IBM 1 Series Manual page 98

External inputs
MSB
MSHD
LSB
Device address
selection
MSB
LSHD
LSB
Key:
MSB =
LSB =
MSHD =
LSHD =
Figure 3-3.
Cabling
Ver™
User's
connector
2X&
Timer 0 clock
Timer 1 clock
Timer 0 external gate {
Timer 1 external gate
Timer card
Note. One jumper required for each
yp y horizontal row of pins
o—O O
eo—O O
o-—O oO
C—O O
Oo oO
Oo GO
oO C—O
oO @*O
Timer-0 digital input
(illustrates jumpers
for TTL input)
Timer-1 digital input
(illustrates jumpers
for filtered TTL input)
(illustrates jumpers for
a device address hex 80 or 81)
e—o
0 Oo
Oo Oo
Oo Oo
Oo Oo
Oo Oo
0.00
*
'\__ LSB not jumperable
most-significantbit
least-significant bit
most-significant hexadecimal digit
least-significant hexadecimal digit
Jumper selections on the timer card
Timer Feature 3-5