started msx1

2018-11-19 13:58:16 -05:00 · 2018-11-19 13:58:16 -05:00 · a1aa24f2e8
parent 43ac950a52
commit a1aa24f2e8
1 changed files with 36 additions and 0 deletions
--- a/presets/msx/helloworld.asm
+++ b/presets/msx/helloworld.asm
@ -0,0 +1,36 @@
+
+; Hello World example
+
+; ROM routine for character output
+CHPUT:  equ $00A2
+
+; waste space @ 0x0000 - 0x3fff
+	org 0x0000        
+        db 0
+        ds 0x3fff
+        
+; MSX cartridge header @ 0x4000 - 0x400f
+	dw 0x4241
+        dw Init
+        dw Init
+        dw 0
+        dw 0
+        dw 0
+        dw 0
+        dw 0
+
+; initialize and print message
+Init:
+    ld hl, msg
+    call puts
+    jp Init	; loop forever
+puts:               ; print 0-terminated string in HL
+    ld a,(hl)
+    or a
+    ret z
+    call CHPUT      ; displays one character in A
+    inc hl
+    jr puts
+
+; ASCII message + CR LF
+msg:    defm "Hello, world!",13,10,0