I want to bould my own PDP11 some day but in an other way as other people
here :-)
I want to build an Bit Slice CPU out of AM2901 Chips to emulate the
PDP11 CPU. As a prt of the design I'LL need some very fast Proms for the
microcode and I've found the AM27C291,TMS27C291 and CY7C291 Chips, they are
fast and big enough (2Kx8 and 25-35ns).
I'mm looking now for a data sheet from the CY7C291 that describes the
programming algorithm, getting a datasheet is easy on
http://www.datasheetarchive.com/ but there is this sentence in the text:
"Programming Information
Programming Support is available from Cypress as well as from a number of
third party software vendors. For detailed programming information,
including a listing of software packages, please see the PROM Programming
Information located at the end of this section. Programming algorithms can
be obtained from any Cypress repesentative."
Ok, so far so good.
I don't know of what end of which section I schould look for the
programming information, since I don't know from where the datasheet was
scanned from. I've contacted Cypress itself some time before..to make it
short: they failed.
The sold the entire Eprom bussines years agao (forgot to which company)
but wheter cypress nor the new company has the required information or want
to share them.
So please: Maybe someone has this old databook from cypress and could look
"at the end of this section"?
I got the algorithm for the TMS in a datasheet, but according the german
company "Conitec" that makes programmers (have a GALEP-III from them) that
seems to be not the same on the CY7C291. The guy there couldn't program my
samples I've sent to him.
Any help?
Regards,
Holm
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