NINA-003-006
| Company | American Video Entertainment |
| Boards | NINA-03, NINA-06 |
| PRG ROM capacity | 64K |
| PRG ROM window | 32K |
| PRG RAM capacity | None |
| CHR capacity | 64K |
| CHR window | 8k |
| Nametable mirroring | Fixed H or V, controlled by solder pads |
| Bus conflicts | No |
| IRQ | No |
| Audio | No |
| iNES mappers | 079 |
| iNES 079 |
iNES Mapper 079 denotes the 72-pin NINA-03 and NINA-06 circuit boards, produced by American Video Entertainment. They only differ in the nature of the CIC — the former always has a microcontroller, the latter may instead have a charge pump. The iNES format designates mapper 79 to NINA-03 and NINA-06.
iNES Mapper 146 denotes the 60-pin Sachen 3015 and SA-016 (chip-on-board) circuit boards, which are functionally identical.
Banks
- CPU $8000-$FFFF: 32 KB switchable PRG ROM bank
- PPU $0000-$1FFF: 8 KB switchable CHR ROM bank
Registers
Control Register
This register is located at addresses:
F bit 0 ---- ---- ---- ---- 010x xxx1 xxxx xxxx
That is, $4100-$41FF, $4300-$43FF, $45xx, $47xx, ..., $5Dxx, and $5Fxx.
7 bit 0
---- ----
.... PCCC
||||
|+++-- Select 8 KB CHR ROM bank for PPU $0000-$1FFF
+----- Select 32 KB PRG ROM bank for CPU $8000-$FFFF
Variants
HES/AVE released three multicarts of NINA-06 games (HES 6-in-1, Mind Blower Pak, and Total Funpak (HES)), which is mapper 113. The multicart increases the bankable memory to 256 KiB PRG and 128 KiB CHR, and adds run-time selectable mirroring. iNES Mapper 148 has the same bit assignment in the data latch, but moves the latch register to the CPU $8000-$FFFF register, introducing bus conflicts.
Errata
For mapper 79 but not 146, FCEUX additionally implements a CNROM switch at CPU $8000-$FFFF, apparently to run a few mapper 3 games that are incorrectly set to mapper 79 in GoodNES 3.23b.
