2 Jun
2001
2 Jun
'01
6:27 a.m.
I've got an ELF-II.
Tiny basic was distibuted on cassette tape of poor quality, so it almost never
loaded correctly. As a result, I purchased the basic in ROM that uses the
MM57109 floating point chip.
I may have spare MM57109's, if you think about building an ELF-II under
the hood of an original ELF.
Bob Armstrong wrote:
I have some RCA COSMAC 18xx family parts, two 1802
and one 1806 CPUs, an
1861 PIXIE video (!!), a 1854 UART, and a few assorted support chips. I've
decided that the best use for them would be to build an updated Elf (I also
built the original Elf 25 years ago and have always had a soft spot for the
1802).
What software is out there that can run on the COSMAC? Does anybody have
a copy of Tiny BASIC or figForth for the 1802?
I have the original Popular Electronics Elf articles, but I'd like to have
a look at the schematics for the Quest or Netronics Elf versions too. Does
anybody have copies that they can share?
BTW, I have schematics and ROM listings for the original RCA VIP (CDP18S711),
RCA COSMAC Evaluation Kit (CDP18S020, including UT4) and the COSMAC Microboard
(CDP18S604), if anybody needs those.
Thanks,
Bob Armstrong