Shell bottom: No photoScreenshoots: No photoExtra info:
vrc registers:
$8000/$8004/$8008/$800c (mask: 1111100000001100 = $F80C)
A~[1...1........ceee]
||||
|||+- data to EEPROM
||+-- clock to EEPROM
|+--- chip select to EEROM
+---- CHR-ROM enable (0) or disable (1);
data from EEPROM can be read as D0 in any CPU region that has
nothing mapped ($4020-$7fff)
CPU | $8000 | $c000 |
+-----------------------+-----------------------+
|$a000/$a004/$a008/$a00c| -1 |
PRG swap mode register ($9008) has no effect
PRG REGS = [....PPPP]
LOW CHR REGS = [....CCCC]
HIGH CHR REGS = [....CCCC]
PPU |$0000|$0400|$0800|$0c00|$1000|$1400|$$800|$1c00|
+-----+-----+-----+-----+-----+-----+-----+-----+
LOW |$b000|$b008|$c000|$c008|$d000|$d008|$e000|$e008|
| + | + | + | + | + | + | + | + |
HIGH |$b004|$b00c|$c004|$c00c|$d004|$c00c|$e004|$e00c|
--
I've found another Dragon Ball Z cartridge. Mapper is identical as above, but instead of PRG-ROM/CHR-ROM/Mapper chips, there are blobs. And place to solder 6264 CHR-RAM. And one additional feature:
[code]
A~[1...1........ceee]
|
|
|
|
+---- CHR-ROM enable (0) or disable (1);
[/code]
CHR-RAM, when soldered, is always enabled at $0000, so no idea what is purpose of that bit.
Anyway, PRG-ROM chip read backs as garbage, but CHR-ROM is ok. Comparing with:
Dragon Ball Z Gaiden - Saiya Jin Zetsumetsu Keikaku (J)
gives 100% match, so this is the same game as above.
[url=https://obrazki.elektroda.pl/9248731700_1570390691.jpg][img]https://obrazki.elektroda.pl/9248731700_1570390691_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/4200446100_1570390694.jpg][img]https://obrazki.elektroda.pl/4200446100_1570390694_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/1112113800_1570390706.png][img]https://obrazki.elektroda.pl/1112113800_1570390706_thumb.jpg[/img][/url]