Culbrelai
Experienced Member
Does anyone know the names of some? Apparently Acculogic something or other.
Thanks in advance.
Thanks in advance.
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8-Bit ISA compatible 16 bit IDE cards?
- Thread starter Culbrelai
- Start date
rmay635703
Veteran Member
I’ve never had that work, though the floppy and serial ports usually do
Chuck(G)
25k Member
There was one Acculogic model made for the purpose, but then, a simple google search on "Acculogic" on this web site would have turned up the answer in seconds:
As a matter of fact, there was a discussion about this only one year ago here. And it was a re-hash of earlier discussions.
As a matter of fact, there was a discussion about this only one year ago here. And it was a re-hash of earlier discussions.
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rmay635703
Veteran Member
There was one Acculogic model made for the purpose, but then, a simple google search on "Acculogic" on this web site would have turned up the answer in seconds:
As a matter of fact, there was a discussion about this only one year ago here. And it was a re-hash of earlier discussions.
That is an 8 bit card, I think he meant one with a 16 bit ISA slot that would work in an 8 bit slot.
Chuck(G)
25k Member
What's the difference? Observe that the interface to an IDE drive is 16 bits (there was an option, still used for CF cards, for an 8 bit transfer, but not on any but perhaps the earliest IDE/ATA drives). No 16-bit card is going to multiplex the interface for 8 bit transfers. It simply doesn't make any sense. The Acculogic card (as well as the XTIDE card) has special circuitry to multiplex the 16 bit IDE data bus.
It has been opined that it might be possible to get a BIOS replacement to run a CF card on a 16-bit IDE controller in 8 bit mode, but note that most 16-bit IDE cards use an IRQ reserved for the second 8259 PIC.
I have used old 16-bit IDE/Floppy controllers in my 5160 running the XUB with CF and adapter connected to the IDE header with no problems, Note: Some IDE/Floppy controllers have a direct connection between pin 28 of the ide header and isa pin B28, And some cheapo CF adapters have pin 28 of the ide header grounded, Thus using both causes a short and the result is the 5160 will not start.
Chuck(G)
25k Member
But if you're talking about running an IDE drive, not a CF, the 16-bit card isn't going to work. If you search back in the forum archives, I believe that I was the first to broach the idea of an 8-bit IDE transfer using a 16-bit card.
I believe that Andrew did some experimenting with one of the XTIDE versions and discovered that doing 8 bit transfers from a CF card was slower than multiplexing the 16-bit output of a CF card.
I believe that Andrew did some experimenting with one of the XTIDE versions and discovered that doing 8 bit transfers from a CF card was slower than multiplexing the 16-bit output of a CF card.
Culbrelai
Experienced Member
I probably should have put this in the wantd section lol. Sucks that Acculogic card seems to be rare, guess ill have to do SCSI on my XT.
Also, I was talking about 16 bit ISA IDE cards which are known/proven to work in an 8 bit ISA slot, since they are FAR more common it seems.
This is exactly the kind of thing I want to know. What are the models of the IDE/floppy controllers you used?
Also, I was talking about 16 bit ISA IDE cards which are known/proven to work in an 8 bit ISA slot, since they are FAR more common it seems.
This is exactly the kind of thing I want to know. What are the models of the IDE/floppy controllers you used?
rmay635703
Veteran Member
I believe he is saying any that don’t ground pin 28 will work with an 8 bit compatible CF card,
You just can’t drive a 16 bit ide drive.
I guess it’s better than nothing
glitch
Veteran Member
Chuck(G)
25k Member
I did mention the XTIDE, but perhaps it blew by the OP without his notice.
It would be difficult to miss on this forum, in any case.
It would be difficult to miss on this forum, in any case.
Culbrelai
Experienced Member
I know about the XTIDE, unfortunately I do not have a soldering iron and I’m not paying $80 for a completed one.
However thanks a lot for the clairification on the pins, useful information there.
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I have a couple of old controllers with no identification on them, Made in Taiwan i think, A couple of Diamond Flower cards with own socketed bios onboard, I just burnt a new eprom with the XUB and swapped out the onboard bios, I don't remember the model numbers of any of the ones i have, I did post some details of the cards i have or had some time back, As others have done too, Should be a few post's on the forum re: 16-bit IDE/Floppy controllers that work in an 8-bit slot.