Ruud has just brought his SuperPET here for research. Preliminary observations: - Some keys on the keyboard don't work. This makes typing commands a bit difficult. Can one clean the keyboard by taking it apart or is this likely to be more difficult? I do have some other 8032-type PETs whose keyboard I could swap in. - Inside there is the single-board version of the SuperPET expansion. No separate 6702 board. - Initial value of EFE0-EFE3: D6. - From (a remark on) the schematic at zimmers.net (http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/SuperPET/324055.gif) it appeared that the 6702 might be addressable on all addresses EFex (where e is any even digit and x is any digit). This doesn't appear to be true, but the EFex and EFox (o for any odd digit) do read out differently. EFex seems to be FF (except for EFE0-EFE3) EFox seems to change on some occasions (possibly when EFE0 changes). - Reading from EFE0 doesn't change the previous value; the state of the dongle doesn't change on just reads. So far, it seems to change only when you write in a *different* value, that also isn't 00. -Olaf. -- ___ Olaf 'Rhialto' Seibert -- There's no point being grown-up if you \X/ rhialto/at/xs4all.nl -- can't be childish sometimes. -The 4th Doctor Message was sent through the cbm-hackers mailing listReceived on 2012-04-21 09:00:05
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