James Littlejohn wrote:
I am re-visiting this problem. Turns out that I had 2 traces damaged going between sockets. But, still not getting a Low signal on pin 41 on any socket when I access it with a "PR#X". Could it be that the 'Slotmaker' is bad, or is there some other way to check it?
PR#s accesses the slot ROM space at $Csxx, causing /IOSEL (pin 1) to go low, but unless code in the ROM there accesses the slot device space at $C0Sx (S=s+8), the /DEVSEL signal (pin 41) will not go low. -michael ******** Note new website URL ******** NadaNet and AppleCrate II for Apple II parallel computing! Home page: http://home.comcast.net/~mjmahon/ "The wastebasket is our most important design tool--and it's seriously underused."