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

[Azryl]

Some very nice hardware pr0n there

luv to see A500's recycled and reloved!

Az

[Azryl]

There is a word for that......  "female" :p

in old world terms.. a Flibbertigibbet !

Amiga should be priority, but I understand how other interests can be just as rewarding and time consuming, RC aeroplanes and helicopters share my hobby resources.

Az

[Azryl]

oh no! your one of those silly RC slippery mud drivers!

Az

[Azryl]

That is a great price for such a nice little monitor... well done!

Az

[Azryl]

Found the cause and Fixed it, the previous owner of my mobo had joined jp4 together - I fixed it today and now my miggy defaults to PAL and the correct clock speed 7.09Mhz.

I also found that the below settings on my GBS work fairly well with both PAL and NTSC:

Tweaked for: 800x600 res:
HPOS 50
VPOS 14
HSIZE 50
VSIZE 56
CLAMP ST 97
CLAMP SD 00

EDIT: and just discovered that PAL works with the GBS defaults now my miggy is running @ the correct clock-cycles! :p

Awesome!!

Az

[Azryl]

924k of chip ram after workbench loading is very good!

1meg fast ram is fine for most applications under WB3.1

[Azryl]

How much was the board made by kipper?

if it true autoconfigs then he has made a great a500 expansion!

Az

[Azryl]

I have some Rev5 mobo's as well... its the damn floppy drives that fail most often  need a few of those and I could rebuild some nice systems, a590 includes and AddiDE etc


Az

[Azryl]

Very cool. I should do this for my collection of c64's before they give trouble. Where did you get the replacements from?

Az

[Azryl]

I don't have any store local that sell electroic components, so I either drive 60kms to a Jaycar store or buy online.

Which is why I asked

Az

[Azryl]

Early SID chips need 9vac to work properly on the C64 Breadbin model. Check your voltages and amperes.

Az

[Azryl]

You might have also blown the MPU on each keyboard, that is the CPU controller that A500's have on the small circuit board. Bummer if you have! Not easy to find replacements or to replace.

Az

[Azryl]

I would suggest checking voltages at the keyboard connector. Too high or too low will cause problems and might be the reason behind the original keyboard becoming faulty.

Az

[Azryl]

Yes, a bad keyboard MPU can cause reboots of the A500. The keyboard has two keymaps for reading the current key pressed, this is why half of your keyboard seems to work and the other half is faulty.

If I remember correctly the MPU is a variant of 6502, with its own ram/rom and I/O functions just for the Amiga keyboards.

Az

[Azryl]

What did you clean the A600 with? Its color is very nice now

Az