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[mikey2001]

Ive seen a Rev. 4 A2000 that I am interested in buying but I thought I would ask for opinions here first on whether or not it would be a worthwhile purchase.

As far as I understand it, upgrading this machine would be difficult because it has non-standard processor and graphics slots. Has anyone else ever had an experience with this revision of the A2000?

Many thanks,

Mike

[shaf]

Which version of ther Rev. 4 Motherboard is it.

To fix the Processor slot problems add a 3.3K Ohm resistor between Pin 20 and pin 11 on U605 (74LS245) located near connector CN600.(Rev. 4.3 revision for A2000)

To fix the Video Connector problem connect U300 pin 10 to cn 203 pin 36. (Rev 4.1 revision for A2000)

To solve first keystroke problen delete C910/C911 (Rev 4.2)

RTC Problems - Reroute trace from U801 Pin 16 to Y800
- lift U801 pin 17
- add jumper from U801 Pin 16 to Y800
- add jumper from U801 Pin 17 to C810
(Revision 4.4)

Cheers

Shaf

[mikey2001]

It is a Rev. 4.0 motherboard.

[mikey2001]

Another thing I noticed was the differnt battery shape (an oblong compared to a barrel). Would this be more difficult to source, and if necessary replace? :-?

[mikey2001]

Please can anyone help me? :-? :-(

[amigamad]

Wish i could help you .Ive helped in keeping your thread at the top of the list . :-?

[kd7ota]

Well,

For the battery part, i thought they are all pretty much standard just as long as you keep the same amount of voltage to the board itself.

But if you want my personal opinion, I would aim for something such as an Amiga 3000, or even an Amiga 1200, just depends what exactly you want it to do.

Amiga 2000. I havent used one in real life yet, but I think its more to play the classic games.

[mikey2001]

Cheers for the replies people. :-)

@kd7ota

Yeah, thats what I mainly want it for, to play classic games and run classic s/w on it. I have a few other Amigas (see my sig and info), but they are all fairly high spec and I wanted a project I could work on that was not (too) technically advanced. :-)

[kd7ota]

Yea,

If its for retro stuff, then Amiga 2000 may be good. But for games to be classic, I usually would want a 68030 behind it at least. Some games at 7mhz just dont cut it. :-)

[Holley]

I have piles of games that won't run right on anything more than a plain 68k, hence my recent trials with a Rev 6.2 A2000 (plus a Rev 4.2 was my first Amiga).

With a harddisk and a couple of meg of fast mem a rev 4 board will make a nice retro machine.


ps. It's funny that on the motherboard the 1Mb Fat Agnus is labelled 'Fat Lady' :-)

[Lemmink]

An 4.0 A2000 board is rather for collecting then for using, as this revision was never publically sold. According to the entry in the big book it has a few quirks that stop it from practical use, above of all it does not have the typical square Agnus chip so you are stuck with 512k Chip-RAM.
And it hast the half lengh OCS-Videoslot.

I too recently got one of those for my collection buf havent tried if it is actually in working order.

The batteries seem to be a super "never leak" type.

[mikey2001]