erd@tut.cis.ohio-state.edu (Ethan R. Dicks) (02/29/88)
I am doing a project with a PET 8032 as a slave terminal over the IEEE-488 bus and need to cut my own boot ROM. I got this used 8032 in a clearance from Battelle Memorial Institute surplus, with no documentation. I need an explanation of the CRT controller chip so I can implement my own $F000 rom to do what I need it to, and not start up PET BASIC. Thanks, -ethan -- Ethan R. Dicks | ###### This signifies that the poster is a member in 2433 N. Fourth St| ## good sitting of Inertia House: Bodies at rest. Columbus OH 43202| ## (614) 262-0461 | ###### "You get it, you're closer."
Geoffrey_Welsh@watmath.waterloo.edu (03/02/88)
> From: erd@tut.cis.ohio-state.edu (Ethan R. Dicks) > Message-ID: <7386@tut.cis.ohio-state.edu> > Date: 29 Feb 88 04:22:23 GMT > I am doing a project with a PET 8032 as a slave terminal over the IEEE-488 > bus and need to cut my own boot ROM. I got this used 8032 in a clearance > from Battelle Memorial Institute surplus, with no documentation. I need > an explanation of the CRT controller chip so I can implement my own > $F000 rom to do what I need it to, and not start up PET BASIC Ethan: The CRT controller in the PET "fat" 4016/32, CBM 8016/32, CBM 8096 and SP9000 was just a Motorola MC6845 (the same device used by IBM MDA and CGA cards, I believe). Contact Motorola for chip specs and application notes. The settings in the PET's ROMs are a good place to start. Geoff ( watmath!fido!221.171!izot ) --- ConfMail V3.31 * Origin: The Waterloo Window: WOC's out there? (1:221/171)
fred@cbmvax.UUCP (Fred Bowen) (03/07/88)
erd@tut.cis.ohio-state.edu (Ethan R. Dicks) writes: > I need an explanation of the CRT controller chip so I can implement my own > $F000 rom to do what I need it to, and not start up PET BASIC. The CRT controller used in the 8032 is a common 6545, whose two registers, address and data, appear at $E880 and $E881 in the 8032 memory map. It should be pretty easy to locate information for this device- one such book is the CRT Controller Handbook by G.Kane, published by Osborn/McGraw Hill (ISBN 0-931988-45-4). -- -- Fred Bowen uucp: {ihnp4|rutgers|caip}!cbmvax!fred arpa: cbmvax!fred@RUTGERS.EDU tele: 215 431-9100 Commodore Electronics, Ltd., 1200 Wilson Drive, West Chester, PA, 19380