Ohio Scientific Universal RAM Board GW-OSI-RAM1

Chuck Guzis cclist at sydex.com
Wed May 3 19:08:42 CDT 2017

On 05/03/2017 04:49 PM, Systems Glitch via cctalk wrote:
> Finished building a prototype mezzanine board and testing with the
> IM6100 (PDP-8 on a chip) in the 560Z board today. Full writeup:
> The lamp register is on a mezzanine for a few reasons. First off,
> octal vs. hex grouping! It really throws me off to try and interpret
> one on the other. Second, it allows remote mounting on a ribbon
> cable, i.e. board can be mounted to a front panel. Third, I'll likely
> design a 7-segment version.

Is the IM6100/6120 still easy to find?  I'dve thought that the supply
was exhausted by now.

Octal for me is quite familiar for 12 bits;  I can't recall ever seeing
a 12-bit word that didn't use it.  On the other hand, 16 bits is a
natural for hex--and only gets confusing when it's in octal.


More information about the cctech mailing list