FYI: Mortal Kombat 4 uses 2MB ROMs (except for u2)

[tinktinp]

Hi. I noticed that Mortal Kombat 4 uses 2MB rom chips for u3 through u5.

https://github.com/mamedev/mame/blob/master/src/mame/midway/midzeus.cpp#L1492-L1497

ROM_START( mk4 )
	ROM_REGION16_LE( 0x1000000, "dcs", ROMREGION_ERASEFF )  // sound data
	ROM_LOAD16_BYTE( "mk4_l2.u2", 0x000000, 0x100000, CRC(f9d410b4) SHA1(49bcacf83430ed26c08789b2f3ed9f946c3a0e5e) ) // Labeled as v2.0, ROM type M27C800
	ROM_LOAD16_BYTE( "mk4_l2.u3", 0x400000, 0x200000, CRC(8fbcf0ac) SHA1(c53704e72cfcba800c7af3a03267041f1e29a784) ) // Labeled as v2.0, ROM type M27C160
	ROM_LOAD16_BYTE( "mk4_l1.u4", 0x800000, 0x200000, CRC(dee91696) SHA1(00a182a36a414744cd014fcfc53c2e1a66ab5189) ) // Labeled as v1.0, ROM type M27C160
	ROM_LOAD16_BYTE( "mk4_l1.u5", 0xc00000, 0x200000, CRC(44d072be) SHA1(8a636c2801d799dfb84e69607ade76d2b49cf09f) ) // Labeled as v1.0, ROM type M27C160

http://mjrnet.org/pinscape/dcsref/DCS_format_reference.html says:

Physical ROM chip configuration

All of the program code and audio data for a DCS sound board is contained in a set of ROM chips. The circuit boards have slots for up to 8 ROMs, either 512KB or 1MB in size, depending upon the hardware version. The original DCS-93 audio-only boards use 512KB (512Kb x 8) chips, and the DCS-95 audio/video boards use 1MB (1Mb x 8) chips. The DCS-95 boards were designed in such a way that they could be configured at the factory, via a soldered jumper, to accept either 1MB or 2MB chips. All of the boards shipped originally in pinball machines apparently use the 1MB configuration. (Williams also used DCS boards in its video games of the same era, so it's possible that the 2MB configuration was used in some of those.)

(As an aside, it would be handy if I could link to individual sections. As an example, Github markdown does that so I can direct link into part of your readme.)