Radio Shack TRS-80 Operation Manual page 38
Ptc-64 printer controller
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Also See for TRS-80:
- Reference manual (274 pages) ,
- User manual (236 pages) ,
- Service manual (199 pages)
Table of Contents
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To
Printer
SIGNAL
FUNCTION
PIN#
STROBE*
1.8mS
pulse
to
clock
the data
from
PTC-64
to printer
DATAO
Bit
(lsb)
of output data byte
DATA
1
Bit
1
of
output data byte
DATA
2
Bit
2 of output
data byte
DATA
3
Bit 3
of output
data byte
DATA
4
Bit
4
of output
data
byte
DATA
5
Bit 5
of output
data byte
13
DATA
6
Bit
6
of output
data byte
15
DATA
7
Bit
7(msb)
of output data byte
17
ACK*
Input
to
PTC-64
from
printer
low
indicates data
byte received
19
BUSY
Input
to
PTC-64
from
printer,
high
indicates
busy
21
PAPER
EMPTY
Input
to
PTC-64
from
printer,
high
indicates
to
paper
—
if
printer
doesn't provide
this,
signal
is
forced
low
23
BUSY*
Input
to
PTC-64
from
printer
of
BUSY
logical
inverse
25
FAULT*
Input
to
PTC-64
from
printer,
low
indicates
fault
(paper
empty,
light detect,
deselect,
etc.)
.78
GROUND
Common
signal
ground
2,4,6,8,10
12,14,16,18,
20,22,24,27,
31,33
NC
Not
connected
29,30,32,34
*These
signals are active-low.
30
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