UDC11 Jumpers

 

Up

Home
MSV11-K/L Jumpers
SLU Jumpers
Powerup Reset Circuit
UDC11 Jumpers

 

S0: bootstrap at 771000
S1: bootstrap at 773000 (default)
S2: CSR at 772144
S3: CSR at 772150 (default)

If U3 is labeled "WADU0" don't select S0, this version has special test registers instead of an alternate boot address.

22: 22 bit DMA addressing (default)
18: 18 bit DMA addressing

I5: interrupt on interrupt level 5
I6: interrupt on interrupt level 6
    (default is level 4)

8FR, 8FW: 500 kHz data rate (8" floppies)
5FR, 5FW: 250 kHz data rate (5" floppies)

PCW: enable Winchester write precompensation (default)
PCF: enable floppy write precompensation (default)

Qbus spare pins used:
AF1 (SSPARE2): write protect DU0: (when grounded)
AH1 (SSPARE3): write protect DU1:
AE1 (SSPARE1): write protect DU2:
BH1 (SSPARE8): write protect DU3:
 

 

Last modified: December 31, 2009