Specifications

22 RA7x/SA7x Pocket Reference Guide
Figure 12 RA7x Request Byte (Byte 4)
(SR) 0 = Spindle not ready (not up to speed)
1 = Spindle ready
X X X X X X X X
(RU) 0 = Run/Stop switch out
1 = Run/Stop switch in
Byte 4
Request Byte
(PS) 0 = Port switch out
1 = Port switch in
(PB) 0 = Port A receivers enabled
1 = Port B receivers enabled
(EL) 0 = No loggable information in extended status area
1 = Loggable information in extended status area
(DR) 0 = No diagnostic is being requested from the host
1 = There is a request for a diagnostic to be loaded into 
the drive microprocessor memory
(RR) 0 = Drive requires no recalibrated command
1 = Drive request recalibrated command
(OA) 0 = Drive on-line or available to current controller
1 = Drive unavailable (it is already on-line to another
controller)
COM-R057