INES Mapper 086: Difference between revisions
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[[Category:iNES Mappers|086]][[Category:GNROM-like mappers|086]][[Category:in NesCartDB|086]][[Category:Expansion audio]] | |||
'''iNES Mapper 086''' designates Jaleco's JF-13 board used for ''Moero!! Pro Yakyuu'', the Japanese version of Jaleco's ''Bases Loaded''. | '''iNES Mapper 086''' designates Jaleco's JF-13 board used for ''Moero!! Pro Yakyuu'', the Japanese version of Jaleco's ''Bases Loaded''. | ||
== Hardware == | == Hardware == | ||
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*D7756 [http://www.cpu-world.com/Support/7/77.html description] and [http://bootgod.dyndns.org:7777/downloads/UPD7755_UPD7756_UPD7757_UPD7758.pdf datasheet] | *D7756 [http://www.cpu-world.com/Support/7/77.html description] and [http://bootgod.dyndns.org:7777/downloads/UPD7755_UPD7756_UPD7757_UPD7758.pdf datasheet] | ||
*BBS topics [http://forums.nesdev.org/viewtopic.php?t=762 762] and [http://forums.nesdev.org/viewtopic.php?p=32572#p32572 4030] | *BBS topics [http://forums.nesdev.org/viewtopic.php?t=762 762] and [http://forums.nesdev.org/viewtopic.php?p=32572#p32572 4030] | ||
Here are Disch's original notes: | Here are Disch's original notes: | ||
Revision as of 01:04, 22 April 2015
iNES Mapper 086 designates Jaleco's JF-13 board used for Moero!! Pro Yakyuu, the Japanese version of Jaleco's Bases Loaded.
Hardware
This board has 128 KiB PRG ROM, 64 KiB CHR ROM, no PRG RAM (the mapper ports are mapped in $6000-$7FFF instead, but that means no bus conflicts either), a 74HC139, two 74HC174s, and an additional ASIC "D7756C 148" by NEC that plays recorded speech compressed with ADPCM. An additional set of sample files is needed to emulate the sound chip.
Registers
PRG and CHR bank ($6000-$6FFF)
The PRG and CHR banking for this mapper is similar to GNROM or Color Dreams.
7654 3210 ||| || |++------ Select 32 KiB PRG bank at $8000 +-----++- Select 8 KiB CHR bank at $0000
Audio control ($7000-$7FFF)
7654 3210 || |||| || ++++- Track number |+------ While 0 and no sound is currently playing, start (or restart) sound specified in lower 4 bits +------- If 0 for at least 19µs=34cycles, the µPD7756C is reset and sound playback stops
Track numbers used in the game:
| 0 | Strike |
| 1 | Ball |
| 2 | Time |
| 3 | Out |
| 4 | Safe |
| 5 | Foul ball |
| 6 | Fair ball |
| 7 | Batter out |
| 8 | Play ball |
| 9 | Ball four |
| 10 | Home run |
| 11 | New pitcher |
| 12 | Ouch (hit by pitch) |
| 13 | Fool |
| 14 | blow sound? |
| 15 | shout of joy? |
References
- D7756 description and datasheet
- BBS topics 762 and 4030
Here are Disch's original notes:
========================
= Mapper 086 =
========================
Example Games:
--------------------------
Moero!! Pro Yakyuu (Black)
Moero!! Pro Yakyuu (Red)
Notes:
---------------------------
Regs are at $6000-7FFF, so these games have no SRAM.
Registers:
--------------------------
$6000-6FFF: [.CPP ..CC]
P = Selects 32k PRG @ $8000
C = Selects 8k CHR @ $0000
$7000-7FFF: [..SS IIII] Sound control **not sure about this**
S = Sound Start/Stop:
%10 = start sound effect?
anything else = stop sound effect?
I = Sound effect ID
Sound:
--------------------------
This mapper has some sort of sample playback mechanism. Writing to $7xxx starts/stops the currently playing
sample. How this playback works (apart from the sketchy notes above) is a complete mystery to me.
The sound effects themselves are NOT PART of the .nes file. Therefore the only real way to support them
currently would be to load external .wav files or something and play them back when they're triggered.
