INES Mapper 132: Difference between revisions
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INES Mapper 132 is used to denote the TXC 01-22270-000 and 01-22111-100 boards, used by a few games from TXC Corporation: | INES Mapper 132 is used to denote the TXC 01-22270-000 and 01-22111-100 boards, used by a few games from TXC Corporation: | ||
{| class="tabular" | |||
! Title !! Cartridge code !! PRG-ROM !! CHR-ROM !! Notes | |||
|- | |||
| 棋王 (Qíwáng, Chinese Chess) || MGC-001 || 64 KiB || 32 KiB || | |||
|- | |||
| Creatom || MGC-003 || 64 KiB || 32 KiB || | |||
|- | |||
| 小瑪琍 (Xiǎo Mǎlí) || MGC-005 || 16 KiB || 8 KiB || TXC re-release, no bankswitching or copy-protection | |||
|- | |||
| 麻将方块 (Mahjong Block) || MGC-008 || 32 KiB || 32 KiB || TXC re-release | |||
|- | |||
| Venice Beach Volley || MGC-010 || 32 KiB || 32 KiB || TXC re-release | |||
|- | |||
| Rad Racket - Deluxe Tennis II || MGC-011 || 32 KiB || 32 KiB || TXC re-release | |||
|} | |||
Its UNIF board name is '''UNL-22211'''. | Its UNIF board name is '''UNL-22211'''. | ||
| Line 34: | Line 43: | ||
==Notes== | ==Notes== | ||
* ''戰國四川省'' (Zhànguó Sìchuān Shěng, original version of AVE's ''Tiles of Fate'') is set to Mapper 132 in GoodNES 3.23b. That ROM image is actually a mapper hack with the PRG-ROM code unmodified but the CHR-ROM banks rearranged to work as Mapper 132; the correct mapper is [[INES Mapper 173]]. That mapper hack only works on certain emulators' implementation of Mapper 132, not on the above implementation based on studying the circuit board. | * ''戰國四川省'' (Zhànguó Sìchuān Shěng, original version of AVE's ''Tiles of Fate'') is set to Mapper 132 in GoodNES 3.23b. That ROM image is actually a mapper hack with the PRG-ROM code unmodified but the CHR-ROM banks rearranged to work as Mapper 132; the correct mapper is [[INES Mapper 173]]. That mapper hack only works on certain emulators' implementation of Mapper 132, not on the above implementation based on studying the circuit board. | ||
* The TXC re-release of ''小瑪琍'' (Xiǎo Mǎlí), with cartridge code MGC-005, uses the 01-22111-100 board as well, but since it does not use any bankswitching whatsoever, it can be emulated as mapper 0. | |||
==Similar Mappers== | ==Similar Mappers== | ||
* On games with only 32 KiB PRG-ROM, Mapper 132 is almost identical to [[INES Mapper 136]] except in the value read from $4100 due to Mapper 136 having four (28-pin JV001 ASIC) versus Mapper 132 having three adder bits (24-pin 05-00002-010 ASIC). | * On games with only 32 KiB PRG-ROM, Mapper 132 is almost identical to [[INES Mapper 136]] except in the value read from $4100 due to Mapper 136 having four (28-pin JV001 ASIC) versus Mapper 132 having three adder bits (24-pin 05-00002-010 ASIC). | ||
* On games with only 32 KiB PRG-ROM, [[INES Mapper 173]] is similar to Mapper 132 except that CHR A14 is taken from the inverse of the Invert bit rather than Output bit 1. | * On games with only 32 KiB PRG-ROM, [[INES Mapper 173]] is similar to Mapper 132 except that CHR A14 is taken from the inverse of the Invert bit rather than Output bit 1. | ||
* [[INES Mapper 036]] is somewhat similar, using the same 05-00002-010 ASIC. It utilizes CPU bits 4 and 5 instead of 2 | * [[INES Mapper 036]] is somewhat similar, using the same 05-00002-010 ASIC. It utilizes CPU bits 4 and 5 instead of 2 for PRG-ROM banking and moves CHR-ROM banking to a separate data latch. | ||
==See also== | ==See also== | ||
[http://forums.nesdev.org/viewtopic.php?f=3&t=15961&p=213362#p213362 PCB images ] | [http://forums.nesdev.org/viewtopic.php?f=3&t=15961&p=213362#p213362 PCB images ] | ||
Revision as of 12:35, 9 February 2018
INES Mapper 132 is used to denote the TXC 01-22270-000 and 01-22111-100 boards, used by a few games from TXC Corporation:
| Title | Cartridge code | PRG-ROM | CHR-ROM | Notes |
|---|---|---|---|---|
| 棋王 (Qíwáng, Chinese Chess) | MGC-001 | 64 KiB | 32 KiB | |
| Creatom | MGC-003 | 64 KiB | 32 KiB | |
| 小瑪琍 (Xiǎo Mǎlí) | MGC-005 | 16 KiB | 8 KiB | TXC re-release, no bankswitching or copy-protection |
| 麻将方块 (Mahjong Block) | MGC-008 | 32 KiB | 32 KiB | TXC re-release |
| Venice Beach Volley | MGC-010 | 32 KiB | 32 KiB | TXC re-release |
| Rad Racket - Deluxe Tennis II | MGC-011 | 32 KiB | 32 KiB | TXC re-release |
Its UNIF board name is UNL-22211.
Banks
- CPU $8000-$FFFF: 32 KiB switchable PRG ROM bank
- PPU $0000-$1FFF: 8 KiB switchable CHR ROM bank
Registers
Mapper 132 uses a custom IC (real number 05-00002-010, often with fake markings) serving as a latch, adder and inverter. There are five registers: Input (4 bits), Output (4 bits), Register (4 bits), Mode (1 bit) and Invert (1 bit).
Mask: $E103
Read $4100-$4103: [.... RRRR]: Read Register. Bit 3 is inverted if Invert==1. Bits 4-7 are open bus.
Write $4100: When Mode==0: Bits 0-3 of Register := Input, bits 0-2 being inverted if Invert==1.
When Mode==1: Bits 0-2 of Register incremented by one, bit 3 unaffected.
Write $4101: Invert := Written value bit 0.
Write $4102: Input := Written value bits 0-3.
Write $4103: Mode := Written value bit 0.
Write $8000-$FFFF: Output := Register; written value is ignored.
In Mapper 132, Output is connected as follows:
3210 ---- .|++- Select 8 KiB CHR-ROM bank at PPU $0000-$1FFF (CHR A13/A14) +-- Select 32 KiB PRG-ROM bank at CPU $8000-$FFFF (PRG A15)
Games will also check the lower three or four bits of $4100 for the correct value after several increment and inversion operations as a copy-protection measure.
Notes
- 戰國四川省 (Zhànguó Sìchuān Shěng, original version of AVE's Tiles of Fate) is set to Mapper 132 in GoodNES 3.23b. That ROM image is actually a mapper hack with the PRG-ROM code unmodified but the CHR-ROM banks rearranged to work as Mapper 132; the correct mapper is INES Mapper 173. That mapper hack only works on certain emulators' implementation of Mapper 132, not on the above implementation based on studying the circuit board.
- The TXC re-release of 小瑪琍 (Xiǎo Mǎlí), with cartridge code MGC-005, uses the 01-22111-100 board as well, but since it does not use any bankswitching whatsoever, it can be emulated as mapper 0.
Similar Mappers
- On games with only 32 KiB PRG-ROM, Mapper 132 is almost identical to INES Mapper 136 except in the value read from $4100 due to Mapper 136 having four (28-pin JV001 ASIC) versus Mapper 132 having three adder bits (24-pin 05-00002-010 ASIC).
- On games with only 32 KiB PRG-ROM, INES Mapper 173 is similar to Mapper 132 except that CHR A14 is taken from the inverse of the Invert bit rather than Output bit 1.
- INES Mapper 036 is somewhat similar, using the same 05-00002-010 ASIC. It utilizes CPU bits 4 and 5 instead of 2 for PRG-ROM banking and moves CHR-ROM banking to a separate data latch.
