Initial skeletonHEADmaster

1 files changed, 54 insertions, 0 deletions

diff --git a/hardwire.asm b/hardwire.asm
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+++ b/hardwire.asm
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+; hardwire - Puzzle game for Atari VCS
+;
+; Copyright (C) 2025  Ian Cowburn (ianc@noddybox.demon.co.uk)
+;
+; This program is free software: you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 3 of the License, or
+; (at your option) any later version.
+;
+; This program is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+; GNU General Public License for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;
+; -------------------------------------------------------------------------
+;
+; Code
+;
+        processor       6502
+        option          output-file,hardwire.a26
+
+        include         vcs.asm
+
+        org             $f000
+
+        ; Set up stack pointer
+start:
+        sei
+        cld
+        ldx             #$ff
+        txs
+
+        ; Initialise page zero
+        lda             #0
+.zero:
+        sta             $0,x
+        dex
+        bne             zero
+
+        ; Set background
+        lda             #$3e
+        clc
+.loop:
+        sta             COLUBK
+        adc             #1
+        jmp             loop
+
+        ; Set start adresses and pad ROM
+        org             $fffc
+        word            start
+        word            start