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

[djos]

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

[AmmoJammo]

only 512k on the MMR.. makes no difference if its installed, removed, setup, or not setup... it still crashes... so its not the 512k on the MMR that's the issue, it's probably the MMR not working properly with the A590 scsi controller...

the MMR won't work in 68000 fall back mode at all with the A590, to boot from the HDD, with the 68000, I had to completely remove the MMR.

[djos]

Ah, might be time to retire the MMR and wait for the Zeus68k or aca500 to arrive.

[AmmoJammo]

Pulled the fpu, still crash.

Now Ive removed the fpu and tom thul, reenabled the 1meg in the a590 and we shall see what happens.

[AmmoJammo]

And the update:

TomThul 8meg + Mega Midget Racer + A590 SCSI controller = no

-TomThul = yes....

it appears to work flawlessly without the tomthul 8meg.... most FRUSTRATING PIECE OF HARDWARE EVER!

[djos]

lol, have you inspected the MMR for dodgy solder joints etc?

[AmmoJammo]

There's nothing wrong with the MMR...

I've decided the best place to install the TomThul 8 meg, is here:


It's totally unreliable, and apparently not compatible with much more than a stock A500...

I guess that's what happens when you try to mix old with new :/

With the 512k inbuilt, 512k trapdoor, 512k on the MMR, and 1meg in the A590, it seems perfectly stable.

[Lurch]

It's totally unreliable, and apparently not compatible with much more than a stock A500...

I guess that's what happens when you try to mix old with new :/

With the 512k inbuilt, 512k trapdoor, 512k on the MMR, and 1meg in the A590, it seems perfectly stable.

Have the same trouble with the exact same 8MB mod from Tom :-) Works fine with just the A590 but causes the same MMR fault you are having when I use the HARMS card.

Thought it was faulty RAM and bought some more ZIP RAM, same problem. Strange as the RAM on the card is 32bit and in a higher memory range than Tom's.

Although removing it didn't solve my speed issue LOL

[AmmoJammo]

and only just NOW you decide to tell me this? lol

[djos]

I've got one of Kipper's auto-config 8mb boards in the mail now and Im fairly certain it'll solve some issues I have - from my testing in WinUAE it seems that you need an auto config fast ram board to prevent the OS from wasting half your chip-mem!

[Lurch]

and only just NOW you decide to tell me this? lol

LOL I know slack on my part hahaha :-)

[AmmoJammo]

and now WHDLoad doesn't work...

games just flash to a black screen every few seconds, sometimes at the same time as the power light flashes...

*sigh*

CD Rom works well though!

[AmmoJammo]

Apparently the flashing is due to insufficient ram.
Well, ah, yeah, makes sense, dont have a solution though!

[djos]

When I get my auto config 8mb board ill bring it over if you like to see if that works?

[AmmoJammo]

When I get my auto config 8mb board ill bring it over if you like to see if that works?

might be worth a try... how far away is it? :p

I found the tomthul to not work at all between the accelerator and motherboard, but worked to some extent plugged into the accelerator..

Not sure how well Klippers would fit on the accelerator... Really want/need more 32bit ram anyway

[djos]

Kipper mailed it to me last week

As you say worth a try, fun to experiment anyway.