NINA-003-006: Difference between revisions
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+---------- Select mirroring (clear: horizontal, set: verical) | +---------- Select mirroring (clear: horizontal, set: verical) | ||
The mirroring bit should only be honored on the board type used by ''HES 6-in-1'', ''Mind Blower Pak'', and ''Total Funpak (HES)''. | The mirroring bit should only be honored on the board type used by ''HES 6-in-1'', ''Mind Blower Pak'', and ''Total Funpak (HES)'', which is iNES mapper 113. On iNES mapper 79, this bit is ignored. | ||
Revision as of 01:43, 5 November 2011
NINA-003 and NINA-006 (author is embarrassed not to know which is which) are unlicensed boards produced by American Video Entertainment.
Overview
- PRG ROM size: up to 256 KB
- PRG ROM bank size: 32 KB
- PRG RAM: None
- CHR ROM capacity: up to 128 KB
- CHR bank size: 8 KB
- Nametable mirroring: hardwired to vertical or horizontal mirroring, or controlled by mapper (depending on type)
- Subject to bus conflicts: No
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 ---- ---- MCPP PCCC |||| |||| |+||-|+++-- Select 8 KB CHR ROM bank for PPU $0000-$1FFF | ++-+----- Select 32 KB PRG ROM bank for CPU $8000-$FFFF +---------- Select mirroring (clear: horizontal, set: verical)
The mirroring bit should only be honored on the board type used by HES 6-in-1, Mind Blower Pak, and Total Funpak (HES), which is iNES mapper 113. On iNES mapper 79, this bit is ignored.
