Xebec controller and SCSI drive

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Xebec controller and SCSI drive

Postby John Van Winkle » Tue, 08 Feb 2005 05:33:02 GMT

Has anyone ever tried using a SCSI drive on one of these controllers?  Are
the disks necessary to set up the drive?



-- 
John Van Winkle
Home of 2 Apple IIe's
and growing.....
 XXXX@XXXXX.COM 



Re: Xebec controller and SCSI drive

Postby Mike Spurgeon » Tue, 08 Feb 2005 07:43:09 GMT



Put the header of this post in google.  Maybe put apple in with it.

Re: Xebec controller and SCSI drive

Postby Steven N. Hirsch » Tue, 08 Feb 2005 08:19:58 GMT



Electrically, that controller should talk fine with SCSI-1 drives.  Keep 
in mind that the SCSI bus protocol is managed by a software 
state-machine in the driver, so compatibility may be iffy.  These boards 
predated the availability of single-chip SCSI controllers like the 
NCR5380 family.  Come to think of it, they predated a stable SCSI-1 
specification!

Steve

Re: Xebec controller and SCSI drive

Postby Glenn Jones » Tue, 08 Feb 2005 09:13:29 GMT



Hi John, it has been many years since I used my Xebec Apple SASI card.

If memory surves me correctly I first used it with a SASI to MFM controller
board.  I had it hooked up to a 10MB IBM (ST506) drive. A company called
Shreve systems sold the converter. Next i put a SCSI to MFM board on the
same drive (also from shreve). I still have both convereter boards.

Later on I bought a ROM upgrade for the card from a company called STS
systems? That allowed the card to work with a ST225 60MB SCSI drive I
bought. I recall it supported ProDOS and CP/M perhaps Dos 3.3 as well. I
stll have the drive but it doesn't always spin up.

I also recall I think I needed to supply the drive geometry and they setup
the ROM for me.

At onetime I think I also took a stab a disassembling the ROM to see how it
all worked ..

ah .. the good old days

Glenn



Re: Xebec controller and SCSI drive

Postby Christopher Ryan » Tue, 08 Feb 2005 09:30:37 GMT

Any chance you might be able to make that ROM available on the net as a 
file?

Thanks,
Chris Ryan


Glenn Jones explained :



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This is an automatic signature of MesNews.
Site :  http://www.**--****.com/ 


Re: Xebec controller and SCSI drive

Postby Glenn Jones » Tue, 08 Feb 2005 09:50:39 GMT



I will dig out the card and grab the rom image ... I think I have a diskette
that goes with it as well.

Glenn



Re: Xebec controller and SCSI drive

Postby brad » Tue, 08 Feb 2005 10:11:03 GMT



diskette

yeah glen ...i could use a copy of that myself....keep me in the loop too

brad
former sysop lost-gonzo.com




Re: Xebec controller and SCSI drive

Postby Christopher Ryan » Tue, 08 Feb 2005 12:00:56 GMT

Glenn Jones has brought this to us :



Wow, thanks a lot.  It will be most appreciated!

-Chris Ryan

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This is an automatic signature of MesNews.
Site :  http://www.**--****.com/ 


Re: Xebec controller and SCSI drive

Postby Glenn Jones » Tue, 15 Feb 2005 03:53:15 GMT




Form a short period of time.

You can get both the ATS and SLS diskettes/ROM's here

 http://www.**--****.com/ 

Please read the web page before downloading

Glenn

Re: Xebec controller and SCSI drive

Postby Glenn Jones » Tue, 15 Feb 2005 04:06:59 GMT





Here is a corrected version to the previous note


If memory surved me correctly ... :o) I first used it with a SASI to MFM 
controller board.  I had it hooked up to a 10MB IBM (ST506) drive. A 
company called Shreve systems sold the converter.
The original xebec ROM was DOS 3.3 only.

I bought a ROM upgrade for the card from a company called Advanced 
Technical Services (ATS). That allowed the card to work with the same 
(SASI/MFM) drive (i think) but as a ProDOS device.

I also bought a SCSI/MFM converter to put on the same drive (also from 
shreve). I am pretty sure it worked with the ATS ROM.

Later I bought a seagate ST277N 60MB SCSI drive.  I recall it supported 
ProDOS and CP/M perhaps Dos 3.3 as well. I stll have the drive but it 
doesn't always spin up.

In order to get the seagate to work on the Xebec controller I definately 
needed the SLS rom.

I also recall I think I needed to supply the drive geometry and they 
setup the ROM for me.

It was 15+ years ago and that's all I can recall at the moment .. I was 
really into SCSI back then ... I even bought and still have the original 
SCSI spec document.


Glenn

Re: Xebec controller and SCSI drive

Postby Christopher Ryan » Tue, 15 Feb 2005 07:10:56 GMT

Glenn Jones used his keyboard to write :




Thanks again for doing this.

-Chris Ryan

-- 
This is an automatic signature of MesNews.
Site :  http://www.**--****.com/ 


Re: Xebec controller and SCSI drive

Postby Steven N. Hirsch » Tue, 15 Feb 2005 07:30:44 GMT



The SLS ROM code and utilities were written by Rodney Pederson, who also 
  designed the hardware for the CardZ180 Z-System card.  I had a hand in 
the system software for the latter.  And, yes, it was many moons ago..

I may have the sources  for the SLS ROM and formatter, but I have no 
idea where they're buried.

Steve

Re: Xebec controller and SCSI drive

Postby Glenn Jones » Tue, 15 Feb 2005 11:49:50 GMT




Your welcome  .. hopefully you (and others) may find it useful.

Glenn

Similar Threads:

1.Xebec controller and SCSI HD

Can you connect a regular SCSI HD such as an 80MB Apple SCSI drive to the
Xebec controller or will it ruin it and the Apple?

-- 
John Van Winkle
 XXXX@XXXXX.COM 
Home of the 2 Enhanced
Apple IIe's


2.Some questions about some cards (xebec sidecar controller, gs-ramp

  To: nyder
  Re: Re: Some questions about some cards (xebec sidecar controller, gs-ramp
  By: nyder to comp.sys.apple2 on Mon May 07 2007 01:26 pm

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superdrive.

--- Synchronet 3.14a-Win32 NewsLink 1.85
A2Central.com - Your total source for Apple II computing.

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