27 May
2004
27 May
'04
12:38 p.m.
At 10:11 PM 5/27/04 +0100, you wrote:
Joe R. wrote:
Cool! I have the same programmer and I thought it would program them but
I wasn't sure. My Pro-Log programmer will program too but you have to have
different plug-ins for the different brand parts.
Joe
The PROMs are 4 bits wide, which means that
Doesn't the M9312 use Bipolar PROMs?
Yes, they are 74S571N, Am27S13 or 82S131N devices (2048 bit).
Does anyone know the part numbers of the blank
ones or have a source for
them or a programmer that can program them?
I have a programmer that can read and write them, a Stag PPZ with
Zm2000 EPROM module. the PDP-11's 16-bit words are stored in a somewhat
strange manner.
In fact, some of the bits are stored inverted, too. The M9312
manual describes it all, though, and I've written some code to
un-mangle the data (which seemed to work).
--
John Honniball
coredump(a)gifford.co.uk