6 serial port 1 mode select (sw1-8) – SMC Networks 486DX4 User Manual
Page 54
AR-B1462 User¡
¦s Guide
6-4
(2) Disk Drive Name Arrangement
If any logical hard disk drives exist in your system, there will also be a different disk number depending on which
version DOS you are using.
The solid state disk drive number with there respective DOS drive designation are listed in table as follows. The
solid state disk drive number is changeable as the DOS version. The following table expresses the variety.
Floppy disk No.
Logical hard disk
Condition
0
1
2
3
1
2
3
4
No Logical hard disk
A:
B:
C:
D:
--
--
--
--
1 Logical hard disk
A:
B:
C:
D:
E:
--
--
--
2 Logical hard disk
A:
B:
C:
D:
E:
F:
--
--
3 Logical hard disk
A:
B:
C:
D:
E:
F:
G:
--
4 Logical hard disk
A:
B:
C:
D:
E:
F:
G:
H:
Table 6-5 SSD Drive Number for DOS Version before 5.0
Floppy disk No.
Logical hard disk
Condition
0
1
2
3
1
2
3
4
No Logical hard disk
A:
B:
C:
D:
--
--
--
--
1 Logical hard disk
A:
B:
D:
E:
C:
--
--
--
2 Logical hard disk
A:
B:
E:
F:
C:
D:
--
--
3 Logical hard disk
A:
B:
F:
G:
C:
D:
E:
--
4 Logical hard disk
A:
B:
G:
H:
C:
D:
E:
F:
Table 6-6 SSD Drive Number for DOS Version 5.0 and Newer
6.2.5 ROM Type Select (SW1-6 & SW1-7)
SW1-6 & SW1-7 are used to select the memory type of ROM disk section.
SW1-6
SW1-7
EPROM Type
OFF
OFF
UV EPROM (27Cxxx)
ON
OFF
5V FLASH 29Fxxx (*Note)
OFF
ON
5V FLASH (29Cxxx & 28Eexxx)
ON
ON
12V FLASH (28Fxxx)
Table 6-7 ROM Type Select
NOTE: It is also used to perform the hardware write protection of small page 5V FLASH (29Cxxx or 28Eexxx) disk.
6.2.6 Serial Port 1 Mode Select (SW1-8)
SW1-8 is used to select the interface mode of serial port 1.
SW1-8
Serial Port 1
OFF
RS-232C (*)
ON
TTL
Table 6-8 Serial Port 1 Mode Select