IBM 1 Series - Page 63

2-52
GA34-0033
Line name Direction
Data strobe en
Halt or MCHK ——
Initiate IPL ——
IPL —
Poll ee
Poll identifier bit 0 ——
Poll identifier bit 1 ——
Poll identifier bit 2 en
Poll identifier bit 3 ——j>-
Poll identifier bit 4 ne
Poll prime ————
Poll propagate ——n
Poll return —————
Power on reset ——
Request in bus bit0O <°--—
Request in bus Dit 1 -qemmmme
Request in busbit2 <«-——
Request in bus bit 3 ~xqe-mennmme
Request in bus bit4 <———
Request in busbitS <>
Request in bus bit6 <—_——
Request in bus bit7 <——
Request in bus bit8 <>
Request in bus bit9 —~+>——=
Request in bus bit 10 _——
Request in bus bit 11 —<_——
Request in bus bit12 <—_————
Request in bus bit 13 —_——=—
Request in bus bitl4 <—_———
Request in bus bit!1S —<—--——
Service gate ———
Service gate return —
Status bus bit 0 ———<p
Status bus bit 1 ———
Status bus bit 2 ——
Status bus bit 3 ——P
ae
System reset
I/O pin
assignment
M10
M07
P07
S04
M12
Pil
S02
S03
P12
P1i3
M13
Mii
M04
SO5
S07
S08
S09
S10
$12
$13
U02
U04
U05
U06
U07
U09
U10
Vil
U12
U13
POS
P06
J13
G13
M03
P02
M05
Proc-
essor
driver
receiver
type
C-D .
C-D>
C-D
C-E
C-D
C-D
Unused
Unused
C-D
C-D
C-D
(Note 4)
C-E
Note 5
C-E
C-E
C-E
C-E
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
C-D _
C-E
C-D
C-D
C-D
C-D
C-D
Active
level
Minus
— Minus
Minus
Minus
Plus
_ Minus
Minus
Minus
Minus
Minus
Plus
Plus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus
Minus .
Minus
Figure 2-21 (Part 2 of 2). Channel drivers/receivers types and levels
4952/
4953 4955
| quies- quies-
cent cent
level level
Plus Plus
Plus Plus
Plus Plus
Plus Plus
Minus Minus
Minus Minus
Plus Plus
(Note 3) (Note 3)
Plus Plus
(Note 3) (Note 3)
Plus Plus
Plus Plus
Minus Minus
Minus Minus
- Plus Plus
Plus Plus
Plus Plus
Plus Plus
Plus Plus
Plus Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Note 6 Plus
Plus Plus
Plus Plus
Plus Plus
Plus Plus
Plus Plus
(Note 7)
Plus Plus
Plus Plus