Some think all 1802's use the SOS process, but I beleive that this is
not the case, its too expensive for
normal parts.
Some time back, I got a sample from an engineer at RCA, of a real
rad-hard 1802 with extra instructions
added to accelerate the Forth Kernel. I beleive that this is called
either an 1805, or perhaps an 1806.
So does anyone know what suffix is used to indicate the SOS process was
used on a given 180x chip?
J.C. Wren wrote:
> Using www.cosmacelf.com, there are dozens of sites devoted to the 1802.
>There are emulators for Windows, Palms, and probably *nix. In fact, just
>the other night I converted Frankasm to run under Linux (didn't take much,
>but I also went through the 1802 and base code, making prototypes
>modernized, and basically getting it to compiled with -W -Wall GCC flags).
>
> Misc items: The rad-hard version of the 1802 was saphirre on silicon, from
>what I've been told. You can pick up the RCA Studio II on eBay pretty
>cheap. These are 1802 based. There is the Netronics Elf, Quest Super Elf,
>and the RCA SA711 (I own 1 each of the latter, plus a couple of RCA Stdio
>II's). One day I stumbled across about 110 pieces of CDP1802ACEs in Austin
>Electronics. This got me on the 1802 kick, something I had always wanted to
>play with, but never got around to.
>
> It's a neat instruction set. Not perfect, but powerful. Lends itself to
>Forth quite well, and I imagine that a port of GCC to it wouldn't be
>outrageous (not compared to braindead architectures like the PIC, at any
>rate). Lots of nifty support chips. CDP1823 256x8 RAMS, CDP1861 video,
>there are port expanders, larger RAMs, ROMs, the CDP1854 serial chip (found
>9 boards on eBay, payed my board builder a couple bucks to desolder them
>all), some other stuff.
>
> Expect to pay dearly for databooks. I won't mentioned what I've spent
>lately, especially if Joe Rigdon won't (grin).
>
> --John
>
>
>-----Original Message-----
>From: cctalk-admin_at_classiccmp.org [mailto:cctalk-admin_at_classiccmp.org]On
>Behalf Of Ben Franchuk
>Sent: Monday, September 30, 2002 22:11
>To: cctalk_at_classiccmp.org
>Subject: Re: Attention 1802 fans...
>
>
>Ross Archer wrote:
>
>>The 1802 was used in quite a number of Amateur radio ("ham")
>>satellites.
>>It was one of the first relatively "rad-hard" micros from
>>what I remember
>>reading, due in large part to its CMOS construction. I
>>guess those days
>>there were a few PMOS CPUs (8008, 8080) and a few NMOS CPUs
>>(Z80, 6502,
>>9900JL), and exactly one CMOS CPU -- the CDP1802. So it was
>>1802 or bust. :)
>>
>The other CMOS chip at the time was the PDP-8 on a chip.
>The 1802 was I think was a special CMOS version that was
>latch up and rad-hardened. Several CPU's are rad-hard but
> the 1802 was the first cheap one.
>
>
>
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