31 May
2001
31 May
'01
9:07 a.m.
On Thu, 31 May 2001 12:07:38 -0400, John Lewczyk wrote:
#I'm looking for help making a 256*8 Tri-state PROM for the CPU card of
a
#Lisa.
#Its a MMI 6409-1N part. I don't have a data sheet and I don't have the
means
#to burn one.
#
#If I supply the part and the data, can anyone here burn a few of them
for
#me?
#
#Alleged parts equivilent to the MMI 6409-1N are:
#Signetics 82S135
#National 74S471
#TI 28L22
#
I also have a Data I/O 29B with Unipak 2A. I used it just last week to
burn a 3-rail 2708 and a couple of 2716s.
I had it read the MMI 6309 from my Lisa (using the Signetics part
number). It showed 16 lines of code, the rest blank.
If this is what you think one should look like, then I can probably
program it. This chip, btw came from the cpu board of my Lisa 2/5.
Louis