140 Series switch settings


There are switches on various boards that control the system configuration. This is an attempt to explain some of them.

CPU switches

The CPU has two DIP switches: SW1 (5-position) and SW2 (8-position). The four toggle switches are used for diagnostic programs.

SW1
As far as I know, this switch is ignored.

SW2
1
 ON if 125A
2
 Not Used
3
 ON if BASIC is supported*
4
 ON if Alliance system
5
 ON if P-Band is supported (Peripheral Band, coax-over-WangNet)
6
 Not Used
7
 Not Used
8
 Not Used
* If this is OFF, when Office Basic is installed, it will delete the development tools upon completion. Turn this on before you install Basic, and it leaves these tools installed.

SMD/CMD controller

There are two switches. Each half of each switch defines the settings for one of the ports. They are labelled on the board as to which switch half represents which port.
1234 or 5678
 Disk drive type
1 0 0 0
 67 MB Removable SMD
0 1 0 0
 255 MB Removable SMD
1 1 0 0
 26 MB Fixed CMD
0 0 1 0
 54 MB Fixed CMD
1 0 1 0
 80 MB Fixed CMD
Turn the bits around, (1234->4321) and you can see that they represent a drive ID number. I know that there is a #6 (60) and #7(70) also.

Winchester fixed disk controller

There is only one switch on this board.
1 2 3 4
 Drive Type
1 0 0 0
 3.0 MB (OIS-105)
0 1 0 0
 4.2 MB (105-1,115-1,130B)
1 1 0 0
 8.4 MB (115-2, 130C)
0 0 1 0
 16.8 MB (115-3,130D)
1 0 1 0
 33.6 MB (115-4,130E)
These bits represent the high four bits of a drive ID (14,24,34,44 and 54).

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