NES 2.0 Mapper 312: Difference between revisions
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(add link to pcb picture? maybe not original pcb) |
(→See also: actual link to PCB photos) |
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1: Horizontal | 1: Horizontal | ||
==See also== | ==See also== | ||
* [//forums.nesdev.org/viewtopic.php? | * [//forums.nesdev.org/viewtopic.php?p=256930#p256930 PCB photos] | ||
* [//forums.nesdev.org/viewtopic.php?p=256961#p256961 Krzysiobal's reverse engineering from above photos] | |||
Latest revision as of 19:35, 28 September 2020
NES 2.0 Mapper 312 is used for Kaiser's bootleg version of Highway Star. Its UNIF board name is UNL-KS7013B.
Banks
- CPU $8000-$BFFF: Switchable 16 KiB PRG-ROM bank
- CPU $C000-$FFFF: Fixed 16 KiB PRG-ROM bank #7
- PPU $0000-$1FFF: Unbanked 8 KiB of CHR-RAM
Registers
PRG-ROM Select ($6000-$7FFF)
Mask: $E000
D~7654 3210
---------
.... .PPP
+++- Select 16 KiB PRG-ROM bank at CPU $8000-$BFFF
Nametable Mirroring Type Select ($8000-$FFFF)
Mask: $8000
D~7654 3210
---------
.... ...M
+- Select nametable mirroring type
0: Vertical
1: Horizontal
