Thank you, good information.
Found this from Midwest systems. They were a solid reseller back in the
1980's and this is probably the best first person vendor supported info
on jumper settings for RQDX3's.
READ BEFORE INSTALLING DISK DRIVE 2/89
RD54 MAXTOR
* WARNING: This disk drive has been hardware formatted for an
RQDX3. Do not attempt to format this drive on a MicroVAX using
the Customer Confidence Diagnostics. The format is not compatible
with this drive. If reformat is absolutely necessary, please
contact Midwest Systems Technical Support Department first.
1. The RQDX3 being used MUST be inspected to determine its
version, and the W23 jumper MUST be configured accordingly:
(FAILURE TO DO SO MAY DESTROY THE HARDWARE FORMAT.)
Version 3 Identification
IF: Location 1: ROM 244E5, or 286E5;
Location 2: ROM 243E5, or 285E5
THEN: at W23 jumper between post 1 & 2 only.
Version 4 Identification
IF: Location 1: ROM 340E5;
Location 2: ROM 339E5
THEN: at W23 jumper between posts 1 & 2, and 3 & 4.
2. Depending on the drive version, set the white or blue unit
select jumper (located in the rear of the drive on the printed
circuit board) between C and 3 or 2 and 3 for drive zero (0).
