>>>>> "Andre" == Andre Fachat <a.fachat@physik.tu-chemnitz.de> writes:
Andre> I am wondering, having found no hard facts for my petindex:
I took a good look at my 8032-SK's motherboard today, and it might
answer a few of your questions.
Andre> The 4032 machines (with the upgradable-to-8032 board? are there
Andre> 4032 without CRTC
My board has a CRTC (HD46505, presumably a renamed version of the 68/
6545) and four "jumpers" like this:
40 40 80
7 6 5
* * *
|
|
|
|
|
* * *
80
8*------------*
suggesting that resoldering these and changing the ROMs will give you
a 4032 with 2k of video memory.
Andre> What about the 8032? The reengineered schematics suggest it
Andre> being 2k, mirrored 2 times ($8000 and $8800).
My 8032-SK has 2k @ $8000 and open address space at @8800-8fff.
Andre> Another thing: the PET is supposed to be able to blank it's
Andre> screen with PIA1 CA2 (also used as IEEE EOI line). I assume
Andre> that this only works for non-CRTC machines, is this correct?
Well, nothing appears to happen on my 8032-SK.
--
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