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flat assembler > OS Construction > Floppy DMA code

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Gomer73



Joined: 29 Nov 2003
Posts: 151
Anybody know any sample code for floppy DMA transfers?
And possibly just regular code.

Looking for code that uses the ports only instead of int 13 and int 21.
Pretty well got the IDE working, so now to the floppy.
Post 01 Jun 2004, 15:53
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ASHLEY4



Joined: 28 Apr 2004
Posts: 376
Location: UK
Post 01 Jun 2004, 17:14
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Gomer73



Joined: 29 Nov 2003
Posts: 151
Excellent reference, thank-you. The code should give me a start.

Hopefully I can use my books on DMA to understand it a bit. I personally don't think the code will work, but who knows. He disabled DMA 2 right after he set the count value, so this is why I don't think it would work.

Thanks again though,

...Gomer73

PS: How is your OS comming? I found my little real mode switch program doesn't work too well when himem.sys isn't loaded and using hardware interrupts(like disk or the timer tick).
Post 01 Jun 2004, 20:07
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bogdanontanu



Joined: 07 Jan 2004
Posts: 403
Location: Sol. Earth. Europe. Romania. Bucuresti
SolOS Floppy driver code works ok.
Post 02 Jun 2004, 01:23
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Gomer73



Joined: 29 Nov 2003
Posts: 151
Thanks Bogdan, your OS is an inspiration to us all.
I like the organization of the directories on your source code.
Look forward to seeing when it gets to a stage that I would do some programming for it.
The forth thing should be interesting even though it is way off in the future.

I'll have a look at your floppy code. It is pretty long, and the floppy driver isn't a high priority for me now. The other docs will help me understand what you are doing.

...Gomer73
Post 02 Jun 2004, 05:08
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