MAMEWorld Forums - News - Re: the Ancient Taito additions *edit*

>couple of old Taito games. If you donate we can add you to the mame credits. The games are
>TT Defender (Japan) and TT New York New York (Japan). "TT" is the brand Taito used in the
>early 80's on games where they produced the hardware themselves. TT Defender runs on
>totally different hardware from the Defender you know, made by Taito. TT New York New York
>has Japanese text

Bravo. Good to know the Taito TT Defender (Japan) is now considered fully working.

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https://git.redump.net/mame/commit/?id=7026ee3fcb87af0b3aeaacb59960ae6d3613373e

2017-04-02

Documented that Taito's T.T. New York New York ROMs match the Sigma set

src/mame/drivers/nyny.cpp

// NE01.IC10.2716 on Taito PCB
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TT New York New York (Japan) was documented last month. I thought some clone sets were added even if all the roms matched, but used different rom names. There was one example, maybe NATO Defense iirc. The Taito TT Defender (Japan) name should still be added in the section of:

src/mame/mame.lst

@source:nyny.cpp
nyny // (c) 1980 Sigma Ent. Inc.

That way it is already known and accounted for so other newcomers don't mistake the Taito version of TT New York New York (Japan) has yet to be supported.

And it looks as if more work to be done with src/mame/drivers/nyny.cpp

Will ShouTime be able to help resolve a couple of these issues?

Known issues/to-do's:
* What does port A on IC37 AY8910 do? It looks like a DAC, but
this is not supported by the writes to the port. All the
writes are 0x9X, usually 0x9b or 0x9d. Note that this is
incorrectly referred to as port B on the schematics, but the
pin #'s confirm it is, in fact port A.
* What is the main CPU clock? 11.2Mhz / 16 goes through
a MC4044 and a MC4024 analog chips before going to the EXTAL
pin of the M6809

Edited by gregf (05/03/17 07:04 PM)