06-10-2022, 05:36 PM
(06-10-2022, 04:05 PM)deanclaxton Wrote: Are the equations available for the PROM chips on the DRAM board? I know the JED files are there but wondering if the equations are published anywhere?
No, as a policy, we do not release the source code for any Microbee software or (in this case) proms.
(06-10-2022, 04:05 PM)deanclaxton Wrote: I'm curious what the different colour codes represent functionality wise (probably published in one of those documents) but also interested in the equations to duplicate the functionality in another device plugged into the socket. I'm sure it can be worked out from JED and schematic but curious if its published.
As far as the colours on the PALs go, it was just to identify which fuse file it was programmed with in the factory.
Red = 64k DRAM (only 32k banks 0 & 1 supported)
White = 128k DRAM (4 x 32k banks supported)
Silver = 256TC DRAM control with 8 x 32k banks supported, and
Gold = Video control PAL for the Premium & 256TC