Other SMS300/8X300/8X305 uses?

Tony Duell ard.p850ug1 at gmail.com
Mon Nov 28 23:05:46 CST 2016

On Tue, Nov 29, 2016 at 1:43 AM, Al Kossow <aek at bitsavers.org> wrote:
> I bought a rev 1 with proms and a print server from dca on ebay today to dump
> http://www.ebay.com/itm/192014611480

That is the board I was thinking of.

> http://www.ebay.com/itm/262721065197
> On 11/28/16 5:33 PM, Eric Smith wrote:
>> On Sun, Nov 27, 2016 at 8:12 AM, Al Kossow <aek at bitsavers.org> wrote:
>>> IRMA card
>> I'd forgotten about that.  The later ones designed the 8X305 out.  It's
>> interesting in that the firmware gets loaded into RAM, rather than running
>> for PROM.

My guess is that EPROMs of that time were not fast enough for the 8X305 to run
flat out. Bipolar PROMs were too expensive in the capacity needed. So
they copied
the code into (fast enough) SRAM at startup.


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