1mb rom maprom possible ?

[countzero]

I managed to burn a 1mb rom for my A1200 with piru's exec 44 and boing ball updates thanks to these wonderful threads and software by doobrey.

http://www.amiga.org/forums/showthread.php?t=25665
http://www.amiga.org/forums/showthread.php?t=22929

Now my question is, when I enable the maprom feature on my 1230MKIV, system cannot find the extended rom, since probably only the first 512k is mapped.

can it be possible to map full 1mb to fast ram ?

[countzero]

no I don't blizkick them I made the 1mb roms and burnt them on to chips. Doobrey has provided a 1mb patch which for all execs, now you don't have to use the cd32 exec. My roms work fine and everything seems ok. However, when I enable maprom feature on the blizzard (which copies the contents of the rom to fastram for quick access, this is completely done by the blizzard card) it only copies and maps the first 512K and rest is not found.

edit : I think I made a mistake opening the thread, I meant maprom instead of fastrom.

[countzero]

what are my chances of removing the 27c256 on the MKIV, reading the firmware, making necessary changes for 1mb maprom feature and burning it into a new rom ? (hmmm 0 ? 0.5% ?)