making own ROM's

[pyrre]

Hello.
I put this topic here since it regards making roms...

I have searched for the topic the last few days. but i cant find any real related topic. (perhaps i suck at searching....)
anyways...

I recently purchased os 3.1.4 and try to install it to my A500+ but it gives me quite a challenge. The derringer has a hardware option to store rom in fastram.
Using the - D3 drom - option makes the hardware copy rom data to ram. but i find no option to spesify rom from a file. making it (so far) impossible to put 3.1.4 rom in use on my A500+ setup. I need an actual rom replacement.

If i am correct this should be able to program a 40 pin rom chip.

But i struggle finding the actual rom chips...
This chip has come recomended in many of the threads. But it is 42 pin....

Can anyone here put me in the right direction please?
(to a proper programmer and proper chips)

EDIT: Derringer 030 manual

[pyrre]

Yea... no problem on the A1200 with blizzkick.....
Should work just fine. have not had time to come around and tinker with the 1200 yet.

the A500 is set up and in use quite often. and i would like to upgrade it properly

[pyrre]

Do i need any special programmer, or will the linked one work?

[pyrre]

the programmer you linked to can only write to chips with 32 pins... A500 rom chips are 40 pins

[pyrre]

I dont think they would be happy about it....

but why not contact them and ask... maybe offer them a fee or aquire a lisence from them to do just that......