22 Apr
2000
22 Apr
'00
8 p.m.
A few years ago in a surplus store I found the RCA CMOS
databook that
contained (sketchy) specs for the 1801. However, the idiots were not
I have basic specs fot the pair, deeply burried though.
The databook indicated that the 1801 is a two-chip set,
which consists of
the CDP1801C and CDP1801R, the former containing the control circuitry and
that latter containing the registers. Apparently RCA designed it as a
production prototype, and did not intend it for commercial use, instead
recommending that customers design in the 1802 which was due out soon
thereafter.
Not quite true. the pair were used by special customers for quite a while
as they were by basic construction rad hard.
There were a few minor instruction differences as well, the 1801 had fewer
than the 02.
Allison
23 Apr
23 Apr
6:44 p.m.
I wrote:
The databook indicated that the 1801 is a two-chip
set, which consists of
the CDP1801C and CDP1801R, the former containing the control circuitry and
that latter containing the registers. Apparently RCA designed it as a
production prototype, and did not intend it for commercial use, instead
recommending that customers design in the 1802 which was due out soon
thereafter.
Allison wrote:
Not quite true. the pair were used by special
customers for quite a while
as they were by basic construction rad hard.
That's not inconsistent with what I wrote. Rad-hard parts are not considered
"commercial" use.
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