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Author Floppy drive controller
prezbedard

2004-02-20, 5:22 pm

ok I have a question I never really thought about until recently.

Technically speaking does the floppy drive controller have 2 channels since it is capable of supporting an A and B drive or is there another term?

Thanks.
gauji

2004-02-29, 9:40 pm

Kind of interesting question.

So I looked up some chips.

And I think the floppy controller is just controlling 1 drive (1 channel) but most of the chips have built in two controllers or more.

This one controls 4 drives
http://ivs.cs.uni-magdeburg.de/bs/l...oppy/DP8473.pdf

This one controls 2 drives
http://www.smsc.com/main/tools/datasheets/37c78.pdf

DaDnDe

2004-03-04, 10:20 pm

umm interesting question.

the older floppies had 5 wires that were twisted between the two connectors. the twisted wires were connected to the end connector or the A drive. the B drive was on the middle connector or the one closet to the MB.

so i think it would be fair to say that there were 2 channels in the cable.

also before, if you had one drive, it had to be connected to the end plug. but nowadays, it doesnt matter.
gauji

2004-03-04, 10:22 pm

quote:
Originally posted by DaDnDe
umm interesting question.

the older floppies had 5 wires that were twisted between the two connectors. the twisted wires were connected to the end connector or the A drive. the B drive was on the middle connector or the one closet to the MB.

so i think it would be fair to say that their were 2 channels in the cable.

also before, if you had one drive, it had to be connected to the end plug. but nowadays, it doesnt matter.



Agree that the cable supports 2 channels
prezbedard

2004-03-04, 11:31 pm

Here is my accepted answer

one channel supports 2 drives.

http://icertify.net/index.php?name=...iewtopic&t=1283
azimuth40

2004-03-05, 1:07 am

And the winner is prezbedard Uh guys the original PC 1981-82 had one 8 bit card with very big chips by todays standards which supported two drives. Today we would call that a channel.
Kasor

2004-03-06, 10:05 pm

very interesting... forgot to look up old floppy drive.. guess most of us don't have any at the stock
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