Cart DB #197: Super Mario Bros 2 (J)

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

Name	Value
IC1	27512
IC2	6264
IC3	74138
IC4	74161
IC5	7400
IC6	7432
IC7	7400
IC8	74157
IC9	4020
CART1	FAMICOM_CART

Name

Value

IC1

IC2

IC3

IC4

IC5

IC6

IC7

IC8

IC9

CART1

FAMICOM_CART

SMBJ2 ([mapper 40) a'ka 1990 Super Bros.4 - rev en Finally got this rare SMB2J based on discrete chips (no PAL). It turned out to be [url=http://wiki.nesdev.com/w/index.php/INES_Mapper_040]mapper 40[/url]. I was wondering how did they wire all these chips to achieve that weird fixed banks. ([url=https://forums.nesdev.com/viewtopic.php?f=28&t=17108]I was able to do it using 2 chips less back in the days[/url]). Funny how they used 2 NAND gates to make latch for IRQ assert/deassertion. And how the PRG/CHR address lines are shuffled. PRG is identical to `Super Mario Bros. 4 (FDS Conversion)(Unl)[!]`, CHR differs in few bytes. And the difference is because of.. mario's outline: [img]https://obrazki.elektroda.pl/2818807300_1580943774.png[/img] [code] $8000-$9fff: [........] - write acknowledges IRQs, clears and stop counter $a000-$bfff: [........] - write starts counter (clocked by CPU cycles). After 4096 cycles (~36 scanlines) IRQ is generated $e000-$ffff: [.....PPP] - set prg bank $6000 $8000 $a000 $c000 $e000 %110 %100 %101 PPP %111 Bus conflicts: no [/code] [url=https://obrazki.elektroda.pl/3332972300_1580943483_org.jpg][img]https://obrazki.elektroda.pl/3332972300_1580943483_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/6815700400_1580978383_org.jpg][img]https://obrazki.elektroda.pl/6815700400_1580978383_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/9444002200_1580943484_org.jpg][img]https://obrazki.elektroda.pl/9444002200_1580943484_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/6297947500_1580943485.png][img]https://obrazki.elektroda.pl/6297947500_1580943485_thumb.jpg[/img][/url]

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 PAL168) 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