A600 does not like 1MB ROM.

[reinauer]

This will boot loop on an A600 (using 27c800):

$ romtool patch -o kick.rom CDTVA500A600A2000.47.111.rom 1mb_rom
$ romtool build -o ext.rom -t ext -s 512  -f -r 47.111 icon.library workbench.library hrtmodule
$ romtool combine kick.rom ext.rom -o kick1mb.rom
$ srec_cat kick1mb.rom -binary -byteswap 2 -o kick1mb.bin -binary