Tf534 problem with IDE speed

[kulamario]

Yes this I know I got only 1mb chip but I mean about more stable
I bought yesterday 1mb agnus 8372a and now I start afraid waste money

[Lynxman]

if You install 8372 - You will not need this additional refresh circuit anymore and Your Amiga will run more stable, but You will have 1MB of Chip ram, wich isn't enough for some games and programs..

? How do you get 1 MB chip without an expansion?

[8 Bit Dreams]

Be careful while removing Agnus if You don't have a proper plcc extractor. you can push Agnus out of the socket from underside, there are two holes in the motherboard.
Remove PCB and wire and then reset jumpers to 8372 settings, and You'll be good.
Adding trapdoor expansion will increase risk of instability as ram timings will be slightly shifted. this is something we had on TF530 build with PeteAUs expansion where GARY adapter for SlowRAM was used..

[8 Bit Dreams]

? How do you get 1 MB chip without an expansion?

A. by removing existing chips and installing bigger ones,
B. By solderind additional 4 ram chips

http://www.amibay.com/showthread.php?47 ... e-H-W-pr0n!

[kulamario]

Can I use this from A501 board ?

[8 Bit Dreams]

Adding trapdoor expansion will increase risk of instability as ram timings will be slightly shifted. this is something we had on TF530 build with PeteAUs expansion where GARY adapter for SlowRAM was used

We are going in circles

[kulamario]

i mean about just chips from A501
no connect A501 to amiga

[Lynxman]

I didn't know replacing the existing chips with bigger ones would work without more mods. My Rev 5 doesn't have unpopulated RAM holes. I will consider that if I cant' get the expansion to work reliably.

[8 Bit Dreams]

Replacing 4 existing chips with bigger ones was meant to @kulamario's rev.6
Rev.5 Motherboards need more modifications to make it possible

[kulamario]

Can u tell me what exactly use for this please