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Path: utzoo!mnetor!seismo!rutgers!cbmvax!fred
From: fred@cbmvax.cbm.UUCP (Fred Bowen)
Newsgroups: comp.sys.cbm
Subject: Re: Koalapic Memory Splitting on a C-128
Message-ID: <1789@cbmvax.cbmvax.cbm.UUCP>
Date: Wed, 29-Apr-87 19:21:37 EDT
Article-I.D.: cbmvax.1789
Posted: Wed Apr 29 19:21:37 1987
Date-Received: Sat, 2-May-87 05:28:49 EDT
References: <3598@garfield.UUCP>
Organization: Commodore Technology, West Chester, PA
Lines: 48

> Could someone tell me what parts of the [Koala] 40 block file go in what
> locations? Perhaps someone could send a sequence of commands for the MONITOR
> so I could load the file into memory, use the monitor to split up the sections
> of memory and resave the sections at their proper locations?

Koala pics are stored in a PGM type file with a load address of $6000.  You
can follow the steps below to break it up and display it on the C128.  I am
assuming you have both 40 and 80 column screens (doesn't everybody?) to look
at, else you will have to type blind or modify the procedure to suit:

	GRAPHIC 3,1		:REM  MULTICOLOR BITMAP
	BLOAD"picture name"
	MONITOR

	T 6000 7F3F 2000	:MOVE BITMAP
	T 7F40 8327 1C00	:MOVE VIDEO MATRIX

	>1 74			:SWITCH TO MC NYBBLE BANK
	T 8328 870F FD800	:MOVE COLOR NYBBLES (IGNORE ERRORS!)
	>1 75			:RESTORE TEXT NYBBLE BANK

	>8710			:GET EXT/BG COLOR BYTE, SPLIT INTO msb/lsb
	>FD020 msb lsb		:PUT EXT/BG COLORS
	
And that should do it- the picture on you VIC screen should be correct.  Now,
to save the pieces, type:

	S "pic.bitmap",8,2000,4000	:SAVE BITMAP CHUNK
	S "pic.vidmat",8,1C00,2000	:SAVE VIDEO MEM CHUNK
	>1 74				:SWITCH NYBBLE BANK
	S "pic.colnyb",8,FD800,FDC00	:SAVE COLOR NYB CHUNK
	>1 75				:RESTORE NYBBLE BANK

You can now reLOAD the pic anytime using the example BLOADs I posted so
many moons ago.  You have to figure out what to do with the border and
background colors though.  Just remember to twiddle the nybble bank when
you PEEK/POKE or LOAD/SAVE the color nybbles yourself.  Oh yeah, and
remember the color nybbles are in BANK 15 (I/O space)!

You guys at garfield are some real Koala phreaks, eh?
--
--
-- 
Fred Bowen			uucp:	{ihnp4|seismo|caip}!cbmvax!fred
				arpa:	cbmvax!fred@seismo.css.GOV
				tele:	215 431-9100

Commodore Electronics, Ltd.,  1200 Wilson Drive,  West Chester,  PA,  19380