INES Mapper 077: Difference between revisions
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(Created page with "Category:iNES Mappers Here are Disch's original notes: ======================== = Mapper 077 = ======================== Example Game: ----------…") |
(fix CHR memory ranges, which I'm guessing were originally meant to be separated by "/" rather than "-") |
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[[Category:iNES Mappers]] | {{DEFAULTSORT:077}}[[Category:iNES Mappers]][[Category:Discrete logic mappers]][[Category:in NesCartDB]][[Category:Mappers with CHR ROM and CHR RAM]] | ||
======================== | ======================== | ||
= Mapper 077 = | = Mapper 077 = | ||
======================== | ======================== | ||
Example Game: | Example Game: | ||
Line 13: | Line 11: | ||
Notes: | Notes: | ||
--------------------------- | --------------------------- | ||
This mapper | This mapper uses an 8 KiB SRAM to provide both 6 KiB of CHR-RAM and | ||
four-screen mirroring. | |||
Registers: | Registers: (** BUS CONFLICTS **) | ||
--------------------------- | --------------------------- | ||
Line 30: | Line 24: | ||
CHR Setup: | CHR Setup: | ||
--------------------------- | --------------------------- | ||
CHR-RAM is fixed at $0800-$1FFF. CHR-ROM is swappable at $0000: | |||
$0000-$07FF $0800-$0FFF $1000-$17FF $1800-$1FFF $2000-$27FF $2800-$2FFF | |||
+-----------+-----------+-----------+-----------+-----------+-------------+ | |||
| $8000,ROM | {1},RAM | {2},RAM | {3},RAM | {0},RAM |Internal VRAM| | |||
+-----------+-----------+-----------+-----------+-----------+-------------+ | |||
When making an emulator, you do not need to care about the specific order of | |||
the CHR-RAM banks: just provide 10KiB from $0800-$2FFF. | |||
Latest revision as of 19:53, 28 June 2022
======================== = Mapper 077 = ======================== Example Game: -------------------------- Napoleon Senki Notes: --------------------------- This mapper uses an 8 KiB SRAM to provide both 6 KiB of CHR-RAM and four-screen mirroring. Registers: (** BUS CONFLICTS **) --------------------------- $8000-FFFF: [CCCC PPPP] C = CHR Reg (2k @ $0000) P = PRG Reg (32k @ $8000) CHR Setup: --------------------------- CHR-RAM is fixed at $0800-$1FFF. CHR-ROM is swappable at $0000: $0000-$07FF $0800-$0FFF $1000-$17FF $1800-$1FFF $2000-$27FF $2800-$2FFF +-----------+-----------+-----------+-----------+-----------+-------------+ | $8000,ROM | {1},RAM | {2},RAM | {3},RAM | {0},RAM |Internal VRAM| +-----------+-----------+-----------+-----------+-----------+-------------+ When making an emulator, you do not need to care about the specific order of the CHR-RAM banks: just provide 10KiB from $0800-$2FFF.