MagerValp wrote: > I picked up what I thought was a PET 2001 at a local flea market > today. Now that I'm home I realize that it's a PET 200, aka 8032-SK, > with a dual 8050 disk drive and an 8023P printer, complete with all > cables and in perfect working condition. This is great :) A few > questions that some of you may be able to answer: Pretty lucky! :-)) > What kind of disks should I use in the 8050? Are normal 5.25" 48 TPI > DSDD disks OK? It formatted them OK but I haven't done any real > testing. How many blocks free are there? I don't have time to look at the manuals, but I think this is a 500k single-sided double-drive thing? There has been discussion going on about that recently, and the conclusion was something like the high density is not working (obviously...), and that actually higher-than-double (what was the abbreviation again?) should be used, but... I would try DD disks. > With it came manuals for the disk drive, the printer and BASIC 4.0, > but no documentation for the main unit (you know, the "plug in that > cable there" manual :). Is that manual missing? Cool. I don't know if something's missing. Are there electronic versions of those docs? Could you make them? > Which chip is used for generating the display? 6545? I couldn't find > one on the motherboard, but I didn't look very hard. There was a > hitachi IC called HD46505 -- could this be it? It's a 6545 or 6845 CRTC. See http://www.tu-chemnitz.de/~fachat/8bit/hardware/chips/6845/index.html for the Motorola 6845 docs. > Whas there ever a PET Programmers Reference Guide? If so, does > anyone on the list have a copy of it? The BASIC is in general CBM Basic 2.0 (like the C64) plus the Basic 4 extensions (disk basic, DLOAD, DSAVE etc, you have the manual) The hardware description can be seen in the PETdoc file of the VICE PET emulator - the just released version emulates 2001-8296 PETs. I am also preparing an index to PET documentation which should be out soon too. > There appears to be two casette interfaces -- is this the case? > Hardly useful, is it? Well. The first PET had a builtin tape, so I assume they provided a second interface for external (and probably much different) tape devices. This has been kept till the 8296. Andre -- Email address may be invalid. Use "fachat AT physik DOT tu-chemnitz DOT de" ------Fight SPAM - join CAUCE http://www.cauce.org------Thanks, spammers... Andre Fachat, Institute of physics, Technische Universitšt Chemnitz, FRG http://www.tu-chemnitz.de/~fachat
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