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From: det@hawkmoon.MN.ORG (Derek E. Terveer)
Newsgroups: comp.periphs.scsi
Subject: Re: Adaptec 4000
Message-ID: <1991May31.193343.5850@hawkmoon.MN.ORG>
Date: 31 May 91 19:33:43 GMT
References: <3424@sirius.ucs.adelaide.edu.au>
Organization: Home System (One of the Eternal Champions); Eagan, MN, 55123-2507, USA
Lines: 59

mbaker@ucs.adelaide.edu.au (Matthew Baker) writes:

>	I am looking for some information on an Adaptec 4000 SCSI to MFM
>controller board.  The PROM is revision date of 1983
>	1/ There doesn't seem to be a jumper for SCSI id number.  
>	   What SCSI id would the unit appear as?

The SCSI id jumper is defined by the 8x2 linear block, defined below.

>	2/ There is an 8 way x 2 jumper on the board that appears
>	    as follows
>		O M K I G E C A
>                . . . . . . . .
>                . . . . . . . .  J5
>                P N L J H F D B

Adaptec ACB-4000 Jumper Definitions:

These jumpers are arranged in two blocks; one is an 8x2 linear block and the
other is a 3x2 T-block.

			A C E G K M O
			B D F H L N P

      T
   S  R  PU

Jumper  Definition                              Installed       Removed
---     ---------------------------------       -----           -----
A-B     LSB of controller's SCSI Address        bit=1           bit=0
C-D     Another bit of the SCSI ID              bit=1           bit=0
E-F     MSB of controller's SCSI ID             bit=1           bit=0
G-H     DMA Transfer Rate                       SYSCLOCK/4      DATACLOCK/2
K-L     Not Used
M-N     Support of Syquest 312, DMA 630 and     Enabled         Disabled
        drives that drop SEEK COMPLETE sig-
        nal during head switching
O-P     Self Diagnostics                        Enabled         Disabled

R-PU	Write Precompensation turned off	Enabled		Disabled
	for both drives
R-S	Write Precomp starts at same cy-	Enabled		Disabled
	linder as reduced write current for
	both drives
R-T	Write Precomp is applied to all	Enabled		Disabled
	tracks for both drives



And now for *my* questions.  Has anyone gotten the ACB-4000 board to work with
a miniscribe 6085 MFM drive?  Also, does anyone have a quick and dirty little
first-time format utility written in either unix or dos that will work with
either the adaptec aha-1542a or seagate st-01a scsi controller cards?

derek
-- 
Derek "Tigger" Terveer	det@hawkmoon.MN.ORG -- U of MN Women's Lax
I am the way and the truth and the light, I know all the answers; don't need
your advice.  -- "I am the way and the truth and the light" -- The Legendary Pink Dots