#A500 & 2.04 roms
5 messages in this thread
Don, I took the information you gave about the A500 and the 2.04 rom upgrade,
and took a look at the machine. The board is a revision 5, and there is no
jumper. Do I need to add the jumper? If not, do you have any other
suggestions. Thanks. >>Steve.
Steve,
yes…there MUST be a jumper between pin 1 and pin 31 on the ROM for it
to work in a rev 5 machine.
Don
Steve,
BTW…the way CBM made the jumper….they ran a small wire across the
top of the ROM and soldered the ends to the very top of the chip's legs.
Don
Hmmmm. There was NO jumper on the chip I received from Expert Services.
Since I thought I needed one (the docs were confusing), I dug out some magnet
wire and lashed the two pins together, across the top, using a wire-wrap style
of connection. It didn't work that way, so I took the jumper off, reinstalled,
and everything was GO.
Digging out magnet wire and counting pins is a tedious business. Wish they
had supplied the jumper. Then again, wish the docs had been more
understandable on the question. Ho hum. So it goes.
–Jim
Don, Thanks again. I'm not sure if it's good news or bad, that I thought of
the same solution as CBM :). >>Steve.