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.
-tony