PRG: 512 KiB ROM
CHR: 8 kB RAM
Bus conflicts: no
gG | GAME
---+----------------
00 | Trog
10 | Duck Tales I
01 | Marble Madness
11 | Captain Skyhawk
Registers:
$6000-$7FFF: UNROM/ANROM banking type & game number
7 bit 0
---- ----
TgGP
||||
|||+------------ protection: 0 - off, 1 - contents of this register cannot be changed until console reset
|++------------- selects one of four 128 kB games; g is lower address line: PRG-A18 = G, PRG-A17=g
+--------------- banking style: 0 - UNROM: $8000-$bfff 16 kB switchable CBA bank, $c000-$ffff fixed to last bank, PPU vertical mirroring
1 - ANROM: $8000-$ffff 32 kB switchable BA bank, PPU single screen mirroring
$8000-$FFFF: bank select (when in UNROM mode)
7 bit 0
---- ----
CBA
|||
+++------------ UNROM bank (when in UNROM MODE)
$8000-$FFFF: bank select (when in ANROM mode)
7 bit 0
---- ----
M BA
| ||
| ++------------ ANROM bank (when in ANROM MODE)
+----------------- one screen mirroring