Need help reading a schematic.
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Re: Need help reading a schematic.
I remember when I was a child, I used to tear stuff apart, trying to figure out what made it tick. I remember tearing something about and there was this numerical display. Kind of like the 7 segment LED displays but this thing had miniature glass tube like things that would light up. They where stacked on top of each other. One was a 1, then a 2 on top of that, a 3, etc. I thought that was freaking amazing.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
I did buy the kit but I'm still waiting on a few things (the UV LED PCB and the UV LEDs for it). I got the timer kit already finished. The guy was selling multiple kits. For example, the timer was one kit. Then there was the UV LED PCB kit. Finally, there was a power supply. I have the timer already finished and I have the PSU. Here's a link to the PSU. http://www.e-stynus.com/index.php?ma...products_id=60
I think originally he designed the PSU himself but later decided to just use a pre-manufactured one. It's a 15V, 36 Watt DC power supply, model number: MW-RS-35-15.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
dont overdose!!!Comment
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Re: Need help reading a schematic.
Do you get to keep it or is it someone elses? That's nice man. I have a friend who's father has an Osborne (1 I think). I'd love to find one of those Executive's but I don't even know if any exist. Very few where actually sold because Osborne ended up filing bankruptcy. Some people contribute the fall of his company to the Executive. He was showing it off to Journalists before it was ready and people that had pre-ordered the Osborne canceled their order. They decided to just wait until the Executive was released. Sales dropped a lot. It was something like in one month, the Osborne 1 went from 1,200$ to 900$ (and change). I've been trying to get the Osborne off my friend for a few years now. Still no luck though.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
LOL! Yeah, we actually try not to watch the news. It just seems in this country at least, violence sells. We never see anything happy on the news. Always the worst of the worst or mud slinging when election time comes around.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
someone elses.
i do have one in storage,
may have to dig it out because i just found this:
http://spritesmods.com/?art=veccart&page=1Comment
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Re: Need help reading a schematic.
someone elses.
i do have one in storage,
may have to dig it out because i just found this:
http://spritesmods.com/?art=veccart&page=1
Also, with the design that the guy created on the site you linked too...I see he decided to go with assembly for the firmware because he said it gave him finer control of the functions he was executing. I'm fairly good with C. Not so much with assembly but I'm sure it wouldn't take too long to improve my Assembly knowledge. The assembly he's using is for the microcontroller, not the Vectrex, right? I had trouble learning assembly for the 8502 that the NES uses.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
Are you talking about stuff like this?
https://upload.wikimedia.org/wikiped...ormat_1977.jpg
That's freaking old school! Wow. Do people still do that stuff? I got an old tube amp I'm supposed to fix for my buddy that's wired that way.Comment
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Re: Need help reading a schematic.
Yes, it is a good way to proto-type a board as it is easy to unscrew the wire wraps to change the circuit connection. Only problem is that it is only good for about 2 years as the connection start to oxidize. With a wire wrap gun many connections can be made quickly. With soldering every time one un-solders and re-solders a joint it weakens that joint. Wire wrapping the wire actually cuts into the post.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
it could theoretically be ported to any 8bit system with games that arent banked.
you would need to re-write the selector-menu for the host system.
i think master system may be a problem, i think the roms are banked - i know nothing about snes - isnt it a 16bit version of a 6502?Comment
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Re: Need help reading a schematic.
the way he did it is interesting.
it could theoretically be ported to any 8bit system with games that arent banked.
you would need to re-write the selector-menu for the host system.
i think master system may be a problem, i think the roms are banked - i know nothing about snes - isnt it a 16bit version of a 6502?
I still don't have a Master System so I'm not too interested in that right now. The NES would be the main one. Maybe you'd like to try and tackle it with me sometime? You work on modifying the hardware, I'd work on writing the code. I'd pay for the supplies if it didn't turn out to be too expensive. Maybe we could sell them and split the profits or something or just release it open hardware for others to use?
One last thing. What do you mean by banked games? Do you mean pages that can be remapped to different internal ROM banks?-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
Here's a little info on one of the NES mappers and how it works in regard to banking. Would that make the NES ROMs banking ROMs?
http://wiki.nesdev.com/w/index.php/MMC1#Banks-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
Yeah, turns out other people have already made some multi-carts for the NES. It looks like it'd be a huge project, software wise at least. I'd need to write the mappers and I don't really want to do that.
On a side note, when you say you can writ 6502 assembly, can you write code that the NES understands or code that an NES emulator understands? The code is a little bit different from the code for a pure 6502 (not Nintendo's modified 6502). I write some code once for an NES emulator. All it did was display a dot on the screen and if you pressed the over button, it'd move over. If you pressed up or down, it'd move up or down. My friend was supposed to work on the graphics but he never did. I struggled a lot with the graphics part of it. I didn't research it much because he was supposed to but the sprite editing program I found was a bit confusing. If you can write code for the NES, what do you use for drawing the sprites?-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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Re: Need help reading a schematic.
Technically, I think the CPU the NES uses is a Ricoh 2A03. I believe it's just a modified version of the MOS 6502.
Originally, MOS developed it then Commadore bought it and sourced it to Rockwell and Synertek. After that though, a few other companies got access to it. I don't know who though. Chuck Peddle's team at MOS developed it.-- Law of Expanding Memory: Applications Will Also Expand Until RAM Is FullComment
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