Specifications
•
(C)
When this machine
is
used
by
the Centronics System (ROM unit MZ-8S P4R)
Data input system: 8 bit parallel
Control signal: ACK, BUSY, SELECT DATA STB, PRIME, FAULT
Data
input
code:
• ASCII code
Data buffer:
cr~.~;ii
1
I
,
2
3
4
5
6
7
8
9
10
II
12
13
(Setting
of
international characters
is
also possible.)
• 96O-byte image printing
is
possible.
I line
s)J,i:r
.·.···t~r·.".,:I:ij'
••...
'
···.i!·
.~
.. i
..
..........
'
.........
'
....
";i
i')~ji'i':
...............
''-111'
. .
....;
"
.•••.•.••.....••..
.
.'
.
'.
.
~Ili
...
'
....;;.].
)
....•
"""'i'"
··f·..
.i
..
'
..
·.
.
.'.........
. .
'..
.•..•••
.....
:.i
DATA STB
•
Synchronization signal to read DATA I - DATA 8.
(Negative logic)
• Pulse width shall be I Ilsec. min.
---
DATA I
•
These terminals are signal lines to receive information
DATA 2
contained
in
the I st to
8th
bits
of
DATA.
DATA 3
•
Pulse width
of
data shall be 3 Ilsec.
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
._--
ACK
•
To
be
output
when the printer finishes
all
its work
related to received data and codes. (Negative logic)
•
To
be
output
whenever BUSY signal
changes from
high to low.
•
Typical pulse width shall be 8 Ilsec.
BUSY
•
When this signal
is
high level, codes other than DC
code shall
not
be input. (Positive logic)
(However, no input can be made during printing
or
line feed.)
•
Conditions to make BUSY signal high .
(a) When the printer is feeding
of
printing.
(b) When the printer is
'in
DESELECT mode.
(c) When the printer
is
in FAULT state.
(d) When data received.
(e) When
PRIME signal
is
received.
._-
PE
•
Becomes high level when the printer is in
PE
state.
'SELECT
•
Signal to indicate whether the printer
is
in SELECT
or DESELECT mode. (Positive logic)
•
DATA can
be
input during SELECT.
•
Becomes high level when the printer
is
in
SELECT
mode.
38