Well that means, that you can burn your own kickstart.
for Kickstart 1.3 (256 KByte - 2048 Kbit) you need 4x 8bit 27c512 eproms. 4x512 Kbit = 2048 Kbit
for Kickstart 3.1 (512 KByte = 4096 Kbit) you need 4x 8bit 27c1024 eproms. 4x1024 Kbit = 4096 Kbit
The same for the 40pin Epromsocket, but don't use a Original-Kickstatrom on this socket as the pin numberis the same, BUT the meaning of the pins is different.
a kickrom 1.3 256 KByte would fit into a 27c220 eprom (2048 Kbit - 2Mbit)
a kickrom 3.1 512KByte woukld fit into a 27c240 eprom (4096 Kbit = 4 Mbit)
Remember 1 Byte is 8 bit
Kickstart 3.5 doesn't exist. Its a badly dangerous hack of a beta 3.1 Kickrom
as always: Without warranty and sorry for bad English
Markus (I also own a Phoenixboard. SCSI sucks, but the rest is wonderfull A1000 with 2MB Chipmem :-D )