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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: TheFab77 on August 01, 2006, 12:03:17 AM

Title: A2000 unknow roms pcb
Post by: TheFab77 on August 01, 2006, 12:03:17 AM

Hi Guys,

One of my A2000 motherboard (rev. v4) has a strange multi roms PCB. Seems to be a kickstart switcher.

here some pictures:

http://img524.imageshack.us/img524/4965/rom1mp1.jpg (http://img524.imageshack.us/img524/4965/rom1mp1.jpg)

http://img524.imageshack.us/img524/2658/rom2is1.jpg (http://img524.imageshack.us/img524/2658/rom2is1.jpg)

If it's really a kickstart switcher anyone know how to use it ? There is no manual switch, so maybe there is a key to press on the keyboard when power on , but which one :-?

And how to identofy which versions of kickstarts are stored in these roms?


Thanks,
Fab.

Title: Re: A2000 unknow roms pcb
Post by: shaf on August 01, 2006, 01:55:51 AM

Hello,

It looks like the first NA releaase of the A2000 Motherboard.
The Rev 4.0's were very rare. Be thankful it's not a B2000 German Motherboard (only avail in Canada and Germany never releaaed in the US - that board only supported a 512KB Agnus Chip and couldnt be upgraded.)

I thinks the ROMs are for Kickstart 1.1.
All the later A2000/500 ROMs were a single chip using a larger pin array.

Shaf