Search found 159 matches
- Mon Aug 24, 2009 3:25 am
- Forum: Controls
- Topic: 6Button reading routine, C code and a glitch!.
- Replies: 11
- Views: 24668
- Sat Feb 14, 2009 1:01 am
- Forum: Blabla
- Topic: Electro for newbie
- Replies: 13
- Views: 9467
- Sat Feb 14, 2009 12:56 am
- Forum: Blabla
- Topic: Genesis upload with controller port #2
- Replies: 5
- Views: 5412
You can use any of the three ports as either serial (up to 4800 baud, with a TTL interface) or parallel. I've used the rear port along with a version of Macsbug that I hacked up from the oldest Macintosh version I could find. Zero Tolerance uses a parallel mode. You can also do wierd stuff, like the...
- Tue Jan 27, 2009 11:42 pm
- Forum: Demos
- Topic: [Request] Real machine test
- Replies: 47
- Views: 28139
CLR, BTST and some other instructions cannot be used with VDP :) That is correct. CLR is a read/modify/write instruction just like AND and OR, even though it ignores the read value. I learned this years ago when working on a boot rom for a 68000 system that used parity RAM. This was in the initial ...
- Thu Nov 13, 2008 6:44 am
- Forum: Super 32X
- Topic: wait states
- Replies: 8
- Views: 7730
- Tue Nov 11, 2008 9:40 am
- Forum: Megadrive/Genesis
- Topic: Mega CD and compatibles BIOS dumper kit
- Replies: 11
- Views: 9702
- Sun Nov 09, 2008 9:18 am
- Forum: Megadrive/Genesis
- Topic: Mega CD and compatibles BIOS dumper kit
- Replies: 11
- Views: 9702
http://sega.fanboy.net/files/laseractive-bios-1.04.zipNemesis wrote:Only the v1.02 of the Pionner LaserActiv bios is dumped. I know there is a v1.04
I don't remember whether that's the one from my own Laseractive or not, but my Laseractive has a socketed EPROM for its BIOS, so I dumped it long ago.
- Sat Nov 01, 2008 2:41 pm
- Forum: Megadrive/Genesis
- Topic: Checksum calculation (slow in GCC)
- Replies: 9
- Views: 7066
- Thu Jun 12, 2008 12:54 pm
- Forum: Hardware
- Topic: An idea for a development pcb
- Replies: 9
- Views: 9528
I would rather do a sidecar board on the expansion connector. Genuine Sega units are easier to find and should be easier to work with than a geniclone. And for a dev board, I think I'd rather have an ethernet port, though SD or MMC would probably be a bit easier to program than ethernet. It's just t...
- Fri Jun 06, 2008 2:36 pm
- Forum: Hardware
- Topic: Genesis Flash Card?
- Replies: 24
- Views: 21336
You can buy a PCI addon card with LPT port. That works fine if all you want to do is talk to a printer. Most stuff that does bit-banging on the parallel ports wants to talk directly to the interface chip, and has problems with PCI LPT cards because they don't use the "standard" port addresses. You ...
- Mon May 12, 2008 12:46 pm
- Forum: Megadrive/Genesis
- Topic: snasm68k sections and alignment
- Replies: 9
- Views: 11725
- Fri May 09, 2008 2:42 am
- Forum: Regen
- Topic: Old Regen pages
- Replies: 547
- Views: 782454
I'm just asking a little question: is there going to be a Mac OS X port of Regen in the future? I like Mac OS X very much and would love to use Regen on there, as the emulators available (except for MacGens, non-native, requires X11, and crashes very often) are all monopolized by some Richard Banni...
- Fri May 09, 2008 2:23 am
- Forum: SGDK
- Topic: Sega Genesis Dev Kit (SGDK)
- Replies: 852
- Views: 1188997
It's an issue with all compilers. They expect the values to be initialized before calling main(). It's all in how you set up the linkage. For a binary that loads into an operating system, you want the initialized segment to load right into memory along with the code. For ROM code, you need two thin...
- Fri Apr 04, 2008 8:53 pm
- Forum: Regen
- Topic: Old Regen pages
- Replies: 547
- Views: 782454
A fully endorse. However, breakpoint for access at address will be more useful than breakpoint on PC. Very ask this. For example, if breakpoint to access to memory $FF0001, a0=$FF0000, then the opcode move.l d1,$0001(a0) will breakpoint cause. Well, and so forth. Actually both break on PC address a...
- Tue Mar 18, 2008 3:06 am
- Forum: Regen
- Topic: Old Regen pages
- Replies: 547
- Views: 782454
I would presume that's when you have, say, a 256Kbyte ROM, and access space outside that ROM. You will find that the entire 4 megabyte space will be identical copies of that same 256K of ROM because the higher address lines are ignored in the cartridge hardware.Eke wrote:PS: what is address wrapping ?