Search found 256 matches

by TascoDLX
Fri Jan 20, 2012 11:46 am
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

When I literally do all the exact same instructions as the sub-cpu bios app in both the _usercall0 and _usercall1 entry points, when I hit the very first bios call that gets made, which is $11F, it fails, and I'm starting to see a pattern here. If you email me your binary, I'll take a look at it. O...
by TascoDLX
Wed Jan 18, 2012 10:22 am
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

Where do you get all this information? lol It's all there in the bios. Just takes a little bit of time and a little bit of practice :wink: I was looking for the overlay control, since right now, as soon as I boot the MegaLD sub-cpu bios I effectively lose picture, since the LaserDisk video layer go...
by TascoDLX
Fri Jan 13, 2012 10:39 pm
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

Yeah, I noticed the pausing when I was trying to record video from it on another player. I did need to step-frame in order to access the rest of the data. Sounds like the video was mastered w/ picture stop codes. Some Pioneer players (and maybe others) have a setting to ignore them. Pioneer calls i...
by TascoDLX
Thu Jan 05, 2012 12:55 pm
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 51907

Seems like I need to do something else to setup the hardware for a read before calling the ROMREAD bios functions. Did you call DRVINIT first, and did it succeed without error? There's some other stuff you can try calling beforehand that may or may not be helpful: jsr $5f22 : d0.w = #$011F, d1.b = ...
by TascoDLX
Wed Jan 04, 2012 10:22 pm
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 51907

Loading the MegaLD sub-cpu bios first is not required, but doing a full clear of, at the very least, the first page of program ram is required, otherwise the sub-cpu bios hangs on initialization. Here's your bug confirmation: The model 1 bios decompresses the subcpu bios to a full 22KB, with 14 tra...
by TascoDLX
Tue Jan 03, 2012 1:31 pm
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 51907

I've tested the flux rom, and it can't boot a laseractive either. It starts, but none of the controls work, and it doesn't manage to read the track list. Of course it doesn't. Flux has no idea where the subcpu bios is in the LaserActive boot rom. Best as I can figure, the sub-cpu does boot and star...
by TascoDLX
Sat Oct 15, 2011 9:30 pm
Forum: Mega/SegaCD
Topic: Better MegaCD manual scans from "Sphere, INC"
Replies: 14
Views: 10764

As always, there's the one at Eidolon's: scd_100_us.zip. It's a memory snapshot that includes the sub bios (the first 22KB), the bios SP and its PCM module.

If you're looking for a particular version, it should be easy enough to extract.
by TascoDLX
Fri Oct 14, 2011 9:40 pm
Forum: Mega/SegaCD
Topic: Better MegaCD manual scans from "Sphere, INC"
Replies: 14
Views: 10764

I haven't tested it explicitly, but it should be 512-byte segments. The bios invariably sets the write-protect value to 0x2A in order to protect 0x0000 thru 0x53FF. Incidently, this range is good for the original sub bios, though later versions of it extend past 0x53FF (<= 0x57FF).
by TascoDLX
Wed Oct 12, 2011 3:31 am
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

My attempts to boot the system from a cartridge have been unsuccessful so far. The main cpu does everything I want it to, but when I expect the subcpu to kick in and start executing code, I get nothing. Kinda wish I had the hardware for testing right about now. You might want to verify the sub bios...
by TascoDLX
Wed Sep 28, 2011 9:48 am
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

The LaserActive player detects whether either a CD or an LD has been inserted, and based on that, the mechanism of the drive physically adjusts itself to read the inserted medium (focal distance seems to be different, so the disk sits at a different height). The PAC doesn't have any control over th...
by TascoDLX
Tue Sep 27, 2011 8:14 am
Forum: MegaLD
Topic: Emulating Pioneer LaserActive (Mega-LD) games
Replies: 189
Views: 114183

Fuck. Yeah. :D What I've done is to allow the LaserActive to start a MegaLD game, then as the game is booting, hijack the main M68000 processor and run my own code, which is in tern able to lock/reset the sub M68000, and read/write its program memory. The above data was obtained simply by dumping ou...
by TascoDLX
Tue Aug 02, 2011 12:07 pm
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 69448

Some games use CD-DMA, which requires more than just BIOS interaction. It would seem to me that only games that came on cart that tried to use the CD would need to be able to handle the CDC directly... games like Pier Solar... of which there's only one - Pier Solar. Nope. Pier Solar uses the BIOS. I...
by TascoDLX
Wed Jul 20, 2011 7:06 am
Forum: Megadrive/Genesis
Topic: Super Magic Drive research thread
Replies: 133
Views: 104756

Yes, my immediate thought looking at the SMD is Jaguar CD. Is that it? I don't care to be the one to second-guess the Sega CD. But with a framebuffer and improved color depth, it would have been quite intriguing -- a whole different ballgame, even. It's a nice fantasy. That said, I kinda enjoy the s...
by TascoDLX
Tue May 31, 2011 6:54 am
Forum: Blabla
Topic: The death march
Replies: 11
Views: 4483

SOMEONE has to be tracking the hours, and if the employee does it and hits their boss with it, you can bet the boss will put in their own time clock, and/or fire said employee. You refer to this statement: Among other things, those regulations require employers to maintain detailed records of hours...
by TascoDLX
Mon May 30, 2011 3:23 am
Forum: Blabla
Topic: The death march
Replies: 11
Views: 4483

If you don't punch a time clock, you aren't being paid by the hour, you're a salaried employee and overtime doesn't apply to you. Period. Under the FLSA, an employer is not legally required to track the actual hours worked by exempt employees. For the reasons I mentioned earlier, game development e...