Another floppy mod thought
Posted: Thu Oct 18, 2018 11:30 am
Had this thought before.. But we could actually tweak the motor on signal for internal and external drives as currently motor on goes to both internal and external drives so they both power up the same time.
As we have the option to do any mod we want now, you could actually add a small logic chip in their separate signals so they turn on independently.
Basically input (A) would be the motor on signal, and input (B) would be the drive select signal. So both of these have to be low for the motor on signal to propagate on the output (Y).
So if 2 or gates were used on internal and external floppy drives, the motor on signal would only be active on the drive is currently being accessed.
Thought 2:
We also have the option to do a proper A/B select switch in a new schematic.. Its just working out exactly how to go about it.. Probably some jumper links on the motherboard to switch around..
As we have the option to do any mod we want now, you could actually add a small logic chip in their separate signals so they turn on independently.
Basically input (A) would be the motor on signal, and input (B) would be the drive select signal. So both of these have to be low for the motor on signal to propagate on the output (Y).
So if 2 or gates were used on internal and external floppy drives, the motor on signal would only be active on the drive is currently being accessed.
Thought 2:
We also have the option to do a proper A/B select switch in a new schematic.. Its just working out exactly how to go about it.. Probably some jumper links on the motherboard to switch around..