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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: locutus on October 21, 2003, 05:49:32 PM
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Hello, i wanted to ask what kind of ROM's are used in the A3000/4000/1200, i wanted to experiment with writing my own ROM's for the Amiga etc. , but to do that i would need to know what kind of ROM's it are.
*hopes not to get flamed*
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You mean Kickstart Rom ? I had 3.0/3.1 in my A4000, and 1.3 in my A500..
Not sure why you think you'll get flamed for writing your own rom ? :-?
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I think he is asking what type of roms are used.
EG:
PLCC 32 4 meg ROM
So he can replace the Amigas ROMS with a custom programmed one.
A1200 has 2 40PIN DIL ZIF ROMS 256K each IIRC
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There's a design for a flashrom board on Aminet. It's for the 500/2000 rather than the 3000/4000/1200. I suppose you could modify it..
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JurassicCamper wrote:
I think he is asking what type of roms are used.
EG:
PLCC 32 4 meg ROM
So he can replace the Amigas ROMS with a custom programmed one.
A1200 has 2 40PIN DIL ZIF ROMS 256K each IIRC
I was more thinking about what kind of ROM's it are as in model, like "24C128" etc. not the Package type
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Hi, all kickstart after 1.3 need 512 kb (the A1200 use 2 x 256 kb to maintain 32 bits compability....).
Do you want to finish the yeah old and buggy kick 3.5 ?
Or want to rewrite the new kickstart v50 for A4000+CPPC for AOS 4 ?? ;-)
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Well, at the bottom of this (http://www.amiga-stuff.com/hardware/2mbit-maskrom.html) page there is some info regarding the ROM-types. Pinouts and soforth
At gregdonner.org (http://www.gregdonner.org/workbench/wb_31.html) there is a lot of info on the ROM's aswell.
What are you going to do? :-o
*me curios*
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I've read that the following will work. Unfortunately, they're rare expensive chips. So, building an adapter for a more common chip might be a better solution. (Or, if KickFlash ever gets released, you can hack away...)
27C400 - EPROM
29F400 - FLASH
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I would like to get some own written Code to run, first starting out with for example a little bit of code to let the LED's flash or so, the nicest thing to get running would be to hack the NetBSD kernel in a ROM and boot that (just as a proof of concept kinda idea)
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JimS wrote:
There's a design for a flashrom board on Aminet. It's for the 500/2000 rather than the 3000/4000/1200. I suppose you could modify it..
where you talking about this one ? :
http://aminet.net/hard/hack/DC-KF500.readme
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CLS2086 wrote:
Hi, all kickstart after 1.3 need 512 kb (the A1200 use 2 x 256 kb to maintain 32 bits compability....).
Do you want to finish the yeah old and buggy kick 3.5 ?
Or want to rewrite the new kickstart v50 for A4000+CPPC for AOS 4 ?? ;-)
I dont have a certain nickname wich shortens to "DM" and has a Amiga2000HD with Mil-Spec'd Custom Chips.
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locutus wrote:
where you talking about this one ? :
http://aminet.net/hard/hack/DC-KF500.readme
Yes, that was the one I had in mind. I guess it would be kind of a pain to convert. You'd need to use 4 flash rams for 32 bit ram, and re-write the program to handle it..