8-bit ISA SCSI (was Re: Possible to speed up I/O subsystem of 5150?)

From: Jim Leonard <trixter_at_oldskool.org>
Date: Fri Dec 17 20:42:19 2004

I've ordered one, thanks! I'll benchmark it to see how it performs against a
WD1002 w/ST-225.

Glen Goodwin wrote:
> As usual, I'm coming into this conversation late, but for those
> who are interested, you can still buy Rancho RT-1000B 8-bit
> ISA SCSI controllers for $15, brand new with a 90-day warranty:
> http://www.hitechcafe.com/eshop/product.asp?dept_id=4&sku=RT1000B-2
> I used these extensively years ago, and built hundreds of Win 3.1 and
> Win 95 machines with them. They are bootable, and used to include the
> driver
> diskette (I still have some of the diskettes -- as well as a few of the
> controllers). Remarkably, I never, ever saw one fail, and they worked
> with every (small) SCSI hard drive and CD-ROM I ever tried with them.
> Until a couple of months ago, I was still using one with a 50MB drive in
> the machine we used for a cash register in our shop.
> And, now that I recall, I've done a number of data transfers from
> XT clones to newer machines for customers by sticking an RT-1000B,
> with a small hard drive attached, into the XT clone, xcopy-ing the data
> from an ST-225, then moving the controller and the SCSI drive to the
> newer machine and reversing the process.
> Later --
> Glen
> 0/0
> ----- Original Message -----
> From: Fred Cisin <cisin_at_xenosoft.com>
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk_at_classiccmp.org>
> Sent: Thursday, December 09, 2004 4:40 PM
> Subject: Re: Possible to speed up I/O subsystem of 5150?
>>On Thu, 9 Dec 2004, 9000 VAX wrote:
>>>There are 8 bit SCSI controllers too. Once I sold two to one guy for
>>>$10. Both used NCR 53c90, both had ROM and were bootable.
>>I have a DTC 3250 (SCSI + floppy) with manual AND DRIVER DISK!, and a
>>Future Domain TMC-840. Both have ROMs (EPROMs?) They are available if
>>they will help.
>>(I found them a few days ago while looking for my ST-01s (another thread);
>>Some book or magazine had had source code for a stand-alone CD-ROM driver
>>using the ST-01, and I had gotten a few to play with many years ago.)
>>>>SMARTDRV was bundled with Windoze 3.10, and will work with
>>>>some of the <3.30 DOS versions.
>>>>But you need to use 3.31 or newer to have any partitions
>>>>larger than 32M.
>>>XT's do not have more than 640K memory, thus SMARTDRV is not very
> useful.
>>But wouldn't a few hundred K of cache be helpful?
>>While it's true that XTs can not have more than 640K of REAL memory
>>(actually 1M minus some overhead with some hardware and software hacks),
>>not even HIMEM, and certainly no XMS (Extended Memory Specification),
>>I have had up to 8meg of "Expanded" memory on XTs.
>>I have a tote full of TallTree JRAM, JLASER, etc. stuff.
>>I don't know what the max was on the later LIM (Lotus Intel MicroSoft)
>>EMS (Expanded Memory Specification).
>>Grumpy Ol' Fred cisin_at_xenosoft.com

Jim Leonard (trixter_at_oldskool.org)                    http://www.oldskool.org/
Want to help an ambitious games project?             http://www.mobygames.com/
Or check out some trippy MindCandy at             http://www.mindcandydvd.com/
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Received on Fri Dec 17 2004 - 20:42:19 GMT

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