#: 5267 S9/Utilities
16-Jul-90 20:32:55
Sb: #5167-BURKE&BURKE + PBJ CC-BUS
Fm: DENNIS SKALA 73177,2365
To: RODGER ALEXANDER 75366,556
I wouldn't recommend using the B&B interface with the PBJ CCBus. It was the
death of mine, and the reason I finally broke down and bought an MPI.
First problem is that you need to add the 12 volt DC circuit to the CCBus (or
power the HD interface card with a separate 12 VDC). Then because the CCBus
doesn't switch the SCS and CTS lines separately, you must use a floppy
controller which is fully decoded to $FF4x, so that it doesn't conflict with
the B&B interface, which is at $FF5x. This means no Tandy floppy controller,
as well as many others. Or --- you could fully decode the offending floppy
controller. I did that, and it's fairly easy.
I don't recall having to patch any software for the sake of the hard disk
interface itself (of course to use the CCBus with OS9, a few system patches
were required for other stuff).
When I put the whole thing together, it worked for about 15 minutes and blew
out the average size wall transformer. I found the absolutely biggest one of
the proper voltage, rigged a plug to it, and gave it a try. It held out, but
ran super hot too. I used this setup for a while until I noticed that the
power supply on the CCBus board was running so hot that it melted the plastic
cover. The standard PC hard disk interfaces are apparently quite power hungry
At that point I gave up and got the MPI. A *LOT* more reliable (if physically
more inconvenient).
Give a yell if you need more specific information.
***** Dennis *****
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