HP 262SA Reference Manual page 182

Block Data Transfer
Table 9-2. Handshake Mode Interpretation from Configuration
G InhHndShk(G) strap H Inh DC2(H) strap
B
Block Mode (1) D Line (O)/Page (1) mode
Character mode (0)
(D strap)
N no handshaking
x
don't care
HI DC1 handshaking
H2 DC2 handshaking
TYPE OF TRANSMISSION
ENTER STATUS FUNCTION MODIFY
KEY Ec d REQ
KEY
MODES
GHBD N HI H2 N
HI H2 N HI H2
N HI H2 N HI H2
0 0 0 0 1 1 1 1 1
0 0 0 1 1 I 1 1 1
0 0 1 0
-
1 1 1 1
x
0 0 1 1 1 1
1 1 x
0 I 0 0 1 I I I I
0 1 0 I 1 I 1
1 1
0 1 1 0
1 1
1
1 x
0 1 1 1 I
1 1 1
x
1 0 0 0
-
1 1
1 1 1
1 0 0 1
1
1 I
1 1
1 0 1 0
-
1 1 I I
x
1 0 1 1 1 1 1
1 x
1 1 0 0 1 1 1 1
1
1 1 0 1 1 1 I
1 I
I 1 1 0
1 1 1 1 x
1 1 1 1
1 1 1 1 x
These values reduce to the formulae below (the symbol (( --" indicates a logical NOT
function):
ENTER NONE = (-G)( --B) +H
key:
DCI =0
DC2
=
(--H)( G + B )
9-4