On Mon, 13 Dec 1999, Ken Caldwell wrote:
> I recently picked up a SCSI card at the North Rocks markets. It is
> marked AHA1540B/42B and one of the large ICs has a 1542 sticker on it.
>
> Does anyone have any doco on this card? There are several rows of pins
> which take jumpers, vis: J5, J6, J7, J8 and J9 having 13, 5, 8, 8 and 13
> positions each which is a bit much to experiment with by trial and
> error!
As luck would have it, I happen to have a couple of these cards, and a
genuine Adaptec made manual for same. Anyone who isn't interested should
tune out now, and press D.
The jumpers are as follows - pin 1 at the top of the list down to whatever
the jumper block finishes at.
J5 - located horizontally directly beneath the 50 pin internal conenctor.
Pin 1 pair is the leftmost pair of pins.
Pin Function
1 Synchronous Transfer
2 Diagnostics
3 SCSI Parity
4 SCSI Address ID0
5 SCSI Address ID1
6 SCSI Address ID2
7 DMA Channel 0 } J9 must also be set
8 DMA Channel 1 }
9 Interrupt Channel 0 }
10 Interrupt Channel 1 } J9 must also be set
11 Interrupt Channel 1 }
12 DMA Transfer Speed
13 DMA Transfer Speed
The defaults for this block of pins are as follows
8 on, 10 on, all others off.
In all cases, an x means the jumper is installed.
SCSI Address is set as follows, and is the CARD address.
Pin Pair SCSI
4 5 6 Address
--------------------------------
0 0 0 7 {Default}
x 0 0 6
0 x 0 5
x x 0 4
0 0 x 3
x 0 x 2
0 x x 1
x x x 0
{It's a reverse binary mapping}.
DMA channel is set as follows
Pin Pair DMA
7 8 Channel
--------------------------------
0 0 7
x 0 6
0 x 5
x x 0
Default - DMA 5
{See also JP9 for DMA req and ACK channels}
Interrupt is set as follows
Pin Pair IRQ
9 10 11 Channel
-------------------------------
0 0 0 9
x 0 0 10
0 x 0 11
x x 0 12
0 0 x 14
x 0 x 15
Default - IRQ 11
DMA Transfer Speed
Pin Pair DMA transfer
12 13 speed
------------------------------------
0 0 5.0 MB/s
x 0 5.7 MB/s
0 x 6.7 MB/s
x x 8.0 MB/s
Default - 5.0 MB/s
Jumper set J6
Pin Function
1 BIOS Enable
2 Spare
3 Spare
4 Spare
5 Disable Auto Sense
Jumper set J7
Pin Function
1 Floppy Secondary Address
2 Port Address Select bit 0
3 Port Address Select bit 1
4 Port Address Select bit 2
5 Wait State bit 0
6 Wait State bit 1
7 BIOS Address Select bit 0
8 BIOS Address Select bit 1
JP7 is set as follows. Pin set 1 is the top set of pins.
Pin Pair AT Port
2 3 4 Address
-------------------------------
0 0 0 334H
0 0 x 330H
0 x 0 234H
0 x x 230H
x 0 0 134H
x 0 x 130H
x x 0 Not Used
x x x Not Used
Default for the 1540/1542BS11 card is 334 hex. Default for everything else
is 330 hex.
Pin Pair BIOS Wait
5 6 Delay {ns}
---------------------------------
0 0 0 (IOCHRDY not driven)
x 0 100 ns
0 x 200 ns
x x 300 ns
Default is wait states disabled.
Pin Pair BIOS Base
7 8 address
----------------------------------
0 0 DC000
x 0 CC000
0 x D8000
x x C8000
Default is DC000 hex.
Jumper Set J8 {Present only on 1542B - not on 1540B - used for floppy
controller}. Pin 1 leftmost pin, located just above J9.
Pin Function
1 Floppy enable
2 DREQ2
3 DREQ3
4 DACK2
5 DACK3
6 IRQ6
7 IRQ10
8 Dual Channel Speed
Defaults are floppy enabled, dreq2/dack2, irq6
Jumper Set J9 - horizontal, pine set 1 is leftmost pin.
Pin Function
1 Not used
2 DREQ Channel 5
3 DREQ Channel 6
4 DREQ Channel 7
5 DACK Channel 0
6 DACK Channel 5
7 DACK Channel 6
8 DACK Channel 7
9-13 Not Used
Note - the DREQ/DACK channel selected MUST match the DMA setting selected
at J5. Defaults are DREQ 5, DACK 5.
Phew. Hope that's all. Sorry it was so long. Have fun.
DaZZa - off to recompile his kernel
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