Mouse & floppy problems on A500

[onemaddude]

Can anyone help with my problems


Mouse
One of my A500s (rev 6 board)
move the mouse in any direction and it goes down and right - no up or left
i have tried two mice with the same problem.

The mice work fine on another A500

Floppy
Same A500 put in a disk eg "Workbench" and after much clicking as if loading tell mes the disk is "Not a DOS disk" but use an old demo etc which isn't a standard disk format and it will load it happily.
I can use an external to load the same DOS disk so dont think its the disk

Can anyone help/advise

[lost_loven]

try swapping around the cia chips and see what that does.

lost

[onemaddude]

Tried that no joy
on the good news side I have got it working with a serial mouse
Thanks for the idea - I thought that was only for serial/printer problems

[lost_loven]

The cia chip's (one of them) does help with mouse joystick control and floppy. I think maybe paula chip ( i could be wrong, maybe gary) has some thing to do with floppy as well as sound. try swapping that too!

lost

[lost_loven]

http://en.wikipedia.org/wiki/Amiga_custom_chips
good reading on chips and links to chip sets and functions!

lost

[mongo]

Can anyone help with my problems


Mouse
One of my A500s (rev 6 board)
move the mouse in any direction and it goes down and right - no up or left
i have tried two mice with the same problem.

The mice work fine on another A500

Floppy
Same A500 put in a disk eg "Workbench" and after much clicking as if loading tell mes the disk is "Not a DOS disk" but use an old demo etc which isn't a standard disk format and it will load it happily.
I can use an external to load the same DOS disk so dont think its the disk

Can anyone help/advise

The mouse problem could be caused by U15. It's a 74ls157. It could be bad, or there might be a problem with the connection between pin 4 on U33 and pin 1 on U15.

The floppy problem is most likely a dirty or dying drive.

[onemaddude]

OK will give them a try later

[onemaddude]

still no joy looks like i will have to either find another serial mouse driver or register the one i have.