IBM ROM BIOS upgrade kit
Timothy Cain
Does anyone have or know where I could obtain an IBM PC ROM BIOS
Upgrade Kit, part number 1501005? My neighbor needs one desperately
for her PC, which won't use the hard disk without this. IBM doesn't
stock it anymore, and dealers in the area don't have it.
Thanks.
Tim.
--
Timothy D. Cain Department of Information and Computer Science, UC Irvine
ca...@ics.uci.edu (ARPA)
"Nondeterminism means never having to say you're sorry."
Michael Schuster
>
>Does anyone have or know where I could obtain an IBM PC ROM BIOS
>Upgrade Kit, part number 1501005? My neighbor needs one desperately
The kit isn't available (it originally came with a chip puller and
instructions, I think). However the ROM itself is still floating about.
One place advertises monthly in Computer Shopper; they sell them in
single quantities for $25. Ask for part #MK36C35N-4, Program # 1501476.
Hi Tech Electronics
7686 St. Clair C
Mentor, Ohio 44060
--
l\ /l' _ Mike Schuster {sun!hoptoad,cmcl2!phri}!dasys1!schuster
l \/ lll/(_ Big Electric Cat schu...@dasys1.UUCP
l lll\(_ New York, NY USA DELPHI,GEnie:MSCHUSTER CIS:70346,1745
Lynn Macey
I saw an add in the current PC Week that this part is available
from:
Self-Reliant PC Products
1750 Kalakaua Ave #3-133
Honolulu, HI 96826
Part # MK36C35N-4
Prog # 1501476 IBM 81-83
Standard disclaimer:
I don't know these people. I haven't done business with these
people. They ran an ad and I am posting it because there is interest.
Lynn Macey, Plexus Computers
lynn@plx
William Svirsky
>Upgrade Kit, part number 1501005? My neighbor needs one desperately
>for her PC, which won't use the hard disk without this. IBM doesn't
>stock it anymore, and dealers in the area don't have it.
From a PCWEEK magazine ad:
ROM UPGRADE CHIP FOR ORIGINAL IBM PC
This is the hard to get IBM upgrade ROM that allows your original PC to
utilize the full 640K of RAM and allow your PC to recognize and use a
bootable hard disk. *These are authentic IBM chips - not pulls*.
ONLY $49.95 EACH!
Part No. MK36C35N-4 Prog. No. 1501476 IBM 81-83
SELF-RELIANT PC PRODUCTS
1750 Kalakaua Ave. #3-133
Honolulu, HI 96826
Phone: 808-946-1808
I don't have any experience with this company.
I believe I've seen similar ad by another company in Computer Shopper's
magazine, but it's at home. If I remember, I'll post it also.
--
Bill Svirsky, Citicorp+TTI, 3100 Ocean Park Blvd., Santa Monica, CA 90405
Work phone: 213-450-9111 x2597
svi...@ttidca.tti.com | ...!{csun,psivax,rdlvax,retix}!ttidca!svirsky
Michael Schuster
>Upgrade Kit, part number 1501005? My neighbor needs one desperately
Related subject: does anyone know what kind of ROM was used in the
original IBM PC (not XT) of which this is a replacement? By this
I mean, not the IBM part number but the generic ROM type. Put another
way, what type of BLANK (EP)ROM could be burned and put into that socket?
2764? 2532?
William E. Davidsen Jr
| Related subject: does anyone know what kind of ROM was used in the
| original IBM PC (not XT) of which this is a replacement? By this
| I mean, not the IBM part number but the generic ROM type. Put another
| way, what type of BLANK (EP)ROM could be burned and put into that socket?
| 2764? 2532?
Fact: the PC tech ref says the part is 8k x 8 in size.
Recollection: I think you can make an exact duplicate using a 2764.
However, there are two address pins switched, so you can't easily burn a
modified version. I remember seeing an adaptor used to allow burning a
new ROM with a standard PROM burner.
--
bill davidsen (we...@ge-crd.arpa)
{uunet | philabs | seismo}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me
William E. Davidsen Jr
| Related subject: does anyone know what kind of ROM was used in the
| original IBM PC (not XT) of which this is a replacement? By this
| I mean, not the IBM part number but the generic ROM type. Put another
| way, what type of BLANK (EP)ROM could be burned and put into that socket?
| 2764? 2532?
First, my old tech ref says the ROM is 8k x 8, so I think that's 2764.
The part I'm not sure about is if there are two address pins flipped on
the ROM, such that it can be read in order only in a modified socket,
although it could be duplicated in a standard PROM burner.
I seem to remember seeing a socket and plug with a lot of wires
connecting them, which switched the two pins back. I am not sure about
this, so don't waste your electrons flaming me if that's not the way it
is.
Michael Schuster
>In article <59...@dasys1.UUCP> schu...@dasys1.UUCP (Michael Schuster) writes:
>
>| Related subject: does anyone know what kind of ROM was used in the
>| original IBM PC (not XT) of which this is a replacement? By this
>
>The part I'm not sure about is if there are two address pins flipped on
>the ROM, such that it can be read in order only in a modified socket,
>although it could be duplicated in a standard PROM burner.
I've been told the original EPROM had a Motorola pinout, and that a
68764 or 68766 would work. These are 24-pin devices (like IBM's). I
don't think a 2764 would work in any configuration (read or write),
as it's a 28 pin device.
Both devices are still listed by the big mail-order houses (Jameco
and the like). Anyone happen to have a pinout?
Dale Frye
The EPROM to use is Mototola MCM68766.
I bought some from Hamilton-Avnet. Cost about $5 - $10 each.
This is a 24 pin EPROM. Most 8K EPROMS are 28 pin.
1: Don't copy the XT BIOS. It won't work in the PC.
2: Only the BIOS needs to be copied. It is the ROM on the extreme right
looking in from the front of the machine. The other ROMS are for BASIC.
3: Some PROM programmers may not be able to read the original ROM.
The chip select pin of the rom must be strobed with each data access.
Many burners don't do this. I had to write a little program to read the
ROM in the machine and send the data over to the burner.
Dale Frye @ Washington University