Rolling Thunder                                      Dumped by arcade@zws.com
=============================================================================
This ROM set is taken from a Namco Rolling Thunder boardset.

You can view more information on my boards at http://www.zws.com/arcade/.

For vintage 1987, this is an EXTREMELY advanced game. Surface-mount chips,
lots of custom devices too. Annoyingly, most of the chips on the mainboard
are numbered with custom Namco part numbers, not their real identities. The
ROMs may be encrypted too 8-( There are several devices which I can't read;
they aren't EPROMs, I think they're large PALs or custom chips.

Audio output is provided by one YM2151. There is also a large high-density
DIP Hitachi HD63701XOP on a daughtercard, about 68 pins, which could be
another CPU. The daughtercard is definitely implicated in the digitized
audio output.

If you have hardware questions about this board for repair or emulation,
contact arcade@zws.com. I do not have schematics but will provide whatever
other assistance I can.


Daughterboard: Carries a large Hitachi HD63701XOP chip with a label on it
reading "NAMCO 61028 00104", some logic ICs, and a 40-pin DIP device custom-
labeled "115", date 8636.

File       Size  Loc       Purpose
======================================
RT1-17.ROM 27512 F1        ? }
RT1-18.ROM 27512 H1        ? } apparently wired direct to mainboard
RT3-19.ROM 27512 K1        ? } connector
RT3-20.ROM 27512 M1        ? }
RT1-21.ROM 27512 F3        ? ] apparently used by HD63701 chip
RT2-22.ROM 27512 H3        ? ]

Mainboard:

File       Size  Loc       Purpose
======================================
RT3-1B.ROM 27256 C9        Main CPU #1 [or audio CPU?] code (68A09EP)
RT3-2B.ROM 27256 C12       Main CPU #2 code 1 (68A09EP)
RT3-3.ROM  27256 D12       Main CPU #2 code 2 (68A09EP)
RT3-4.ROM  27256 B6        Digitized audio? Immediately next to two 40-
                           pin DIPs "60A1" (YM2203?) and "130" (6809?)
                           Machine won't start at all without this ROM
RT1-5.ROM  27256 R4        ? } used by large custom "43" chip at N6
RT1-6.ROM  27128 S4        ? } Removing 1-6 = no playfield layer, probably map
RT1-7.ROM  27512 R7        ? ] used by large custom "43" chip at N8
RT1-8.ROM  27256 S7        ? ] Removing 1-8 = no background layer, probably map
RT1-9.ROM  27512 H12       Graphics
RT1-10.ROM 27512 K12       Graphics
RT1-11.ROM 27512 L12       Graphics
RT1-12.ROM 27512 M12       Graphics
RT1-13.ROM 27512 P12       Graphics
RT1-14.ROM 27512 R12       Graphics
RT1-15.ROM 27512 T12       Graphics
RT1-16.ROM 27512 U12       Graphics