Optional Rams; Optional Serial I/O - Brother HL-600 Service Manual

1.3.5

Optional RAMs

There are two types of optional RAM: the 1 Mbyte model and the 1.5 Mbyte model,
but even if the 1.5 Mbyte model is mounted in addition to a 1 M mode, only 2 Mbytes
in total will be recognized.
0.5 M model + 1
0.5 M model + 1.5 M optional RAM = 2 Mbytes
1 M model + 1
1 M model + 1.5 M optional RAM = 2 Mbytes
(01-05C) ICAS1
(01-09C) MA(9..0)
(01-07H) D(15..0)
1.3.6

Optional Serial I/O

The interrupt of serial I/O are input to the EXINT terminal of the ASIC, and are
recognized by the CPU. A 32-byte space for register is provided for this I/O,
which are read and written to by the CPU.
RESET
OPIRQ
SENTAN
EXVDO
SENSE
M optional RAM = 1.5 Mbytes
M optional RAM = 2 Mbytes
(01-05H) ROE
(01-05H) RWU
(01-05H) RWL
R18 0
(01-05F) XCAS0
(01-05F) XCAS1
(01-05C) RAS
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
+5V
C25
104
0V
Fig. 2.8
P3 OPTION I/F
17
RESET (01-01E)
2
OPTION (01-05C)
OPCS
13
(01-11F)
RD RD
1
(01-05B)
WR WR
30
A5
29
A4
15
A3
14
A2
28
A1
24
D7
9
D6
8
D5
23
D4
7
D3
21
D2
6
D1
5
D0
16
EXINT (01-03A)
27
RESIST (01)
22
RBD (01-02A)
BD
12
(01-04B)
EXVDO
20
LEDR LEDR (01-06C)
10
(01-04B)
SENSE
11
+5V
+5V
25
C34
+5V
26
104
+5V
18
0V
0V
4
0V
19
0V
3
0V
Fig. 2.9
II - 8
P2 OPTION RAM
30
OE
28
UW
27
LW
29
ICAS1
7
XCAS0
6
XCAS1
5
RAS
40
A0
39
A1
38
A2
37
A3
36
A4
35
A5
34
A6
33
A7
32
A8
31
A9
8
DQ1
9
DQ2
10
DQ3
11
DQ4
12
DQ5
13
DQ6
14
DQ7
15
DQ8
26
DQ9
25
DQ10
24
DQ11
20
DQ12
19
DQ13
18
DQ14
17
DQ15
16
DQ16
23
VCC
4
VCC
3
VCC
21
VSS
22
VSS
2
VSS
1
VSS
A(5..1) (01-08C)
D(7..0) (01-07C)