trag,
I agree about the high byte termination being needed to get the 7722 working on a narrow scsi bus.
Most cheapo adapters do not have this, neither does the single adapter I have.
Every time I tried with a 50p male to 68p male adapter, the scsi adapter only gave timeouts, indicating, to me, a bus issue.
only time I didn't get a timeout was with a buslogic adapter, then a device was detected, yet the name presented was just garbled data.
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WRT the 16 bit tsop firmware issue. Just make yourself a file where every byte is 0xFF, then use romwalk to combine the two files together. the same way a Hi/Lo bios dump would be.
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Hello feipoa !
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the adapters I've used and functioned ...
LSI 53C1030 U320 scsi controller
adaptec 2940UW, 2940AU, AIC-7856T
buslogic flashpoint LT BA81c15
HP scanjet 5p (53c416) sym20403
adapter that didn't work for me, some HP netraid controller, got stuck on domain validation. might have worked in SE mode, can't recall.
To get the narrow bus working, on the 2940AU&UW, I used a 50p female to 68p female adapter, connected to a 68p cable terminated on both ends with the 7722 connected to one of the other connecters. That setup seems to work ok.
on the sym20403 card, I used a similar setup, though just added a few extension cables since the scsi card only has an external 50p scsi connector.
Tested with an old WD2000JB drive, which works fine
a JM2033J based msata to IDE convertor, which also works fine
and an almost directly connected CF card adapter with a sandisk ultra II 4GB cf card, which didn't work.
the 7722, in open air, reaches a temperature of about 52°C when just doing a linear read of a whole disk.
average operating temperature seems to be around 40°C
transfer speeds for
the ISA card were over 2MB/s, tested copying a 1G file to an SSD ,
the 2940AU around 13MB/s, tested using checkit in dos ,
the 2940UW around 18MB/s, tested using checkit in dos ,
the 53c1030 with checkit in dos around 31MB/s, linear read in linux, dd iflag=direct... , around 96MB/s .
The ISA, 2940AU&UW tests were done on an abit be6-II board with a p2-350 cpu,
the U320 test on a tyan S2895, can't recall the exact cpu spec.
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Anyway, if you have a good link to purchase some of those 50p male to 68p male with high byte termination adapters which aren't priced over the top, please let me know.
Cheers !
edit: all the 7722 boards I have are rev.3 and the firmware I used is the latest available for the 7726Q