Kale's Mame Wip

Desastre Natural

Kale — Tue, 27 Mar 2012 23:53:33 +0000

Understood and hooked up sound HW in Little Robin, that is a weird combination of 2 DAC sound chips, the video scanline register, interrupt generation (irq lv 4 with an input port that defines the kind of irq, currently hooked up with the video frame number) and two lovely 16-bit port registers (one for each DAC) that alternates the resulting 8-bit sound index according to an external source (frame number % 16 with current implementation, as each “sound irq” happens every 8 frames). And by alternation it means in the sense of muxing between LSB or MSB of the aforementioned sound index (that is obviously pointless if isn’t a form of protection).

JFK to LAX

Kale — Fri, 03 Feb 2012 14:39:04 +0000

It’s no secret that the team is currently doing major efforts in emulating PC-AT based HW. Grull Osgo in particular is working on California Chase, that is currently more or less working with a “MS-DOS” kludge (you need to type boot after that Win 98 fails to boot). I’ve tweaked the code a little and added an idle skip for it.

Street Games 2 recently started working after some tweaks to the VGA code:

EDIT: added sound to Cali Chase -> http://mamedev.emulab.it/kale/wp-content/uploads/2012/02/cali3.mp3

Conformist Nonconformist

Kale — Wed, 07 Dec 2011 14:16:52 +0000

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.

Laughter Track

Kale — Wed, 09 Nov 2011 22:28:47 +0000

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.

Ippatsu Fight

Kale — Mon, 07 Nov 2011 18:56:32 +0000

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.

The Last Express

Kale — Wed, 24 Aug 2011 12:56:19 +0000

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.

Open Mic Poetry

Kale — Thu, 18 Aug 2011 23:41:33 +0000

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.

Business as Usual

Kale — Thu, 28 Jul 2011 23:39:04 +0000

More Sega Saturn WIP pics, based off the latest fixes for the system:

No Fright Zone

Kale — Tue, 05 Jul 2011 22:01:14 +0000

Currently in a phase of implementing missing inputs in Naomi (mostly thanks to the shiny new MIE/JVS core by OG), this makes many games like The House of Dead 2, Zombie Revenge, Airline Pilots and others to be now playable:

Go plat with Satan

Kale — Fri, 17 Jun 2011 17:36:38 +0000

Still working on Sega Saturn, and fixed many issues with it. Here goes some WIP pics (mostly taken from the official Sega Saturn WIP topic there, plus various in-development pics):

There’s still a rather big CD block bug in there (mostly involving command 0×06 and transfers), so compatibility isn’t so great at the moment …