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Presented by: Only
On Saturday Night
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Only one serial port chip can be installed at one time
as the parts overlap on the board.
User will select their choice of serial port and place
the jumpers as appropriate.
Other jumpers are mentioned here.
The 8MB / 2MB selection is for folks who do not have 4MB
simms but do have 1MB simms.
The NoCan3-B does not have this selection and will work
with either SIMM type.
For those of you who will use this with an MPI, do not
address any chips into the $FF40 to $FF7F range.
Reason: the chips will fight with the MPI data bus buffer,
one will win and the other will loose, eventually.
The Order of the I/O Select Jumpers, On=jumper, Off=no jumper.
NoCan3 Positions:
6821 @ $FF60-$FF63 (bad for MPI)
16550 @ $FF10-$FF17
| NoSram |
BLK7 |
BLK3 |
BLK0 |
BLK4 |
BLK5 |
BLK2 |
BLK6 |
FAST |
BLK1 |
| On |
On |
Off |
On |
On |
On |
On |
On |
User |
On |
NoCan3-B Positions:
6821 @ $FF1C-$FF1F
16550 @ $FF10-$FF17
| BLK0 |
BLK1 |
BLK2 |
BLK3 |
BLK4 |
BLK5 |
BLK6 |
BLK7 |
FAST |
| Off |
Off |
On |
On |
On |
On |
On |
On |
User |
16550
6821
6551
SRAM
4MHz
8MB
NoCan3 16550 Address
Selections:
1=no jumper
0=jumper
Default = $FF10-$FF17
| 16550 Address: |
Selection: BLK6, BLK5, BLK4 |
| $FF10-$FF17 |
0 0 0 |
| $FF18-$FF1F |
0 0 1 |
| $FF30-$FF37 |
0 1 0 |
| $FF38-$FF3F |
0 1 1 |
| $FF60-$FF67 |
1 0 0 |
| $FF68-$FF6F |
1 0 1 |
| $FF70-$FF77 |
1 1 0 |
| $FF78-$FF7F |
1 1 1 |
Top
NoCan3 6821 Address
Selections:
1=no jumper
0=jumper
NoCan3-B Default - $FF1C-$FF1F
| 6821 Address: |
Selection: BLK3, BLK2 |
| $FF1x |
0 0 |
| $FF3x |
0 1 |
| $FF6x |
1 0 |
| $FF7x |
1 1 |
| 6821 Address: |
Selection: BLK1, BLK0 |
| $FFx0-$FFx3 |
0 0 |
| $FFx4-$FFx7 |
0 1 |
| $FFx8-$FFxB |
1 0 |
| $FFxC-$FFxF |
1 1 |
Top
NoCan3 6551 Address
Selections:
1=no jumper
0=jumper
Default = $FF18-$FF1B
| 6551 Address: |
Selection: BLK7, BLK6 |
| $FF1x |
0 0 |
| $FF3x |
0 1 |
| $FF6x |
1 0 |
| $FF7x |
1 1 |
| 6551 Address: |
Selection: BLK5, BLK4 |
| $FFx0-$FFx3 |
0 0 |
| $FFx4-$FFx7 |
0 1 |
| $FFx8-$FFxB |
1 0 |
| $FFxC-$FFxF |
1 1 |
Top
NoCan3 SRAM Jumper Selections:
1=no jumper
0=jumper
| $FF9B, bits 4 & 5 only: |
Selection: NoSRAM |
| Bits 4 & 5 of $FF9B = SRAM |
0 |
| Bits 4 & 5 of $FF9B = Direct |
1 |
Top
NoCan3 4MHz Jumper Selections:
1=no jumper
0=jumper
| 4MHz Selections: |
Selection: 4MHz |
| Disable 4MHz |
0 |
| Enable 4MHz |
1 |
Top
8MB or 2MB Selection:
1=no jumper
0=jumper
| Memory SIMMs: |
Selection: MB2 |
| 8MB, two each 4MB |
0 |
| 2MB, two each 1MB |
1 |
Top
This page updated 2000/05/08
