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Cart name
Notes for chip search:
  • Use "+" as delimeter for all fields (except "cart name", where space is used); if many values are entered, all of them must appear in the cartridge then; case is not sensitive
  • "Mapper" is the actual mapper used by this cartridge hardware (might not match the one at wiki.nesdev.com, as at the moment I was analyzing this cartridge, there was no mapper assigned to it, so I had to assign my own number for testing)
  • "Original mapper" is the mapper used by licensed version of this game (for multicarts, it refers to mapper of the inside games, so 0+2 means this cartridge can run NROM+UNROM games)
  • Order in which you put values doesn't matter (you can write 7400+74138+7400 or 7400+7400+74138 to search for a cartridge that contains at least two 7400 chips and one 74138
  • Some chips (like PAL16*8) appear in cartridges as 16V8 or 16L8, so be sure to check both posibilities
  • Same goes for memories - type 27F080 to search for 32 pin memories, 27512 for 28 pin with two chip enables or MASKROM_1M_DIP28 for 28 pin with one chip enable
  • Same goes for mappers - some examples: AX5904(MMC1), AX5202P(MMC3), PT8154BM (9112MMC3), AX5208C(VRC4), 23C3662(VRC2)
  • Good news is that you can use wildcards, so 74139+*MMC3* will search for any cartrige that has at least one 74139 and MMC3 chip in any version
Mapper#
Original mapper#
PCB marks
Tags
Chips
Nekketsu Monogatari
Typesingle
Mapper?
Original mapper4
PCB marksNONE
Tags:
Uploaded:2023-05-09 11:31:49

Elements:
NameValue
IC127512
IC1074670
IC1174157
IC1274161
IC1374670
IC1474670
IC157400
IC167400
IC227512
IC374138
IC47474
IC574161
IC674161
IC774670
IC874161
IC974670
CART1FAMICOM_CART

Chip signature:
27512+74670+74157+74161+74670+74670+7400+7400+27512+74138+7474+74161+74161+74670+74161+74670

PCB top:

PCB bottom:

Shell top:


Shell bottom:
No photo
Screenshoots:
No photo
Extra info:
https://forums.nesdev.com/viewtopic.php?f=9&t=13622
Downtown - Nekketsu Monogatari with TTLs!

------------------------------------------------------------------------------------------------
CPU:
$8000-$9fff | $a000-$bfff | $c000-$dfff | $e000-$ffff
   $8000         $8002         $8001          -1
------------------------------------------------------------------------------------------------
PPU:
$0000-$03ff|$0400-$07ff|$0800-$0bff|$0c00-$0fff|$1000-$13ff|$1400-$17ff|$1800-$1bff|$1c00-$1fff|
   $8010       $8011       $8012       $8013       $8020       $8021       $8022       $8023
------------------------------------------------------------------------------------------------
REGISTERS:

[.... PPPP] $8000/$8001/$8002 (mask $8073): Set PRG bank
      ||||
      ++++- PRG bank to set

[.CCC CCCC] $8010/$8011/$8012/$8013/$8020/$8021/$8022/$8023 (mask $8073): Set CHR bank
  ||| ||||
  +++-++++- CHR bank to set
  
[.... ...E] $8020 (mask: $8070): Counter enable/disable
         |
         +- 0: disable, 1:enable

[VVVV VVVV] $8030 (mask: $8070): Set counter value
 |||| ||||
 ++++-++++- set low byte of counter to the following value
 
[VVVV VVVV] $8040 (mask: $8070): Set counter value
 |||| ||||
 ++++-++++- set high byte of counter to the following value
------------------------------------------------------------------------------------------------
Counter operation:
There is 16 bit counter, which counts up and is clocked on every falling edge of M2 (it can be enabled/disabled via $8020)
If it rolls from $ffff to $0000, IRQ is asserted (counter counts from $0000 to $ffff again)
IRQ will be acked automatically after 16 CPU cycles (if counter is still running) or when writing to $8030.

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