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Post by jlf65 on Jan 11, 2006 13:53:17 GMT -5
What size/age drive did you put in it? A P133 has got to be an old system. I doubt the BIOS would handle modern drives. You mght have to scrounge up a 400M (yes MEG) or smaller drive for it.
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Post by jlf65 on Dec 9, 2005 16:41:40 GMT -5
I've got a nice copy of Windows 3.0, but my pride and joy is a copy of OS2/Warp vers.3. It comes on 21 3.5" floppies. I got it at St. Vincent DePaul for $5. ;D
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Post by jlf65 on Dec 8, 2005 23:40:48 GMT -5
You sure take your cleaning seriously. I don't think I've ever taken a floppy apart to clean it. Good to hear that took care of it. I guess putting a rom image on a floppy would be like the good old days when games came on floppies. I have a BIG box full of Atari games (on 5.25") and another of Amiga games (3.5"). I guess I probably spent a few thousand bucks on them back when I got them, and now they're worth about $5. ;D I love it when I see ads in the paper for someone trying to sell there 386 for $3000. Maybe they paid that much for it when it was new, but now it's only worth maybe $10.
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Post by jlf65 on Dec 8, 2005 12:52:39 GMT -5
Could just be dirty. Those old floppy drives needed cleaning quite a bit. I had both 5.25" and 3.5" cleaning disks and used them regularly. Had to use one just a month ago on the 3.5" in my current system. I don't clean very often now because I rarely use floppies anymore. I haven't had a file that fit on a floppy in YEARS!. ;D
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Post by jlf65 on Mar 23, 2007 16:00:37 GMT -5
I was going to say the same thing - if the bytes are swapped, it's just going to instantly hang. ;D
it would be pretty easy to do a python script to flip the bytes around.
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Post by jlf65 on Mar 22, 2007 16:05:47 GMT -5
I found this thread while looking for information on putting eproms into megadrive carts. Ive got some 16bit eproms - m27c322, which are 42 pins to put some 2megabyte games on. After tracing back the megadrive cartridge connector pinouts back to the game boards rom pinouts - I discovered the only difference between roms in released games and my eproms is that the eproms have two extra address lines. Ive tried leaving the address pins on the eprom unconnected (a19 and a20) and have tried leaving them in, and I still get nothing when trying them on the console. Can anybody suggest what im doing wrong? You can't leave address lines floating... they need to be pulled high or low (tied to power or ground). Depending on which way you pull them will determine where you need to put the data for the game in the EPROM... the best option would simply be to repeat the data as many times as would fit - for example, if the game is 256K, and the EPROM is 2M, repeat the game data 8 times to fill the EPROM.
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Post by jlf65 on Dec 2, 2005 19:59:55 GMT -5
Yeah, I noticed that all the various compilers I found were for the 68K. I like assembly - all my original Amiga programs were 100% assembly, so I'm quite comfortable in it. I was thinking perhaps I should go back to that on the SEGA. It would certainly help as far as keeping the size down. I'm more familiar with 68K assmebly than SH2, but the SH2 syntax doesn't look too bad at all. I think I could get to like it.
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Post by jlf65 on Dec 1, 2005 17:42:14 GMT -5
I think it's a little funny that I found this forum because I was looking for a 32X homebrew devkit with an interest toward making a better DOOM port for the 32X. ;D
I was playing DOOM on my Genesis/32X/CD a couple days ago and thinking I'd at least switch to normal resolution drawing, even if it were slower. Low-res just doesn't do the 32X justice.
I think the biggest problem is the lack of RAM. I made the first port of DOOM to PowerPC on the Amiga years back, but I had plenty of RAM. The biggest problem there was mapping the frame buffer as uncached. Drawing the frames with the cache on flooded the cache, dropping the speed tremendously depending on the resolution and the scene being displayed.
I'm seriously considering making a 4MB SRAM cart for the Genesis to help (DOOM can get by with a 2M heap for game data in the original code).
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Post by jlf65 on Feb 17, 2007 21:53:58 GMT -5
Thanks for the tips. The LCD is the bigget part of making the Radica into a portable. EDIT: I've decided to try and be a little more fancy... I've got one of these coming in that I plan to try to work my Radica into. DVD/MP3/CD/CD-RW and Genesis games in one handy portable tablet. ;D They run about $100 right now, so even if it doesn't work out, I've got a nice portable DVD/MP3/CD/CD-RW player cheap.
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Post by jlf65 on Feb 7, 2007 22:30:02 GMT -5
Cool. good to see you working on this again. I got one of those Radica's myself last year... 89 cents + $8 S&H. ;D
I might try to make it into a portable as well. Any suggestion on where to find parts, like the LCD, would be appreciated.
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