From e90775964374ba70ace179454ceb180cc4ef3d78 Mon Sep 17 00:00:00 2001
From: giomba <giomba@glgprograms.it>
Date: Sun, 4 Dec 2022 21:54:19 +0100
Subject: [PATCH] Add picture of a Christmas tree.

---
 res/tree.bin | Bin 0 -> 512 bytes
 src/main.asm |  44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 res/tree.bin

diff --git a/res/tree.bin b/res/tree.bin
new file mode 100644
index 0000000000000000000000000000000000000000..174a76722161d28712b8b0a36c23b8294fbebb74
GIT binary patch
literal 512
zcmY#TAOv_>g@hy(m^p+v38^GSUP}v`YCm5rqTznN;h4gHe!iHB13{vJ=!*S7qUef&
jN<pG%ih+V4QB=hsrC?Ds#R>{#rRa7I9sYkHU|;|M+pkOk

literal 0
HcmV?d00001

diff --git a/src/main.asm b/src/main.asm
index d596b4b..4362bb1 100644
--- a/src/main.asm
+++ b/src/main.asm
@@ -171,13 +171,53 @@ loading_feedback SUBROUTINE
     lda #$f2
     sta $325
 
+    ; wait for SPACE
 .chrin:
     jsr $ffe4
     cmp #$20
     bne .chrin
 
+    jsr copytree
+
     rts
 
+; draws a Christmas tree shamelessly copied from another demo
+copytree SUBROUTINE
+    lda #<tree_start
+    sta srcPointer
+    lda #>tree_start
+    sta srcPointer + 1
+
+    lda #$00
+    sta dstPointer
+    lda #$1e
+    sta dstPointer + 1
+
+    ldy #0
+.loop:
+    lda (srcPointer),y
+    sta (dstPointer),y
+
+    inc srcPointer
+    bne .noinc1
+    inc srcPointer + 1
+.noinc1:
+
+    inc dstPointer
+    bne .noinc2
+    inc dstPointer + 1
+.noinc2:
+
+    lda srcPointer
+    cmp #<tree_end
+    bne .loop
+    lda srcPointer + 1
+    cmp #>tree_end
+    bne .loop
+
+    rts
+
+
 message:
     BYTE #$0d,#$0d,"PLEASE WAIT 20 SEC",#$0d,"I'M JUST",#$0d,"AN OLD COMPUTER",#$0d,#0
 start_button_message:
@@ -190,6 +230,10 @@ demo_end:
 DEMO_LEN SET demo_end - demo_start
     ECHO DEMO_LEN
 
+tree_start:
+    .incbin "res/tree.bin"
+tree_end:
+
 . = $bff9
     jmp loading_feedback
 . = $bffc