INES Mapper 086: Difference between revisions
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(described here, citing Disch) |
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++------ Start/stop control | ++------ Start/stop control | ||
</pre> | </pre> | ||
[http://www.romhacking.net/docs/362/ Disch | Disch thinks it's 2=start, other=stop. | ||
== References == | |||
*[http://www.romhacking.net/docs/362/ Disch's mapper docs] | |||
*[http://bootgod.dyndns.org:7777/downloads/UPD7755_UPD7756_UPD7757_UPD7758.pdf D7756 datasheet | |||
*[http://nesdev.parodius.com/bbs/viewtopic.php?p=32572#32572 BBS discussion] | |||
[[Category:iNES Mappers]][[Category:Discrete logic mappers]] | [[Category:iNES Mappers]][[Category:Discrete logic mappers]] | ||
Revision as of 23:40, 26 January 2011
iNES Mapper 086 designates the JALECO-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 ++------ Start/stop control
Disch thinks it's 2=start, other=stop.
