Re: Found a ROM SIMM....

2005-07-09 Thread Jeff Walther

From: John Niven [EMAIL PROTECTED]
Date: Thu, 7 Jul 2005 13:43:12 -0700

In my local computer junkyard I found this SIMM in an antistatic bag,
so I have no idea where it comes from.

It's a 64 pin simm with a notch in the middle. It has four, socketed,
EPROM's which have stickers on the top. These read:

342-073*
C APPLE 1983-89
W8929

where the * is 3, 4, 5, or 6 for each EPROM.


Yep, definitely a IIci ROM.  I checked the part numbers on the chips 
for one of my IIci's and they're the same.  This is the most reliable 
way of visually identifying Apple ROMs.  Each chip will have a 342- 
or 343- part number on it.  This is also the best way to visually 
identify Beige G3 ROMs.  OWC had a web page with a bunch of stuff 
about the different circuit cards, but all one needs to do is read 
the part number off of the chips to know which version is in hand.


There are a few ROMs out there built from EEPROM chips which may just 
have chip manufacturer numbers on them and no Apple part numbers. 
I've been told that these were development ROM modules which could be 
reprogrammed either in the host machine or on a machine on the bench.


Jeff Walther


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Found a ROM SIMM....

2005-07-07 Thread John Niven
In my local computer junkyard I found this SIMM in an antistatic bag, 
so I have no idea where it comes from.


It's a 64 pin simm with a notch in the middle. It has four, socketed, 
EPROM's which have stickers on the top. These read:


342-073*
C APPLE 1983-89
W8929

where the * is 3, 4, 5, or 6 for each EPROM.

Clearly W8929 means week 29 of 1989.

On the web I found a reference to these ROM numbers that indicate they 
belong to a Mac IIci.


The PCB is marked 1MEG ROM SIMM AP1257-01

Anybody any suggestions what could be done with this SIMM?

John


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Re: Found a ROM SIMM....

2005-07-07 Thread Snook, John R

Put them in an SE/30 and see what they do.
Or send them to me and I'll do it. :)
johnsn


In my local computer junkyard I found this SIMM in an antistatic bag, 
so I have no idea where it comes from.

It's a 64 pin simm with a notch in the middle. It has four, socketed, 
EPROM's which have stickers on the top. These read:

342-073*
C APPLE 1983-89
W8929

where the * is 3, 4, 5, or 6 for each EPROM.

Clearly W8929 means week 29 of 1989.

On the web I found a reference to these ROM numbers that indicate they 
belong to a Mac IIci.

The PCB is marked 1MEG ROM SIMM AP1257-01

Anybody any suggestions what could be done with this SIMM?

John

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Re: Found a ROM SIMM....

2005-07-07 Thread Stephen Conrad
My IIci would be willing to see what they do. :)

Steve

On 7/7/05, Snook, John R [EMAIL PROTECTED] wrote:
 
 Put them in an SE/30 and see what they do.
 Or send them to me and I'll do it. :)
 johnsn
 
 
 In my local computer junkyard I found this SIMM in an antistatic bag,
 so I have no idea where it comes from.
 
 It's a 64 pin simm with a notch in the middle. It has four, socketed,
 EPROM's which have stickers on the top. These read:
 
 342-073*
 C APPLE 1983-89
 W8929
 
 where the * is 3, 4, 5, or 6 for each EPROM.
 
 Clearly W8929 means week 29 of 1989.
 
 On the web I found a reference to these ROM numbers that indicate they
 belong to a Mac IIci.
 
 The PCB is marked 1MEG ROM SIMM AP1257-01
 
 Anybody any suggestions what could be done with this SIMM?
 
 John
 
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