On Sun, Apr 29, 2018 at 12:25 PM, Richard Sheppard via cctalk <[email protected]> wrote: >> There are hand-drawn schematics floating around but they don't appear >> to match the production hardware > > There is a service manual - "Amiga Computer Model 1000 Preliminary Component > Level Repair PN 314038-02" which does show those PALs on page 1-25 "Amiga > piggyback PCB assy #327139"
Examining that carefully, I do see the WCS parts entwined with the mainboard parts on the schematic at the back of the guide. The copy of the scan I have (from archive.org) does not show a Page 1-25. Chapter 1 ends with the keyboards tests on 1-16. I was more referring to a couple of standalone pages with what looks like a different rev of the WCS board. The DRAM chips and associated resistors and, well, most of the parts have different location/ID codes. Googling for "Amiga 327139", I found a reference with the following info: A1000 piggyback board 327139 A1000 piggyback board Rev A 327106-01 This is likely the difference. The standalone "piggyback board" schematics _are_ marked "Rev A" in the comment box. I've also seen pictures of later Amiga 1000s with all the components on the mainboard and no daughtercard, but I've never seen a machine in person like that. -ethan
