Future Domain SCSI controller for AT bus
Steve Dyer
dyer at arktouros.MIT.EDU
Tue Oct 18 12:43:44 AEST 1988
In article <1988Oct17.113009.8481 at ateng.ateng.com> chip at ateng.ateng.com (Chip Salzenberg) writes:
>Perhaps I was mistaken about 2.3 including Adaptec support. My info was
>second hand.
XENIX 386 2.3 has several different versions, not all of which are out yet.
There will be a version released which supports the Adaptec card for
boot and root devices.
>The slowness may be due to the [Future Domain] controller or the driver
>or both. In truth,
>I don't care; it's just too slow. I'm ditching Future Domain as soon as
>possible.
This is good and useful information. It's also in direct contradiction
to Future Domain's literature, which makes the point that PIO can often
be faster than DMA on a 386AT architecture due to its ability to handle
arbitrary block transfers into virtual memory versus breaking up a
request into 4kb physical DMA transfers. I'd be interested to know
what "too slow" is here. How does it compare to your experience
with ST506 controllers under XENIX?
---
Steve Dyer
dyer at arktouros.MIT.EDU
dyer at spdcc.COM aka {harvard,husc6,ima,bbn,m2c,mipseast}!spdcc!dyer
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