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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Kernel on February 27, 2006, 05:06:34 PM
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Can someone direct me as to how to read the A3000 jumper settings? They seem to have an arrow around them but I'm not sure which end is actually pin #1 - the one at the back end of the arrow, or where it is pointing?
Also, I have a rev 6.1 motherboard with the 1.4 roms, but the system has a 68882 which to me means it is a 25MHz machine, yet sysinfo indicates otherwise. About .78 of a 25MHz if I remember correctly.
Can someone point me in the direction on how to make sure the board jumbers are set properly? I see stuff on the net, but I'm looking for a quick answer now and will delve deeper later tonight.
Thanks.
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look at the big book (http://www.amiga-hardware.com/)
for the jumbers. from the side of the arrow mark 1
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This (http://homepages.ihug.co.nz/~miles.j/amiga.html) is one of my favourites.
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Here is an image of the battery area after removal of the leaking battery. Anyone care to comment on the damage - do I need to do anything other then the cleaning with Alcohol I gave it?
(http://home.twcny.rr.com/kernel/images/a3000/battery.jpg)
Here are images of the CPU and MMU indicating they are 25MHz, yet SYSINFO reports less than that.
(http://home.twcny.rr.com/kernel/images/a3000/mmu.jpg)
(http://home.twcny.rr.com/kernel/images/a3000/cpu.jpg)
Here is an image of the 1.4 ROMS. One of the labels came off (glue death) during cleanig of the mobo and exposed the programmable wafers... I hope the light didn't hurt it.
(http://home.twcny.rr.com/kernel/images/a3000/14roms.jpg)
And lastly, here is an image of the underside of the board. It looks like something was spilled on it at some point; I cleaned as much as I could, but there is still a film on it. I can only call it "grunge"... anyone know what it is or if I need to worry about it?
(http://home.twcny.rr.com/kernel/images/a3000/grunge.jpg)
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I can't help with your chip questions, but I would Really REALLY like to know how you got such detailed pictures!
Even with the Macro setting on my Fuji digital camera, all my close-ups look like hairy caterpillers filmed through a tub of jelly!!!
I tried to get shots of some ram sticks to sell on ebay, and even I couldn't tell if it was a computer part, or a dog turd on a shagpile carpet. :lol: :lol:
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Nice pics, dammage doesnt look too bad. Personally, i use q-tips and isopropyl alcohol to clean boards.
My board looks similar to yours in regards to dammage. The copper fill around the battery on mine looks clean like on yours, but i had battery leak in a 4cm radius around the battery. Most bad dammage was on the leads of the dip sockets. I had to remove a socket. I didnt bother to replace it though, soldered the chip right onto the board.
Clean it as best you can and dont worry about it. If it works fine, thats great. If it eventually starts acting up, clean some more. Id say that eventually it will fail at some point.
as for getting closeup pix, i use an iSight(fire wire chat cam) on a mac with a program called Boinx Ivzeen. This program lets me manual focus the camera, and the camera does really good close shots.
Here is an example of a pic i made the other day, using the isight and manual focus + screen grab. Its of some wires i soldered to an IR tranceiver module.
(http://koft.net/pix/closeup.JPG)
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@Kernel
Do you have any fast ram? Not having some would slow down the 030
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Pics were taken at highest resolution on a Kodak digital camera (forgot exact model) and then resized in ACDSee and clipped to the area that I wanted to post.
The system has 4MB of FAST RAM... I am guessing that the A3000 in SYSINFO specs is a fully decked 18MB system, since I used to have one and it was 1.00 instead of the .77 I am getting - and it reports "Cook That RAM!".