9 Nov
2007
9 Nov
'07
2:17 p.m.
On Fri, Nov 09, 2007 at 04:54:18PM -0500, Bryan Pope wrote:
I've had a PET with 16x 4116s since 1978, or are you picking on the CBM/PET
labelling change?
I know C= made
static PETs with 2316s and 2114s, but I've never seen one.
All the chiclet-keyboard PETs I've personally laid hands on had 6540s and
6550s. Does anyone have any sort of stats for how many static PETs were
made after the switch? And didn't C= offer 8K dynamic PETs for a short
time? (16 x 4Kbit DRAMs)
DRAM!? In a PET?! That is crazy talk! ;) There was never even DRAM in the C64...
What do you call 4164s? (though the C-64/e switched to a pair of 4464s).
The VIC-20 was always static, though (5K of 2114s).
I can't find any schematics of PETs on zimmers.net
(used to be one funet)
that use DRAMs...
Static PET (6550s or 2114s)
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001/index.…
Dynamic PET (2001-N)
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001N/index…
DRAM schematic
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001N/32034…
"Universal" PET (40-col, 80-col CTRC...)
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/univ/index.…
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 9-Nov-2007 at 22:00 Z
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Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html
