[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards

Hello Everyone -

I just assembled my IDE board and happily everything passed the assembly steps along the way. 

I have output the following and everything passes:

QO33,80 ; Configures ports A, B and C as output ports
QO32,2B ; Selects right hand pair of digits
QO30,01; display 01on right digit pair and work through each bit - all ok

QO32,2c; Selects middle pair of digits
QO30,01; Should display 01 on middle digit pair, work through each bit - all ok

QO32,2d; Selects left hand pair of digits
QO31,01; Should display 01 on left digit pair, work through each bit - all ok

All displays are correct.

Now the final step is the Drive Select and that is where I am having trouble:

Board always comes up with 'Drive B' selected

Now,  QO34,0; selects drive A

Reset, start again:

QO34,1; selects drive A

I can never select drive B and on start up, either 0 or 1 to port 34 selects drive A.

Any suggestions?  There should be no port conflicts in by system...


On Tuesday, March 18, 2014 6:27:41 PM UTC-4, Edward Snider wrote:
Hi everybody,

I'd like to do a board distribution project of Dual CF-Card/Hard Disk IDE S-100 Boards.

Is anyone interested in getting one or more of these?

Just post here and I'll get a list started.