IBM 1 Series - Page 87

I/O pin TCC
Line name Direction assignment pin no.
Data strobe —— M10 Y30
Halt or MCHK —m M07 Y27
Initiate IPL ———— P07 Y0O7
IPL fee S04 224
Poll —ce M12 Y32
Poll identifier bit 0 ——— P11 Yiil
Poll identifier bit 1 ee S02 Z22
Poll identifier bit 2 ———— S03 Z23
Poll identifier bit 3 ———p P12 Y12
Poll identifier bit 4 — P13 Y13
Poll prime ——— M13 Y33
Poll propagate ——— M11 --
Poll return <—_—_—— M04 Y24
Power on reset (see Note) —— S05 Z25
Request in bus bit 0 ——= S07 Z27
Request in bus bit 1 -_ S08 Z28
Request in bus bit 2 <—_ SO9 Z29
Request in bus bit 3 <_— S10 Z30
Request in bus bit 4 <+_ $12 Z32
Request in bus bit 5 —_—_— $13 Z33
Request in bus bit 6 <~—— U02 Z02
Request in bus bit 7 <~_—- U04 Z04
Request in bus bit 8 <__— U05 Z05
Request in bus bit 9 <—_ U06 Z06
Request in bus bit 10 <+_ U07 Z07
Request in bus bit 11 <+_ U09 Z09
Request in bus bit 12 —_—_— U10 Z10
Request in bus bit 13 —_ Ul11 Z11
Request in bus bit 14 <_— U12 Z12
Request in bus bit 15 —_ U13 Z13
Service gate ——— POS YOS
Service gate return —— P06 Y06
Status bus bit 0 ———— J13 X13
Status bus bit 1 —pP G13 X33
Status bus bit 2 ———$>- M03 Y23
Status bus bit 3 —— P02 YO2
System reset ———p MO5 Y25
Note: ‘Power on reset’ at the top-card connector pin Z25 is the ‘power-on reset’ from
the next outboard I/O expansion unit. Neither this ‘power-on reset’ nor the ‘power-on
reset’ at the bottom of the card are repowered (both of these resets are used in the card
for control logic).
Figure 2-33 (Part 2 of 2). Channel repower feature pin assignments
2-76 GA34-0033