UNIF/FARID UNROM 8-IN-1

UNIF MAPR FARID_UNROM_8-IN-1 (note underscores) describes a multicart designed by Farid in 2013. It contains eight 128 KiB UNROM games.

It adds a shadowed "outer bank" register on top of the normal UNROM banking register:

Note: bus conflicts are present!

$8000-$FFFF: [KOOO .III]
              ||||  |||
              ||||  +++-- Normal UNROM bank register; now inner bank
              |+++------- Outer bank
              +---------- 0 then 1: Latch value written to outer bank and prevent any subsequent writes to outer bank

On both warm and cold boot, only the outer bank register is cleared.

See also:

• http://forums.nesdev.org/viewtopic.php?t=11099