NES 2.0 Mapper 394: Difference between revisions
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NewRisingSun (talk | contribs) (Created page with "{{DEFAULTSORT:394}}Category:Multicart mappersCategory:MMC3-like mappersCategory:Mappers with scanline IRQsCategory:Mappers with cycle IRQs '''NES 2.0 Mapper 39...") |
NewRisingSun (talk | contribs) (Correct higher address bits) |
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{{DEFAULTSORT:394}}[[Category:Multicart mappers]][[Category:MMC3-like mappers]][[Category:Mappers with scanline IRQs]][[Category:Mappers with cycle IRQs]] | {{DEFAULTSORT:394}}[[Category:Multicart mappers]][[Category:MMC3-like mappers]][[Category:Mappers with scanline IRQs]][[Category:Mappers with cycle IRQs]][[Category:Multi-ASIC mappers]] | ||
'''NES 2.0 Mapper 394''' denotes Realtec's '''HSK007''' multicart PCB. Unusually, it can be set to function either as an [[MMC3]] clone or as a [[J.Y. Company ASIC]]. | '''NES 2.0 Mapper 394''' denotes Realtec's '''HSK007''' multicart PCB. Unusually, it can be set to function either as an [[MMC3]] clone or as a [[J.Y. Company ASIC]]. | ||
| Line 7: | Line 7: | ||
D~7654 3210 | D~7654 3210 | ||
--------- | --------- | ||
...M | ...M MCBP | ||
| | | | |||+- PRG A18 | ||
| ||+-- PRG/CHR A19 | |||
| |+--- CHR A18 | |||
+-+---- Mapper Mode | +-+---- Mapper Mode | ||
0: BNROM | 0: BNROM | ||
| Line 32: | Line 34: | ||
1: From MMC3 (256 KiB inner bank) | 1: From MMC3 (256 KiB inner bank) | ||
Power-on value: $ | Power-on value: $90 | ||
In J.Y. Company ASIC Mode, PRG/CHR A17 always come from the J.Y. Company ASIC. | In J.Y. Company ASIC Mode, PRG/CHR A17 always come from the J.Y. Company ASIC. | ||
Latest revision as of 23:32, 28 October 2024
NES 2.0 Mapper 394 denotes Realtec's HSK007 multicart PCB. Unusually, it can be set to function either as an MMC3 clone or as a J.Y. Company ASIC.
Mode Register ($5009, write)
Mask: unknown, but A3 must be set
D~7654 3210
---------
...M MCBP
| |||+- PRG A18
| ||+-- PRG/CHR A19
| |+--- CHR A18
+-+---- Mapper Mode
0: BNROM
1: MMC3
2: J.Y. Company ASIC
3: Same as 2
Power-on value: $0F
Outer Bank Register ($500B, write)
Mask: unknown, but A3 must be set
D~7654 3210
---------
cC.p PBB.
|| | |++-- PRG A16..A15 in BNROM mode
|| | +---- PRG A17 if p=0
|| +------ PRG A17 in MMC3 mode
|| 0: From Outer Bank Register (128 KiB inner bank)
|| 1: From MMC3 (256 KiB inner bank)
|+-------- CHR A17 if c=0
+--------- CHR A17 in MMC3 mode
0: From Outer Bank Register (128 KiB inner bank)
1: From MMC3 (256 KiB inner bank)
Power-on value: $90
In J.Y. Company ASIC Mode, PRG/CHR A17 always come from the J.Y. Company ASIC.
