chip identification

[Gordon JC Pearce MM3YEQ]

On Sun, 2009-01-04 at 18:58 -0500, Curtis H. Wilbar Jr. wrote:
> Trying to ID some chips I pulled from various pieces of equipment.
> 
> I have a cpu? I pulled out of a modem ... Signetics
> SC80C31BCPN40.  This would appear to be an Intel 8031 based
> cpu.  But does it have an internal ROM/etc that would preclude
> its reuse ?

I'm pretty sure the 80C31 is ROMless.  Was there a ROM on the board too?

> I have 3 chips now in the trash pile... I believe they are OTP EPROMs
> (and since used, are no good).  MX 27C1000PC-70, ATMEL
> AT27LV256A, and AtMel AT27C010-70JC.

They are AFAIK OTP parts, yes.

> Lastly I have what I think is EEPROM.  SST PH29EE010-150-4CF.
> I believe this to be a 1Mbit EEPROM. 

Sounds about right

> Searching google for chip part numbers is paramount to useless
> due to all the chip vendors advertising....  there has to be a better
> way....

Awful, isn't it?

> So, beyond looking for better ways to search for chip data/datasheets,
> can anyone confirm the identification of the above chips ?
> 
> Is an 8031 cpu 'fun' to play with ? :-)

Alesis certainly seemed to think so.

Gordon