My A500 "project" pics, details, build log?

[djos]

Yeah that all looks good - only thing to consider is, is the the HDD part of a single chain or is it on it's own internal chain.

You can tell by the cable coming from the controller, if it loops back to the PCB it's likely that to cut costs there is a single chain and the only thing to terminate is the external device.

[AmmoJammo]

no loop back?

http://amiga.resource.cx/photos/gallery/a590.jpg

internal cable just goes from the PCB to the HDD.

[djos]

no loop back?

http://amiga.resource.cx/photos/gallery/a590.jpg

internal cable just goes from the PCB to the HDD.

Ok, yep the internal drive does need to be terminated then - if you can find an internal active terminator that would be best practise. they usually look like this:



although most decent scsi HDD's did use active termination. :p (impossible to know for sure tho unless you can find a datasheet online)

[AmmoJammo]

As I mentioned before, the HDD has inbuilt active termination... can either be either bus powered, self powered, or provide power to the bus...

http://ftp://ftp.seagate.com/pub/acrobat/install_guides/hawk/67471c.pdf

It's set to self powered at the moment.

[djos]

As I mentioned before, the HDD has inbuilt active termination... can either be either bus powered, self powered, or provide power to the bus...

http://ftp://ftp.seagate.com/pub/acrobat/install_guides/hawk/67471c.pdf

It's set to self powered at the moment.

Ok, that's how i'd have configured it too - great manual, you dont see them like that anymore!

how thick and flexible is the scsi cable for the CD-ROM drive? the very flexible onse where usually only single shielded and very prone to issues, dual shielded or better is the best option (I have a couple that might be of use - only issue is they use the HD50 connectors).

[AmmoJammo]

I'm beginning to think there might be an issue with the 512k of ram on the Mega Midget Racer... :/

[djos]

Yeah that could easily cause the problem you are having as Copying files definitely uses any fast mem available.

Can you remove the ram chips and clean up the contacts (fine grit sandpaper works well) so see if it passes the mem-test then?

[AmmoJammo]

It only sometimes fails, Ive removed it from the startup sequence, still crashes.

[djos]

It only sometimes fails, Ive removed it from the startup sequence, still crashes.

try removing the midget all together?

[AmmoJammo]

Worked without the MMR... copied about 100 megs...

put the MMR back in... failz... :/

[djos]

Worked without the MMR... copied about 100 megs...

put the MMR back in... failz... :/

Bugger!

[AmmoJammo]

thought I might have been putting too much load on the powersupply, but the 5volt rail is at a pretty solid 4.9volts, 12volts is spot on 12...

[AmmoJammo]

tried clocking the MMR at 36Mhz, 33Mhz, and the stock 25Mhz... same issue...

doesn't work...

I think I might just pack the whole setup in a box and leave it alone :/

took a few photos:







I also had an "Orange screen of recoverability" :p
workbench said it was a recoverable error, then proceeded to reboot anyway...

[djos]

Do you have any other fast ram installed like tom's 8mb?

[AmmoJammo]

got the tomthul 8meg.

when I tried it without the MMR, I still had the tomthul ram, and had no issues...

WB3.1 won't run overly well with only 1 meg, so can't exactly try it without.

[djos]

True, how much ram is on the MMR and will it work with it removed?