Search found 178 matches

by notaz
Tue Apr 18, 2017 10:40 pm
Forum: Demos
Topic: OVERDRIVE II
Replies: 29
Views: 5128

Re: OVERDRIVE II

http://notaz.gp2x.de/img/hw/megadrive_model1.jpg http://notaz.gp2x.de/img/hw/megadrive_model1_case_back.jpg (with MED + both addons attached) Just like the demo itself warns, some plane glitches on "where is she" and few other scenes. Other than that, really enjoyable demo, much appreciated! Thanks ...
by notaz
Wed Apr 06, 2016 2:20 pm
Forum: Hardware
Topic: Networked Genesis hardware
Replies: 4
Views: 1626

Re: Networked Genesis hardware

I don't think this can work, the machines will desync eventually because of oscillator variations and no game hacks will be able to compensate it. There is also a problem of not fully defined state the machines start in and you'll get a desync at the very start of the game.
by notaz
Thu Jun 25, 2015 3:43 pm
Forum: Blabla
Topic: "Still Alive" (Sega-to-Sega communication) demo
Replies: 3
Views: 2331

The I/O ports have 7 pins which can be programmed as input or output, so it's possible to program any protocol you like to exchange data between the machines or even PC parallel port. The achievable bitrate is in tens of KiB/s.
by notaz
Wed Jun 10, 2015 4:44 pm
Forum: Hardware
Topic: I/O Ports read upper byte
Replies: 1
Views: 1936

IIRC it's just mirrored, it's also documented in gen-hw.txt
by notaz
Wed Jun 10, 2015 4:42 pm
Forum: Megadrive/Genesis
Topic: MOVM.L syntax
Replies: 4
Views: 1588

Why not just use as --register-prefix-optional ?
by notaz
Wed Jun 03, 2015 12:12 pm
Forum: Hardware
Topic: Cartridge interrupts?
Replies: 4
Views: 2275

Well even expansion port can't do it, SegaCD has to get away without interrupts to MD's 68k. You are partially right about Z80, partially because it only works in master system mode (one of address lines is then repurposed for Z80 NMI). The only things I can think of is connecting a wire to one of I...
by notaz
Tue Apr 28, 2015 5:39 pm
Forum: Demos
Topic: Miniplanets
Replies: 5
Views: 1639

Maybe it's time to lift the ban - times change and people occasionally do too.
by notaz
Tue Apr 28, 2015 5:33 pm
Forum: Exodus
Topic: Exodus 2.0 + Open Source Release
Replies: 105
Views: 20813

I've noticed a donate button - be aware that PayPal doesn't like emulators and has frozen accounts of several emulator authors recently.
by notaz
Mon Jan 12, 2015 1:50 pm
Forum: Mega/SegaCD
Topic: MegaCD2 Japan Bios on PAL MegaCD2
Replies: 23
Views: 6908

l_oliveira wrote: I booted the USA 1.10 SEGA CD ROM this way on a TMSS VA6 MD1.

The unmodified SEGA CD BIOS satisfied the TMSS check and stuff worked correctly.
Nice, wasn't expecting it to handle that as it doesn't have to.
by notaz
Mon Jan 05, 2015 1:54 pm
Forum: Mega/SegaCD
Topic: MegaCD2 Japan Bios on PAL MegaCD2
Replies: 23
Views: 6908

How does the Everdrive work for this case exactly? Maybe by watching address bus and toggling CART_IN during BIOS access? Isn't it the case when a cart is inserted the CD BIOS (the original one in the Mega-CD) gets mapped to 0x40000000 and cart is mapped to 0x00000000 and this swaps around when car...
by notaz
Tue Dec 02, 2014 1:33 am
Forum: Demos
Topic: Sonic romhacks playing themselves to completion
Replies: 0
Views: 2247

Sonic romhacks playing themselves to completion

These are currently fastest Sonic TASes (tool-assisted speedruns) hacked into the ROMs themselves and resynced to play on real hardware. Usually to play a TAS on real hardware, some sort of device is needed to be connected to controller port(s) to feed the inputs, with this any console with a flashc...
by notaz
Mon Nov 24, 2014 4:20 pm
Forum: UMDK
Topic: UMDK Manufacture: who wants one?
Replies: 170
Views: 31047

If you get another free spot you can post here, I (or someone else) may consider taking it.
by notaz
Mon Nov 24, 2014 4:04 pm
Forum: Hardware
Topic: Current Consumption Measurements of Various Game Cartridges
Replies: 9
Views: 4376

EU version also has the shied. Notice some differences on chip markings:
http://notaz.gp2x.de/img/hw/virtua_racing_front2.jpg
by notaz
Wed Oct 29, 2014 5:41 pm
Forum: UMDK
Topic: UMDK Manufacture: who wants one?
Replies: 170
Views: 31047

I'm now considering taking one as well as it would help with my current project, but not 100% sure as it kind of depends on when it's ready.
by notaz
Sun Oct 26, 2014 7:41 pm
Forum: Cartridge
Topic: About !DTACK timings
Replies: 12
Views: 4362

So, has anyone investigated the memory mode register? I don't have a logic analyzer, but from looking at spinning loops it seems it has no effect on 68k's bus access timings.