> Gee... as long as YOU PUSH BC INTO THE STACK BEFORE CALLING #FD9F!!!
>
> Hard to believe perhaps, but #FD9F trashes B in my NMS 8250 + ESE-RAM.
Jeez, you don't have to shout....
Indeed... if you use B or BC you should push it, but what if you don't??
(grin!)
As far as I know $FD9F (H.TIMI), 'corrupts' not only BC, but as far as I
know all registers, except IX, IY, and the shadow registers. If you
really need them afterwards...... push everything on the stack.
About your next message (about the Turbo-R). I cannot find the schematic
right now (I have it..... somewhere), but it has indeed some hardware to
turn off the motor. Eventually building such a circuit is quite easy.
If no data is read/written within a certain time, just change the state
of the line which controls the spindle motor.
GreeTz,
Roberto
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