Specifications

Index
A
ADP (adapter control block), 1–5
Alternate start I/O routine
address, 4–3
AST (asynchronous system trap)
special kernel-mode, 5–9
AUTOCONFIGURE command
in System Management utility (SYSMAN),
10–4
B
Buffer
allocating, 1–10, 5–8
data area, 5–8
deallocating, 5–9
format, 5–8
header area, 5–8
locking, 1–10, 4–5
size, 5–8
storing address of, 5–8
testing accessibility of, 5–8
Buffered data path
releasing, 8–2
Buffered function mask, 4–4, 4–5
Buffered I/O, 1–9, 1–10
FDT routines for, 5–7 to 5–9
functions, 4–4
postprocessing, 5–8 to 5–9
reasons for using, 1–9 to 1–10, 4–5
Busy bit
See UCB$V_BSY
C
Cancel I/O bit
See UCB$V_CANCEL
Cancel I/O routine
address, 4–3
Cancel-I/O routine, 1–3
CCB (channel control block), 1–5
Channel, 1–5
Cloned UCB routine
address, 4–4
CONNECT command
in System Management utility (SYSMAN),
10–5
Controller initialization routine, 1–3
address, 4–3
allocating controller data channel in, 6–3
Controlling executive image slicing, 10–14
Counted resource
defined, 3–1, A–7
Counted resource items
allocating, 3–1 to 3–53–6
deallocating, 3–6
CRAB (counted resource allocation block), 3–1
CRAM (controller register access mailbox)
allocating, 2–4 to 2–5
initializing, 2–6
using, 2–7
CRB (channel request block), 1–4
CRCTX (counted resource context block), 3–2
allocating, 3–2
deallocating, 3–6
initializing, 3–3
CRTL References at Link-Time, 9–4
CSR (control and status register)
address, 6–2
defined, 2–2
loading, 6–4
D
Data path
purging, 8–2
Data structure
initializing, 4–1
Data transfer
overlapping with seek operation, 6–2
DDB (device data block), 1–4
DDT (driver dispatch table), 1–2
creating, 4–3, 4–4
Delta/XDelta Debugger (DELTA/XDELTA), 11–1
Device activation bit mask, 6–3
Device characteristics, 5–4
Device controller, 1–4
multiunit, 6–2, 6–4
single unit, 8–2
Index–1