Amiga 1000 Kickstart Eproms/Roms

[TjLaZer]

So those 4 sockets are for ROM upgrades???  I guess they are 27C512 chips?

[TjLaZer]

a 27c256 is a 32k chip.  So how are 4 chips holding Kickstart 1.2? (256k)

[TjLaZer]

You know, these 4 chips looked familiar, so I just checked my Amiga chip stash bin and guess what?  I have these 4 chips and I did not know what they were for!  I copied them with my programmer.  So what do I need to do to get this working on my A1000?  Is there a way I can test the images to see if they are a valid kickstart?

[TjLaZer]

Tried and could not get it to work. (merged odd/even and combined files)

-edit-
I was right, these chips are 27C512!!!

[TjLaZer]

@Piru

Did you merge the roms to make a valid KS 1.2 file?  How did you do it?

[TjLaZer]

Well I tried to use WinHEX to do it manually and it did not come out right, was close but not valid. (I could see the copyright texts, etc but some letters were off a tad.)

I will try to install this in one of my spare A1000's.  It would be cool to have Kickstart 1.2 in ROM.  I would also like to try and do Kickstart 1.3, if I can figure out how to split the files properly!

[TjLaZer]

I pulled the jumpers at locations W2 and W4 and the machine won't boot (black screen), put them back in and it boots to a Workbench 1.2 prompt.

I think that will not work because I believe the two chips at locations U5N and U5P are boot ROMs for the kickstart disk.  By removing the jumpers the machine does not know how to load kickstart as it might be expecting the boot roms instead of half of Kickstart 1.2!

[TjLaZer]

DJBase wrote: I have an adapter which replaces Even/Odd and gives you a socket for a normal A500 Kickrom.

Can you elaborate on your adaptor?  Does it plug into the 4 sockets on the MB and provide a single A500/2000 style ROM socket? I might be interested in one.

[TjLaZer]

Thanks, how much for 1?

Also, are the other 2 sockets just extras?  Like in this set of 4 ROMs that I have.  Not sure how you can go from 4 sockets to 2 and it working.

[TjLaZer]

I wonder what happens if you do not do this step:

Replace the 20pin PAL 16L8A-2CN chip located at U6J on the WCS daughterboard with the new chip supplied in the kit