ID UV erasable PROMS used on an IBM PC board?

Chris Elmquist chrise at
Tue Mar 22 14:25:05 CDT 2022

On Tuesday (03/22/2022 at 12:20PM -0700), Glen Slick wrote:
> On Tue, Mar 22, 2022 at 11:56 AM Chris Elmquist <chrise at> wrote:
> >
> > Trying not to hijack the thread too much but I have an Intel D27C256-200
> > here in my TL866II+ programmer and it returns ID  89h / 8Dh.
> >
> Page 5-78 (Page 1201 of the PDF)
> Table 1. Mode Selection
> Intelligent Identifier - Manufacturer 89H
> Intelligent Identifier - Device 8DH
> That is for the A27C256 "Automotive" rated version.
> My BP Microsystems BP-1610 device programmer software doesn't have an
> entry for that one either.

Interesting.  Thanks Glen.  The part is clearly labeled as
"D27C256-200V10" so they must not have gotten around to changing the D
to an A :-)

But, that explains it.  Thanks for the digging.

Chris Elmquist

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