Cfn3 cpu board, Switches – Gasboy CFN III Quick Reference Guide v3.3 User Manual
Page 23
CFN III Quick Reference
MDE-4483 CFN III Quick Reference Guide v3.3 · August 2005
Page 19
CFN3 CPU Board
Assembly part number: C05838.
Switches
PC Address Switch, SC-COMM CPU - S1
On the CPU board, card edge side, Switches 1-4, the
PC address DIP sets where in the PC address space
the Dual RAM will occur. The SC-Comm board
currently assumes D0000.
Switch
Address
1
2
3
4
C0000
cl
cl
cl
cl
C3000
cl
cl
cl
op
C6000
cl
cl
op
cl
C7000
cl
cl
op
op
CC000
cl
op
cl
cl
CF000
cl
op
cl
op
D0000*
cl
op
op
cl
D3000
cl
op
op
op
D6000
op
cl
cl
cl
D9000
op
cl
cl
op
DC000
op
cl
op
cl
DF000
op
cl
op
op
E0000
op
op
cl
cl
E3000
op
op
cl
op
E6000
op
op
op
cl
E9000
op
op
op
op
* = default
Switches 5-8 enable the IRQ. Choose one of the four
possible interrupt priorities. Only one may be
selected and no other device on the PC can use that
interrupt. SC3.EXE assumes level 10. Other choices
are 15, 11, and 12
5
Closed IRQ - 15
Default - open
6
Closed IRQ - 12
Default - open
7
Closed IRQ - 11
Default - open
8
Closed IRQ - 10
Default - closed*
SC3 Comm Board DIP Switch, CPU - S2
Position 4 - UP (open), default signon.
Previous PC SC -COMM settings
Boards produced for the CFN3 prior to surface mount
have a separate IRQ (S1) and Address (S2) switch
settings. The CPU is S3. These are listed below.
PC IRQ Switch, SC-COMM CPU - S1
On the SC-COMM CPU board on the card edge side,
middle DIP switch is the IRQ enable DIP switch. The
IRQ enable switch chooses one of the four possible
interrupt priorities. Only one may be selected and no
other device on the PC can use that interrupt.
SC3.EXE currently assumes level 10. Other choices
are 15, 12, and 11.
1
Closed IRQ - 15
Default - open
2
Closed IRQ - 12
Default - open
3
Closed IRQ - 11
Default - open
4
Closed IRQ - 10
Default - closed
PC Address Switch, SC-COMM CPU - S2
On the CPU board, card edge right, the PC address
DIP sets where in the PC address space the Dual
RAM will occur. The SC-Comm board currently
assumes D0000.
Switch
Address
Switch
Address
Cl cl cl cl
C0000
op cl cl cl
D6000
Cl cl cl op
C3000
op cl cl op
D9000
cl cl op cl
C6000
op cl op cl
DC000
cl cl op op
C7000
op cl op op
DF000
cl op cl cl
CC000
op op cl cl
E0000
cl op cl op
CF000
op op cl op
E3000
cl op op cl
D0000*
op op op cl
E6000
cl op op op
D3000
op op op op
E9000
SC3 Comm Board DIP Switch CPU - S3
SC3 Comm Board DIP Switch CPU - S3, position 4,
default signon.