Steve Another very brief look in the code there appears to be a lookup table from 9CC6 which if convert to ASCII refers to some of the special drawing characters (lines/corners etc) - the table gets analysed from code that starts from around L_991A: onwards which is looking at a Keypress for some reason B6 B4 B8 B2 B9 B7 B1 B3 B5 B0 AE AD etc. Any ideas as wonder what the purpose/application this board was designed for ? Andy > On 28 Aug 2017, at 17:34, Steve Gray <email@example.com <mailto:firstname.lastname@example.org>> wrote: > > Preliminary look at the ROM. At the start there is a giant jump table, so it looks like all the commands will be via SYS. > so: > > SYS to $9000, $9003, $9006 etc to see what happens. If you get syntax errors then you know there must be additional parameters IE: SYS $9000,X,Y etc > > An interesting board for sure. > > Steve > > > From: vossi <email@example.com <mailto:firstname.lastname@example.org>> > To: email@example.com <mailto:firstname.lastname@example.org> > Sent: Monday, August 28, 2017 10:16 AM > Subject: Re: Data Becker CBM-8000 hi-res graphics > > Hi Ruud and Steve, > it doesn't look like the supersoft board. > It's only the 6545 with some ttl's to access bitmap graphics instead of the > prebuild chars and the 16kb ram board. > I read the eprom and disassembled it short in the monitor. > It runs at $9000 and has several jumps for a lot of graphics subroutines in > the first bytes. > I think at $9000 is the init routine. > > Here are pics: > http://www.ceffy.de/cbm8000-grafik_001.jpg <http://www.ceffy.de/cbm8000-grafik_001.jpg> > http://www.ceffy.de/cbm8000-grafik_002.jpg <http://www.ceffy.de/cbm8000-grafik_002.jpg> > > And the rom-extension: http://www.ceffy.de/cbm8000.bin <http://www.ceffy.de/cbm8000.bin> > > @Ruud: Please send me the disassembly to email@example.com <mailto:firstname.lastname@example.org> > > Has anybody a 6502 disassembler for OSX ? > I tried DiStella - it works - but it's VCS2600 specific.... > > greets > > > > > -- > View this message in context: http://cbm-hackers.2304266.n4.nabble.com/Data-Becker-CBM-8000-hi-res-graphics-tp4663482p4663485.html <http://cbm-hackers.2304266.n4.nabble.com/Data-Becker-CBM-8000-hi-res-graphics-tp4663482p4663485.html> > > Sent from the cbm-hackers mailing list archive at Nabble.com <http://nabble.com/>. > > Message was sent through the cbm-hackers mailing list > > Message was sent through the cbm-hackers mailing listReceived on 2017-08-28 20:02:58
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