[Coco] Yet another SCSI problem.

[Mark Marlette]

Leon,

Please provide more information.

What interface, what software are you using?

SCSI is reliable. Termination? IDs set proper?

A simple test for drive selection is to poke the data register of your  
SCSI interface with the bit weight of the SCSI's ID you are trying  
address.

In the TC^3 it would be this....

POKE &HFF74,1     'this is for SCSI ID 0 test
POKE &HFF75,0     'send out to the drive

At this point the drive light should come on and stay on. If not then  
you don't have the proper drive selected. SCSI ID 1 = 2, 2=4, 3=8,  
4=16, etc.....

If the drive responds via the light, you will have to reset the  
bus(RESET) to get it to deselect. Test complete.......Can't get much  
simpler. :)

Regards,

Mark

Quoting Leon Howell <puritan_2076 at yahoo.com>:

> This is getting ridiculous. I thought SCSI was supposed to be reliable! Or is
> it just that I'm so dumb?
>
> I transplanted my CD-RW drive fron a modern plastic case to an older style
> metal case because it will stack neatly on top of my FD-502 case and take up
> less desk space.
>
> It worked before I transplanted it. Now it doesn't. Why? I suspect I
> reconected the drive select button wrong. How do I tell how to properly
> connect it? I thought it would respond as drive 0 if there was no   
> drive select
> button or jumper, but it doesn't. What's wrong?
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>