Oh, I don't have a PEx. I'm building this for a fellow in the UK who has one. It makes it a bit more challenging, that the PEx is over the ocean.First off, that'd be PEx . . .. . . and second, I didn't know you had one too! 8-o
My board has the ROM development sockets populated and gives me a startup chime with the two ProcCards I had.
The Crescendo G3 Accelerator I'd pinned my hopes upon for auto-booting into OS 9.x does the same, but still won't give me video or access a startup disk.
How much luck have you had with yours? :?:
Methinks it's time for a new PEx thread. [] ]'>
Our first thought was to build a ROM module with PSOP-44 sockets and then he could burn his own Flash chips and experiment until he got something working. However, when I built the ROM module with sockets and tested it in a 9500 (with 9500 programmed ROM chips) it did not work. I just cannot get the ROM (Flash) module to work with socketed chips.
So leaving out a lot of intermediate testing having to do with it being a really long time since I built any of htese, I'm going to solder flash chips directly to the module which are programmed with code from a downloaded (CopyROM) PEx ROM image.
The thing that worries me about this approach is that when I use CopyROM to extract the 9600 ROM, it does not match the images whcih I read directly from the desoldered 9600 ROM chips. CopyROM images from the IIci match images read directly from the IIci chips. So, hmmmm.
Yes, I'm taking the interleaving into account. My chip programmer will take a complete ROM image and interleave it across four (or more) chips.
Yes, the PEx ROM module seems to be identical to the x500/x600 family ROM module and the ANS ROM module for that matter.
Does your PEx have a ROM? I don't mean the two little PLCC32 chips, but the actual ROM DIMM that goes in a socket on the board?