Q170226E01.pdf - 第317页
RH5 8.3 List of Jumper Switch Settings SERVICE MANUAL 8.3−20 DA3SEC−85−540−B0 I/O port address Data Bit IN/OUT Signal Logic “0” Logic “1” D7 OUT Centronics printer DA T A8 0 1 D6 OUT Centronics printer DA T A7 0 1 D5 OUT…
8.3 List of Jumper Switch Settings
SERVICE MANUAL
RH5
8.3−19
DA3SEC−85−540−B0
System port MB89363B
This port is provided to perform I/O for data that each LSI can’t process by itself.
I/O port
address
Data
Bit
IN/OUT Signal Logic “0” Logic “1”
D7 IN 8onSW4 ON OFF
D6 IN 7onSW4 ON OFF
D5 IN 6onSW4 ON OFF
20H
D4 IN 5onSW4 ON OFF
20H
D3 IN 4onSW4 ON OFF
D2 IN 3onSW4 ON OFF
D1 IN 2onSW4 ON OFF
D0 IN 1onSW4 ON OFF
D7 IN Host interface CI signal Call accepted Call−not−
accepted
D6 IN Host interface CTS signal Clear to send Not clear to
send
22H
D5 IN Host interface CD signal Receive carrier
detection ON
Receive carrier
detection OFF
22H
D4 IN WD33C93 INTRQ signal Not interrupt Interrupted
D3 IN NMI factor SW YES NO
D2 IN NMI factor PFIN NO YES
D1 IN NMI factor WDT NO YES
D0 IN NMI factor ERROR NO YES
D7 OUT RAM bank switching SRAM DRAM
D6 OUT Printer strobe signal mask Release Mask
D5 OUT TTY leader start signal ON OFF
D4 OUT NMI factor mask signal Release Mask
24H
D3 OUT Buzzer output (externally connected at
CN6)
ON OFF
D2 OUT Enable interrupt from host TRY Disabled Enable
D1 OUT Enable interrupt from host EMP Disabled Enable
D0 OUT Enable interrupt from host RRY Disabled Enable
26H Mode setting 92H
RH5
8.3 List of Jumper Switch Settings
SERVICE MANUAL
8.3−20
DA3SEC−85−540−B0
I/O port
address
Data
Bit
IN/OUT Signal Logic “0” Logic “1”
D7 OUT Centronics printer DATA8 0 1
D6 OUT Centronics printer DATA7 0 1
D5 OUT Centronics printer DATA6 0 1
28H
D4 OUT Centronics printer DATA5 0 1
28H
D3 OUT Centronics printer DATA4 0 1
D2 OUT Centronics printer DATA3 0 1
D1 OUT Centronics printer DATA2 0 1
D0 OUT Centronics printer DATA1 0 1
D7 IN 4onSW5 ON OFF
D6 IN 3onSW5 ON OFF
D5 IN 2onSW5 ON OFF
2AH
D4 IN 1onSW5 ON OFF
2AH
D3 IN BUSY signal for TTY BUSY
D2 IN Centronics printer BUSY signal BUSY
D1 IN Centronics printer ERROR signal ERROR
D0 IN Centronics printer PE signal PE
D7 OUT Centronics printer STB signal ON OFF
D6 IN Centronics printer ACK signal ACK
D5 OUT Centronics printer INIT signal OFF ON
2CH
D4 OUT Centronics printer SLCT IN signal OFF ON
2CH
D3 OUT Centronics printer interrupt INT
D2 OUT LED output LD1 ON OFF
D1 OUT LED output LD2 ON OFF
D0 OUT LED output LD3 ON OFF
2EH Mode setting A2H
=REFERENCE=
Logic 0 and 1 indicate logic signal status when the CPU performs signal I/O as data.
8.3 List of Jumper Switch Settings
SERVICE MANUAL
RH5
8.3−21
DA3SEC−85−540−B0
Floppy disk interface(FDC) WD37C65
The WD37C65 is an FDC with built−in VFO capable of supporting up to 4 floppy disk drives and a floppy
disk drive interface driver/receiver.
Software is P PD765A compatible.
Command
I/O port
address
R/W
Operation resistor (LDOR) 40 W
Control register (LDCR) 42 W
Main status register read 48 R
Data register read 4A R
Data register write 4A W
Switch read 4C R
Control register write 4C W
(1) Operation register
D7
D6 D5 D4 D3 D2 D1 D0
OR7 OR6 OR5 OR4 OR3 OR2 OR1 OR0
(MSEL) (X) MOEN2 MOEN1 DMAEN SRST (X) DSEL
(2) Control register
D7
D6 D5 D4 D3 D2 D1 D0
* * * * * * OR1 OR0
*: Any setting is OK
CR1
CR0 Drive Baud rate Content
0
0
0
0
1
1
1
0
0
1
1
0
0
1
x
x
0
1
x
x
x
500 K
250 K
250 K
300 K
250 K
125 K
125 K
MFM
FM
MFM
MFM
MFM, RST (Factory setting)
FM, RST (Factory setting)
FM