INES Mapper 077: Difference between revisions
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m (refile, add cat:nescartdb. Also RE'd for trivia and found which 2KiB of the 10 were the NES's internal VRAM.) |
(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 uses an 8 KiB SRAM to provide 6 KiB of CHR-RAM and | This mapper uses an 8 KiB SRAM to provide both 6 KiB of CHR-RAM and | ||
four-screen mirroring. | |||
Registers: (** BUS CONFLICTS **) | Registers: (** BUS CONFLICTS **) | ||
| Line 25: | 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.
