!prepare prom files for ether board local checkout

!assemble z80 program (generated in loader format already)
assem:z80 check

!assemble 68000 program (generated in binary for easy splitting)
!ass check
ass-lis check
!split it in two for the two proms
eprom:binsplit check.mob
delete check.mob!
!turn them from binary into loader format
frombin $m
frombin $l
rename $m/check.msb
rename $l/check.lsb