Acard SCSI to IDE adapters

[curtis]

Was wondering, is there a particular SCSI to IDE bridge that is preferred over others?

I have a 7720UW and it works fine, but was considering adding another and noticed the "UW" is a bit pricey while there is a AEC-7722 SCSI Bridge IDE to LVD that is significantly less.

Would the 7722 work okay for a SCSI to IDE to CF adapter?

Curtis

[orange]

Was wondering, is there a particular SCSI to IDE bridge that is preferred over others?

I have a 7720UW and it works fine, but was considering adding another and noticed the "UW" is a bit pricey while there is a AEC-7722 SCSI Bridge IDE to LVD that is significantly less.

Would the 7722 work okay for a SCSI to IDE to CF adapter?

Curtis

I think some of them are for CD devices and such. There is probably some difference in speed, dunno if it matters on Amiga. IIRC, they are cheaper but I'd avoid them.

[mechy]

Was wondering, is there a particular SCSI to IDE bridge that is preferred over others?

I have a 7720UW and it works fine, but was considering adding another and noticed the "UW" is a bit pricey while there is a AEC-7722 SCSI Bridge IDE to LVD that is significantly less.

Would the 7722 work okay for a SCSI to IDE to CF adapter?

Curtis

The 7722 is a LVD(low voltage differential) bridge,which is not used as single ended scsi like the 7720uw is. I don't think it will work,but i haven't tried it. Try one if you can and let us know.

Narrow 50pin scsi on A2000 will max out under 10MB/s, gvp being much slower and blizzard 2060 or DKB wildfire prob. giving the best performance. you would gain nothing over the 7720U or UW bridges.

[mechy]

I think some of them are for CD devices and such. There is probably some difference in speed, dunno if it matters on Amiga. IIRC, they are cheaper but I'd avoid them.

I could be wrong,but you may be thinking of the acard 7730 and 7730A scsi to sata bridges, one being intened for optical drives.

[curtis]

Being retired and on a fixed income and budget, not real enthused about buying something just to try it out!

If I'm fairly certain it would work I would consider it.

Not knowing...

The 7722 is a LVD(low voltage differential) bridge,which is not used as single ended scsi like the 7720uw is. I don't think it will work,but i haven't tried it. Try one if you can and let us know.

Narrow 50pin scsi on A2000 will max out under 10MB/s, gvp being much slower and blizzard 2060 or DKB wildfire prob. giving the best performance. you would gain nothing over the 7720U or UW bridges.

[mark_k]

Being retired and on a fixed income and budget, not real enthused about buying something just to try it out!

If I'm fairly certain it would work I would consider it.

According to the FAQ page on Acard's web site, AEC-7722 is for ATAPI drives (i.e. CD/DVD drives). So it probably wouldn't work with an IDE hard drive.

The 7722 can be jumpered for single-ended operation, so that would be no problem. But it's not compatible with IDE hard drives, at least if Acard's FAQ page is to be believed.

[curtis]

Oh well.  Would've been nice to save about half of what another 7720 will cost.

[desantii]

I have tried them and the 7722s don't work...

[JanciB]

Matze from a1k.org forum (German) loaded the firmware from 7726Q into 7722.
It worked.

http://www.a1k.org/forum/showpost.php?p=822501&postcount=23

[mark_k]

Yes I think it might (in theory) be possible to flash different firmware.

By way of comparison, I have an external wide SCSI CD writer. Inside is a Sony CRX230EE ATAPI drive and an Acard IDE-SCSI converter. On the converter PCB is the text AEC-7720UW. So depending on the firmware, the 7720UW can handle ATAPI devices. [The Acard FAQ page says the 7720UW is only for IDE hard drives.]