0200..0207: 01 01 01 03 01 01 01 02 ;\translates bank 03h to 3 (menu), bank
0208..02FF: filled with 01 ;/07h to 2 (amsdos), others to 1 (basic)
Address FABFh: Ext Port
0700..07FF: filled with incrementing values: 00h..FFh
== Aleste MAPPER prom (Gate Array 3, RAM banking) ==