Another long standing bug fixed, this time with Joyful Road / Munch Mobile substained sounds.

Lord Nightmare did some studying of the schematics in there, and ended up with a bunch of unemulated ports that directly goes to the AY reset lines. Hooking that up makes the sound in this one to finally work.

Investigated with Phil Bennett and Charles MacDonald about why Bonanza Bros. never ever played samples from when it was marked as working. It turned out that Sega System 24 HW uses a FRC that also does a previously unemulated IRQ service.

Implemented ES5510 DSP DRAM latches to Taito F3 driver, this adds full sound to Riding Fight and gives correct sound to Ring Rage without going into test mode first.

Did a review of the Taito JC system driver in the last couple of days. It apparently got recently improved by some ‘040 fixes by Arbee, so I’ve given a quick look of it, fixed inputs in all games in the driver, fixed a crash for Densya de Go 2, made various gfx fixes (in particular I’ve added a Gouraud Shading triangle drawing mode, used by Landing Gear for some elements). This makes Densya de Go, Densya de Go 2 and Landing Gear to be working, and improves Dangerous Curves that now enters into gameplay but doesn’t show any 3d due of a DSP bug.

Out of curiosity, I’ve checked Magical Zunou Power on ST-V and its serial communication with the self-called sub board. Game talks with “something” via a serial port, and it does your usual serial checks (buffer Rx FULL, buffer Tx FULL, END flag, time out). Not knowing the protocol used this is quite annoying to HLE, so for now I’ve hacked the comms checks.

It ended up that the game is all about a quiz game based off a Japanese TV Quiz show, that uses a microphone in order to give answers, that obviously isn’t doable with current MAME I/O framework.