NES 2.0 Mapper 305
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NES 2.0 Mapper 305 is used for Kaiser's ROM cartridge conversion of the Japanese Famicom Disk System version of ドラキュラII 呪いの封印 (Dracula II: Noroi no Fūin). Its UNIF board name is KS7031 (without any prefix).
Banks
- CPU $6000-$67FF: 2 KiB switchable PRG-ROM bank
- CPU $6800-$6FFF: 2 KiB switchable PRG-ROM bank
- CPU $7000-$77FF: 2 KiB switchable PRG-ROM bank
- CPU $7800-$7FFF: 2 KiB switchable PRG-ROM bank
- CPU $8000-$87FF: 2 KiB fixed PRG-ROM bank #15
- CPU $8800-$8FFF: 2 KiB fixed PRG-ROM bank #14
- CPU $9000-$97FF: 2 KiB fixed PRG-ROM bank #13
- CPU $9800-$9FFF: 2 KiB fixed PRG-ROM bank #12
- CPU $A000-$A7FF: 2 KiB fixed PRG-ROM bank #11
- CPU $A800-$AFFF: 2 KiB fixed PRG-ROM bank #10
- CPU $B000-$B7FF: 2 KiB fixed PRG-ROM bank #9
- CPU $B800-$BFFF: 2 KiB fixed PRG-ROM bank #8
- CPU $C000-$C7FF: 2 KiB fixed PRG-ROM bank #7
- CPU $C800-$CFFF: 2 KiB fixed PRG-ROM bank #6
- CPU $D000-$D7FF: 2 KiB fixed PRG-ROM bank #5
- CPU $D800-$DFFF: 2 KiB fixed PRG-ROM bank #4
- CPU $E000-$E7FF: 2 KiB fixed PRG-ROM bank #3
- CPU $E800-$EFFF: 2 KiB fixed PRG-ROM bank #2
- CPU $F000-$F7FF: 2 KiB fixed PRG-ROM bank #1
- CPU $F800-$FFFF: 2 KiB fixed PRG-ROM bank #0
- PPU $0000-$1FFF: 8 KiB unbanked CHR-RAM
Registers
PRG-ROM Bank ($8000-$FFFF)
Mask: $8000
A~FEDC BA98 7654 3210
-------------------
1..R R... .... ....
+ +-------------- Select register number
$8000: Set 2 KiB PRG-ROM bank at CPU $6000-$67FF
$8800: Set 2 KiB PRG-ROM bank at CPU $6800-$6FFF
$9000: Set 2 KiB PRG-ROM bank at CPU $7000-$77FF
$9800: Set 2 KiB PRG-ROM bank at CPU $7800-$7FFF
Notes
- Mirroring is hard-wired to Vertical. One of the two common UNIF ROM images of this game has no MIRR chunk.
- Save data is not retained, even as one of the two common UNIF ROM images has a BATT chunk.
- The conversion retains all writes to the FDS sound channel registers, so an emulator could provide the expansion sound channel even though the original Kaiser cartridge did not.
