GE 235 System Manual page 92

DIGITAL INPUT/OUTPUT DISTRIBUTOR (DI/OD)
Moves data between four e x t e r n a l buffers and the GE-235.
T r a n s f e r s data a t the r a t e of 50,000 twenty-bit words p e r second.
Housed in a cabin
40-1,'8 inches wide, 32-1/8 inches deep, 76 inches high; h a s i t s own power
supply.
F o r p r o g r a m m i n g the DI/OB and DI/OC, the S E L P instruction i s always followed by twc command
words. The f i r s t command word gives, in octal, the m e m o r y a d d r e s s of information coming f r o m a
p e r i p h e r a l . The second command word gives, in octal, the m e m o r y a d d r e s s of the information
goin? a peripheral.
F o r Multiple Cycle:
S E L P
OCT 1 OXXXXX
OCT 04XXXXX
F o r Multiple Cycle with
Automatic P r i o r i t y Interrupt:
SEL P
OCT 1 1 XXXXX
OCT 05XXXXX
F o r Single Cycle:
S E L P
OCT l2XXXXX
OCT 06XXXXX
F o r S i n ~ l e Cycle with
Automatic F'riority Interrupt:
S E L P
OCT 1 3XXXXX
OCT 07XXXXX
T h e following b r a n c h conditions m a y b e t e s t e d f o r through t h e u s e of t h e O C T command.
O c t a l
2514P20 DI/OB (DI/OC) Not Ready
2 516P20 DI/OB (DI/OC) Ready
2514P21
No p a r i t y e r r o r on DI/OB (DI/OC)
2516P21 P a r i t y e r r o r on DI/OB (DI/OC)
2514P22 CWI Not Busy
2516P22 CW1 Busy
2514P23 CW2 Not Busy
2516P23 CW2 Busy