From ab4ac6e89c3d7bc709f71dc8e707d6e9feaea14c Mon Sep 17 00:00:00 2001
From: Moon <moon@shipoclu.com>
Date: Sun, 24 Jul 2022 17:34:51 -0700
Subject: [PATCH] initial commit

---
 helloworld.asm | 41 +++++++++++++++++++++++++++++++++++++++++
 make.sh        |  3 +++
 2 files changed, 44 insertions(+)
 create mode 100644 helloworld.asm
 create mode 100755 make.sh

diff --git a/helloworld.asm b/helloworld.asm
new file mode 100644
index 0000000..5f4b783
--- /dev/null
+++ b/helloworld.asm
@@ -0,0 +1,41 @@
+KERNAL_CLEAR_SCREEN = $e544 ; KERNAL ROM routine.
+VICSCN              = $0400 ; VIC-II Screen Video Matrix, 1024 (int).
+* = $8000
+ 
+     .word coldstart            ; coldstart vector
+     .word warmstart            ; warmstart vector
+     .byte $C3,$C2,$CD,$38,$30  ; "CBM8O". Autostart string
+ 
+coldstart
+     sei
+     stx $d016
+     jsr $fda3 ;Prepare IRQ
+     jsr $fd50 ;Init memory. Rewrite this routine to speed up boot process.
+     jsr $fd15 ;Init I/O
+     jsr $ff5b ;Init video
+     cli
+ 
+warmstart
+; Insert your code here
+     jsr KERNAL_CLEAR_SCREEN
+
+     ; read string by byte into vram until null byte
+     ldx #0
+loop
+     lda my_string,x
+     cmp #$00
+     beq bail
+     sta VICSCN,x
+     inx
+     jmp loop
+bail
+     ; pretty colors
+     inc $d020
+     jmp *-3
+
+.enc "screen"
+my_string .null "HELLO WORLD!"
+.enc "none"
+ 
+* = $9fff                     ; fill up to 8k or cartconv will fail
+     .byte 0
diff --git a/make.sh b/make.sh
new file mode 100755
index 0000000..f756c8f
--- /dev/null
+++ b/make.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+64tass helloworld.asm -o helloworld.prg
+cartconv -t normal -n "Hello World" -i helloworld.prg -o helloworld.crt