29 Oct
2012
29 Oct
'12
3:53 p.m.
...on IBM mobos can be used to read what types of eproms? If you wanted to read off the
contents to a disk file...
7 p.m.
> ...on IBM mobos can be used to read what types of
eproms? If you
> wanted to read off the contents to a disk file...
On Mon, 29 Oct 2012, Dave
McGuire wrote:
I think they're decoded for 2764s, aren't
they?
I don't think so, but >30 years on unrefreshed wetware dynamic RAM?
My generic 5160s took 2764, but I think that the real IBM [5150 and
5160] ROMs were a different pinout than that.
4:27 p.m.
On Mon, 29 Oct 2012, Chris Tofu wrote:
...on IBM mobos can be used to read what types of
eproms? If you wanted
to read off the contents to a disk file...
Depends.
5150, 5160, GENERIC 5160 clones, 5170?, thinkpad?, PS/2?
ROMs, or maybe PROMs
Are there ANY EPROMs with the right pinout?
My generic 5160 clones used 2764? EPROMs
10:31 p.m.
On 10/29/2012 04:27 PM, Fred Cisin wrote:
On Mon, 29 Oct 2012, Chris Tofu wrote:
Clones were all over the place. Many have extra sockets that take 2764
JEDEC pinouts, some have jumpers to accept 27128 or 27256 and number of
extra sockets varies. Some allow you to populate the E0000-EFFFF memory
area.
--Chuck
...on IBM mobos can be used to read what types of
eproms? If you wanted
to read off the contents to a disk file...
Depends.
5150, 5160, GENERIC 5160 clones, 5170?, thinkpad?, PS/2?
ROMs, or maybe PROMs
Are there ANY EPROMs with the right pinout?
My generic 5160 clones used 2764? EPROMs 
5:42 p.m.
On 10/29/2012 3:53 PM, Chris Tofu wrote:
...on IBM mobos can be used to read what types of
eproms? If you wanted to read off the contents to a disk file...
Chris, the ones I think were in the clones were 2764's. I only went
from IBM PC to clone and the proms they had though
compatible with the
eproms didn't work in clone boards, so you needed a prom /
eprom part
reader to get the data and then write the eprom.
Looks like 64k X 8, which are 2764's
http://www.retroarchive.org/dos/docs/ibm5160techref.pdf
The PC / AT had different proms and they were 8 bit parts but on a 16
bit bus, so the bytes were interleaved.
I didn't find a tech reference for it in a short search.
Jim
8:08 p.m.
On 10/29/2012 8:42 PM, jim s wrote:
On 10/29/2012 3:53 PM, Chris Tofu wrote:
My IBM PC clone had extra EPROM sockets that corresponded the "real" IBM
PC's ROMs / EPROM holding Basic. This is why the IBM Basic would not run
on clones.
You certainly could put a correct pin out EPROM in one of the sockets
and read it / write its contents to a disk.
Nanoman.
...on IBM mobos can be used to read what types of
eproms? If you
wanted to read off the contents to a disk file...
Chris, the ones I think were in the clones were 2764's. I only went
from IBM PC to clone and the proms they had though compatible with the
eproms didn't work in clone boards, so you needed a prom / eprom part
reader to get the data and then write the eprom.
Looks like 64k X 8, which are 2764's
http://www.retroarchive.org/dos/docs/ibm5160techref.pdf
The PC / AT had different proms and they were 8 bit parts but on a 16
bit bus, so the bytes were interleaved.
I didn't find a tech reference for it in a short search.
Jim
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