Yeah, no idea who had it before. Jim says the 384k PFM will be the flash boot, and it has the 192k upgraded 9938 RAM. It is missing the zero wait-state mod. Jon recommended I send it up to you (if you have time) or Richard Bell to have a look-see before I try using it, just in case, and I would rather be safe than sorry.
1. Not sure which 0-wait state mod Jim is referring to. It might refer to the Turbo video PAL (from WHT) which doesn't appear to be installed. The 384K memory option is 0-wait state.
2. Agreed, the 192K video mod is present.
3. The 384K is not PFM/flash; that is high speed RAM. It replaced the standard 32K chip with 384K , using two installation methods: 3 x 128K chips stacked or a single 512K chip. The latter was mostly installed by me after I took over Myarc repairs from Cecure.
4. The PFM is either two stacked 29c010 chips (2 x 128K flash) or a single 29c040 chip (512K flash) . Both have their nuances. The single-chip mod was installed by me and later, by Richard.
You will need a video cable for either composite output or RBG w/appropriate analog RGB monitor, and a keyboard. If you get that far, firing it up in a PEB is pretty simple. It will boot whatever OS is loaded into the flash, most likely MDOS 5.00 unless the previous owner updated the OS. If you are comfortable installing cards in a PEB, I see no reason not to try it yourself. Be sure the case is ON before inserting, otherwise the Geneve will rock and in turn, short pins within the PEB backplane connectors.
I often wrote my initials and the date on the back of each updated/repaired card, usually within the square solder points from the gate array socket. My guess is this was modified in 1997.