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PostPosted: Tue Jun 20, 2017 3:31 pm 
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Location: Poland
In case anyone would like to rev-en. Unfortunately those photos are not mine, I waited half of year for one man to take them for me.
Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image


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PostPosted: Tue Jun 20, 2017 3:45 pm 
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Joined: Mon Dec 12, 2011 8:15 pm
Posts: 296
this mapper 106,two version dumped rom.


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PostPosted: Tue Jun 20, 2017 4:07 pm 
Online

Joined: Sun Apr 13, 2008 11:12 am
Posts: 6175
Location: Seattle
Parts:
74LS161 74LS04 74LS670 74LS32
74LS161 74LS670 74LS670 23C1024
74LS74 74LS670 74LS374
74LS74 74LS32 74LS374
74LS138
74LS20 74LS157 GM76C88 23C1024 23C1024
4040 74LS86
74LS393 74LS00
74LS32 74LS74 74LS32 74LS08

Findings:
Presence of 4040 and 76C88 means this is not a N108 clone. There is some kind of IRQ source (the 4040) and PRG RAM (the 76C88)

Edit: Summarizing FCEUX's mapper 106 code:
Register mask: $800F.
Writes to $8000 through $8007: Set eight 1 KiB CHR banks. Bottom four banks deny use of LSbit, like MMC3, but allow upper 7 bits to be set differently.
Writes to $8008 through $800B: Set four 8 KiB PRG banks. Banks at $8000 (reg $8008) and $E000 (reg $800B) force $10s bit high.
Write to $800C: Identical to MMC3 $A000 mirroring control
Write to $800D: Acknowledge and disable IRQ
Write to $800E: Set upper byte of 16-bit terminal count
Write to $800F: Set lower byte of 16-bit terminal count, and enable counter. Counts M2 cycles.

I'm not entirely convinced the enumerated parts match the functional description. I don't think I see enough possible simple logic to compare every bit of the 4040's output against latches.


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PostPosted: Mon Jun 26, 2017 11:23 am 
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That is awesome AF


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PostPosted: Fri Sep 01, 2017 5:03 pm 
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Joined: Sun Jun 12, 2011 12:06 pm
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Location: Poland
I got the mapper 106 SMB3 version:
Image Image Image Image Image

Probably the one from first post is unmodified SMB3.


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PostPosted: Fri Sep 01, 2017 10:48 pm 
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Joined: Mon Dec 12, 2011 8:15 pm
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this mapper 106 or 56


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PostPosted: Sat Sep 02, 2017 3:47 am 
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Joined: Sun Jun 12, 2011 12:06 pm
Posts: 198
Location: Poland
zxbdragon wrote:
this mapper 106 or 56

Yes, this is mapper 106. This version works only in NTSC/Dendy mode.
What is mapper 56, as FCEUX does not have it implemented?


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PostPosted: Sat Sep 02, 2017 4:03 am 
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mapper 56 is KAISER_KS7022C or KAISER_KS202

ines or nes 2.0 is Chicken ribs!


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