TOS4.04 FAST ROM (not cheaper/slower eprom type) . Either a update or as a replacement for Atari Falcon 030 / C-LAB machines. These ROM's are verified working with zero waitstates on the Falcon which gives a small boost overall in machine speed.

NOTE: Other Falcon ROMs may have the same number as in the machine already, or sold elsewhere, but are likely not fast enough for zero wait states. The ROMs sold in my store are always fast ROMs and now marked as 4.04F to verify.