0                    ; Pop return address to register, to preserve during parameter access
+    pop [$51FF]               ; param int a
+    pop [$5201]               ; param int b
+    push V0                   ; Restore function return address
     push [$51FF]              ; left operand
-    mov 5, V1                 ; right operand
+    mov [$5201], V1           ; right operand
     pop V0                    ; get left operand back
-    cmp V0, V1                ; compute equality check
-    bz LX                     ; check if condition
-    not
-    jmp _end_1                ; if succeeds, continue, else jump to end
-    mov 99, V0                ; return value
+    add V0, V1                ; compute addition
+    mov AX, V0                ; return value
     ret
-_end_1:
-    mov 0, V0                 ; return value
+    mov 0, V0                 ; fallback return 0
+    ret
+
+_main:                        ; int main()
+    push 2                    ; arg int a
+    push 1                    ; arg int b
+    call _add_int_a__int_b    ; int add(int a, int b)
+    mov V0, V0                ; return value
     ret
     mov 0, V0                 ; fallback return 0
     ret