Amiga 500 4/8mb fastmem boards with IDE

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9th July 2014, 14:20
Imperious

Quote:

Originally Posted by xianti

Quote:

Originally Posted by xianti

Quote:

Originally Posted by kipper2k

Hi,

Yellow screen, black screen, and also the Amiga fault screen is an indication of bad connection of the CPU to motherboard, normally it is the right hand side pins of the CPU that cause the issue due to the Caps that may be higher on one motherboard than another, try removing the adapter, and use the socket from that on the bottom of the fastmem board and plug that into the motherboard and see what happens, also check the solder joints of the CPU socket on both the adapter board and the fastmem board to see if they are solid, check pins as well, make sure none broke/missing, if you can't get it going, no worries, send it back and i will replace it. Also try without using the 2 pin wire connected and see if the computer boots and RAM visible

@Xianti,

Take a picture of the board installed so i can see your wire connections

I'm away from home till Wednesday so i will look after new requests then

I think I must have broken your board ( static?) as it now doesn't work with either ks version. Grey for 1.3 And yellow for 3.1 . I'll take some pictures tonight however and post them anyway ...

Finally able to do some more tests!

I got a couple more strips and tried without the CPU board and no luck

Also tested with another Amiga, same revision 6a and no joy :(

I got a rev6a motherboard from Amigakit late last year so popped out the original rev5 board my A500 was born with. I sorted out my eprom burning issues by borrowing a professional programmer
from a workmate. Next wired up switches to switch between 1.3/3.1 and 1mB chipram and 512k chip/512k slow.
Had forgotten how to load classic workbench after more than 6 months so rewatched all the Youtube clips, etc.

The point is that initially all was working fine, albeit with the odd crash or error. There were 2 things I wasn't happy with, there is a capacitor that "will" short out on the CF IDE chip socket pins if not insulated, and the other
thing was that my new mobo had green corrosion on cpu socket pins 63 and 64. Initially I just put some electrical tape on the capacitor but realised that the 8mb ide board was not sitting straight. So I removed the pcb
and extended the capacitor pins to bend it out of the way. Would have been easier to just put a new cap there I guess.
At the same time I cleaned the corrosion off the cpu socket pins. Upon turning the Amiga on all I got was a black screen, by then it was nearly midnight so went to bed a bit peeved.

It turned out that after cleaning the corrosion off the socket pins the 32pin header supplied with the 8mb ide card wasn't making good contact. I proved this by inserting a spare 68000 cpu into the
header and turned the computer on to a black screen. Then I removed the header and inserted the cpu into the original mobo socket, all good and working.
I had to bend out the spring part of pins 63 and 64 on the socket so the 32pin round pins would make proper contact.

My Amiga is now working heaps better without the crashing and errors I was getting before. As Kipper has mentioned most problems are likely being caused by poor connections at the cpu socket.
I believe in electronics that if You mess with something and afterwards it doesn't work, it's probably not just a coincidence.

http://i57.tinypic.com/10zsape.jpg

http://i61.tinypic.com/r06mvl.jpg

http://i57.tinypic.com/2qv76o0.jpg

http://i60.tinypic.com/5360sk.jpg

http://i58.tinypic.com/2mhhs20.jpg
13th July 2014, 21:01
xianti

Quote:

Originally Posted by Imperious

Quote:

Originally Posted by xianti

Quote:

Originally Posted by xianti

I think I must have broken your board ( static?) as it now doesn't work with either ks version. Grey for 1.3 And yellow for 3.1 . I'll take some pictures tonight however and post them anyway ...

Finally able to do some more tests!

I got a couple more strips and tried without the CPU board and no luck

Also tested with another Amiga, same revision 6a and no joy :(

I got a rev6a motherboard from Amigakit late last year so popped out the original rev5 board my A500 was born with. I sorted out my eprom burning issues by borrowing a professional programmer
from a workmate. Next wired up switches to switch between 1.3/3.1 and 1mB chipram and 512k chip/512k slow.
Had forgotten how to load classic workbench after more than 6 months so rewatched all the Youtube clips, etc.

The point is that initially all was working fine, albeit with the odd crash or error. There were 2 things I wasn't happy with, there is a capacitor that "will" short out on the CF IDE chip socket pins if not insulated, and the other
thing was that my new mobo had green corrosion on cpu socket pins 63 and 64. Initially I just put some electrical tape on the capacitor but realised that the 8mb ide board was not sitting straight. So I removed the pcb
and extended the capacitor pins to bend it out of the way. Would have been easier to just put a new cap there I guess.
At the same time I cleaned the corrosion off the cpu socket pins. Upon turning the Amiga on all I got was a black screen, by then it was nearly midnight so went to bed a bit peeved.

It turned out that after cleaning the corrosion off the socket pins the 32pin header supplied with the 8mb ide card wasn't making good contact. I proved this by inserting a spare 68000 cpu into the
header and turned the computer on to a black screen. Then I removed the header and inserted the cpu into the original mobo socket, all good and working.
I had to bend out the spring part of pins 63 and 64 on the socket so the 32pin round pins would make proper contact.

My Amiga is now working heaps better without the crashing and errors I was getting before. As Kipper has mentioned most problems are likely being caused by poor connections at the cpu socket.
I believe in electronics that if You mess with something and afterwards it doesn't work, it's probably not just a coincidence.

http://i57.tinypic.com/10zsape.jpg

http://i61.tinypic.com/r06mvl.jpg

http://i57.tinypic.com/2qv76o0.jpg

http://i60.tinypic.com/5360sk.jpg

http://i58.tinypic.com/2mhhs20.jpg

Thanks imperious for the advise .

I think you're correct however my soldering skills are very raw... So I think its time to practice on some junk before I attempt anything on my amiga! nevertheless it should be fun :D
6th August 2014, 22:02
Nori

Declaring interest in a 4Mb one, for Amiga 500.
17th September 2014, 08:30
velourfog

Sorry if this has been answered in this very long thread but.. do these boards have a disable jumper for the RAM?
And, can the 8MB version be jumpered to 4MB etc? Thanks.
17th September 2014, 17:52
ajack

Quote:

Originally Posted by velourfog

Sorry if this has been answered in this very long thread but.. do these boards have a disable jumper for the RAM?
And, can the 8MB version be jumpered to 4MB etc? Thanks.

There is no disable jumper for RAM or a switch to toggle between 4/8mb RAM. Not in my A508IDE anyway!
21st September 2014, 03:01
squareeyes

Declaring interest in 8mb board please.
thanks
5th December 2014, 13:19
CrashMidnick

Can someone tells me where I need to connect the wires on an A1000 motherboard ? Thanks for your help.
8th December 2014, 18:28
kipper2k

I don't have an A1000 check out this url...

http://www.ianstedman.co.uk/downloads/Zorro2-pins.txt i believe you want pins 17 and 19. same as the other amigas
8th December 2014, 18:44
Astrofra

Dear Kipper2k,
is your "Amiga 500 8mb fastmem board with IDE" compatible with a CDTV?
Your website says yes, but I was unsure if the IDE was available as well when the board is installed on a CDTV?

I sent you an email about that, but I can imagine how much you're busy :)
Anyway, if your board is compatible with the CDTV (8mb ram + IDE), I'm declaring interest for one.
8th December 2014, 18:54
kipper2k

Hi,

check this url...

http://www.kipper2k.com/amigaforsale/CDTV/

You need to tie into Int2 and OVR signals on the motherboard to enable the IDE. If you would like one send me a PM for ordering info

Quote:

Originally Posted by Astrofra

Dear Kipper2k,
is your "Amiga 500 8mb fastmem board with IDE" compatible with a CDTV?
Your website says yes, but I was unsure if the IDE was available as well when the board is installed on a CDTV?

I sent you an email about that, but I can imagine how much you're busy :)
Anyway, if your board is compatible with the CDTV (8mb ram + IDE), I'm declaring interest for one.

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