Derek_Stewart wrote:Hi,
The PCB layout file is very interesting.
I am in the process of drawing the PCB schematic in KiCad, with a view to reproduce the Minerva MKII.
Are there any copyright restrictions?
I do not suppose the Minerva Mk I PCB layout is available?
Well, I originally drew it, but then TF took Minerva over so technically I guess it's Tony's shout these days. Is he still about? I'm fine with it being open source, myself.
I've attached my reverse engineering of the schematic (drawn in Inkscape!), along with the images posted above. Note that GAL pin 7 is tracked to both Vcc and Gnd, so will cause a short unless one track is cut. From the GAL logic it looks like Gnd is the correct one to cut for normal operation: that's the one on the component side.
Pretty sure the MK I is on the RiscPC, assuming I resurrect it I'll post the result.
Cheers
Jonathan