User talk:Hamtaro126

H126-ROM1 and H126-RAM1 mapper format (for next letter of ZZO38's Mapperset)

This mapper will be a DIY thing, I will not make carts, But it is possible to make them!

Based off a combo of UxROM and MMC3

PPU (H126-ROM1):

• $0000-$03FF: 4k CHR bank 1 (uses $40C0)
• $0400-$07FF: 4k CHR bank 2 (uses $40C1)
• $0800-$0BFF: 4k CHR bank 3 (uses $40C2)
• $0C00-$0FFF: 4k CHR bank 4 (uses $40C3)
• $1000-$13FF: 4k CHR bank 5 (uses $40C4)
• $1400-$17FF: 4k CHR bank 6 (uses $40C5)
• $1800-$1BFF: 4k CHR bank 7 (uses $40C6)
• $1C00-$1FFF: 4k CHR bank 8 (uses $40C7)

PPU (H126-RAM1):

• $0000-$1FFF - 8k CHR RAM ($40C0-$40C7 are unused!)

RAM:

• $5000-$5FFF: 2k WRAM (optional)
• $6000-$7FFF: 8k SaveRAM or WRAM

ROM:

• $8000-$9FFF: 8k ROM bank 1 (uses $40C8)
• $A000-$BFFF: 8k ROM bank 2 (uses $40C9)
• $C000-$DFFF: 8k ROM bank 3 (uses $40CA)
• $E000-$FFFF: 8k ROM bank 4 (Fixed)

PPU Mirror:

• $40CB: Mirroring (0 = 1-Screen $2000, 1 = 1-Screen $2400, 2 = Horizontal, 3 = Vertical)

IRQ (optional):

• $40CC: Control Disable
• $40CD: Control Enable
• $40CE: Cycle IRQ Counter Value (MMC5 style)

This is a WIP, May Change!!! --Hamtaro126 (talk) 08:10, 29 June 2013 (MDT)

Discussion

I suggest to use $40C8, $40C9, $40CA for the PRG ROM bank select, and having $40CB unused. I think this would be more logical and probably simpler to build. --Zzo38 (talk) 12:10, 29 June 2013 (MDT)

This is very similar to Taito's X1-017 or TC0350. —Lidnariq (talk) 13:12, 29 June 2013 (MDT)

EDIT1: Adjustments are Made, Tell me more, --Hamtaro126 (talk) 23:59, 29 June 2013 (MDT)

NOTE1: I actually based the format off of complex mappers like Sunsoft and Taito's, But wanted the user to choose what options needed for thier game, But this mapper is not too complex, It is designed for a variable sized package for cheapness, And the reason that MMC5-style instead of MMC3 IRQs are used because of ease of use! --Hamtaro126 (talk) 08:32, 30 June 2013 (MDT)