IBM 1 Series - Page 123

IA&R
2
IA&RI (4)
t/ ? t IA&R3
RCV OP] RCV OP2 RCV OP3 /
1 L—_»
|____ TRO > TR —e IA&R1
Y
©
h
=
IA&R2
| RCV OP1 RCV OP2 RCV OP3 /
2 > La
{ t } JAGRI
RCV OP1 RCV OP2 RCV OP3 /
3 re L__»
@ © “y @
A ' 1A2
RCV OP1 RCV OP2 RCV OP3 /
4 >
(2) 1A3 (2) IA&R4 (4) IA&RS
i t f t
RCV OP4 RCV OPS RCV OP6 /
5
@) JAl @) IA&R2
pot PT Pm
RCV OP1 RCV OP2 RCV OP3 /
6 Le
@ IA&R1 @
RCV OP1 RCV OP2
/
7 ) | 4
IR (milliseconds) TR (milliseconds)
Baud rate 1RO (milliseconds)* for one stop bit* for two stop bits*
9600 0.936 1.01 1.12
4800 1.87 2.05 2.26
2400 3.74 4.14 4.55
1200 7.49 8.30 9.14
600 14.98 16.6 18.3
300 29.96 33.3 36.6 Key:
200
44.94
49.9
54.9
A
=
entry
point
150 59.9 66.6 73.3 OO = interru ways
pt with circled
110 81.9 70.8 99.9 condition code
100 89.9 99.9 109.9 IA = interrupt accept
79 119.1 133.3 146.6 IA&R = interrupt accept and
50 179.8 199.9 219.9 execute read command
*TRQ and Tr are + 0.1% RCV OP = receive operation envelope
Figure 4-6. State and timing diagram for possible receive operations
4-18 GA34-0033