From 816d6999a1894552c1fec4f4bb895679bd8486d4 Mon Sep 17 00:00:00 2001
From: Vince Weaver <vince@deater.net>
Date: Sun, 4 Mar 2018 23:09:32 -0500
Subject: [PATCH] mode7_demo: setup LZ4 compression code

only saves 1k or so currently
---
 mode7_demo/Makefile           | 17 ++++++++++++++++-
 mode7_demo/README.mode7_demo  |  4 ++++
 mode7_demo/TODO               |  2 ++
 mode7_demo/mode7_decompress.s | 22 ++++++++++++++++++++++
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 mode7_demo/mode7_decompress.s

diff --git a/mode7_demo/Makefile b/mode7_demo/Makefile
index 01914690..a46a223e 100644
--- a/mode7_demo/Makefile
+++ b/mode7_demo/Makefile
@@ -9,11 +9,26 @@ all:	mode7_demo.dsk
 $(DOS33):	
 	cd ../dos33fs-utils && make
 
-mode7_demo.dsk:	$(DOS33) MODE7_DEMO
+mode7_demo.dsk:	$(DOS33) MODE7_DEMO MODE7_DEMO_C
 	$(DOS33) -y mode7_demo.dsk BSAVE -a 0x2000 MODE7_DEMO
+	$(DOS33) -y mode7_demo.dsk BSAVE -a 0x1000 MODE7_DEMO_C
 
 
 
+###
+
+MODE7_DEMO_C:	mode7_decompress.o
+	ld65 -o MODE7_DEMO_C mode7_decompress.o -C ../linker_scripts/apple2_1000.inc
+
+mode7_decompress.o:	mode7_decompress.s MODE7_DEMO.lz4 \
+		../asm_routines/lz4_decode.s \
+		zp.inc
+	ca65 -o mode7_decompress.o mode7_decompress.s
+
+
+MODE7_DEMO.lz4:	MODE7_DEMO
+	lz4 -f -16 MODE7_DEMO
+
 ###
 
 MODE7_DEMO:	mode7_demo.o
diff --git a/mode7_demo/README.mode7_demo b/mode7_demo/README.mode7_demo
index a3e0df55..52ba21ec 100644
--- a/mode7_demo/README.mode7_demo
+++ b/mode7_demo/README.mode7_demo
@@ -1,3 +1,7 @@
+Plan:
+	Load at $1000
+	Decompress to $2000
+
 Memory Map
 ==========
 
diff --git a/mode7_demo/TODO b/mode7_demo/TODO
index 417840e6..235f9ddf 100644
--- a/mode7_demo/TODO
+++ b/mode7_demo/TODO
@@ -6,3 +6,5 @@
 + Hide VMW logo in binary when loading
 + Improve the starfield demo
 
++ Centering in the credits
+
diff --git a/mode7_demo/mode7_decompress.s b/mode7_demo/mode7_decompress.s
new file mode 100644
index 00000000..e457afa3
--- /dev/null
+++ b/mode7_demo/mode7_decompress.s
@@ -0,0 +1,22 @@
+; Note: needs some extra work
+; Set up initial pointer
+; Skip/strip the LZ4 header
+
+.include "zp.inc"
+
+UNPACK_BUFFER	EQU	$2000
+
+start:
+	jsr	lz4_decode
+
+	jmp	$2000
+
+;===============================================
+; External modules
+;===============================================
+
+.include "../asm_routines/lz4_decode.s"
+
+data:
+.incbin	"MODE7_DEMO.lz4"
+