IBM 1 Series Manual page 129

Jumper Selections
4-24
Person facing card
Figure 4-7 shows the card jumperselections for the teletypewriter adapter.
All card jumper pins are located in-line near the output edge of the
installed card so that they can be read while the cardis installed in an I/O
card slot.
Cabling
Teletypewriter adapter card
installed in I/O card position
V1
\ User 12-volt power jumper*
C connector J
"oN
C 2x8 oO 0
MSB 0 Oo (illustrates jumper for TTL minus = data mark)
schection ° ©
LSB (illustrates jumpers for 1200 bits per second)
MSB a
Bit-rate
[oo]
selection
Oo Oo
(illustrates jumper for device address hex 80)
LSB O O
MSB
MSHD o 9°
O O Internal jumpers (mustbe installed)
Device-address
selection MSB] 0 o
O O
LSHD
oe) (illustrates jumper for primary IPL source)
LSB Oo O
selection Secondary oe)
O oO
Oo oO
* 12-volt power jumper installed only for
nonisolated current loop interface.
Key:
MSB = most-significant bit
LSB = least-significant bit
MSHD = most-significant hexadecimal digit
LSHD = _least-significant hexadecimal digit
Figure 4-7. Jumperselections
GA34-0033