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Sweet, have fun with the EPROMs

Im glad they arrived ok. USPS has a bad habit of not updating tracking information and half of the time i checked on the ones i sent out, they had no info. Your was one of the ones without info.

Alrighty, It is now sadly time to close the offer so I can save the remaining for my junk shop. As far as anyone who said they wanted some before this message, I will still ship some out your way for the shipping costs listed earlier

This, and also, which sizes do you have? Are there any 16 bit EPROM?

27c64, 27c128, and 27c256's are what I am offering. [/quote]

Of course it's fair. :D I'll try to persuade my father to buy a cuple trays for him and myself. :D 9000....holy crap. Any back story on how you came about them? :) Just got lucky, I decided to hit up a surplus sale for a local college, one of the departments cleaned out their storage and no one kne...

these are Mitsubishi EPROMs, part number M5L27256K. they are 250ns chips. here is a picture of 5 trays of the 27256 EPROMs, each tray has 14. http://idahojunkshop.com/ebayimages/M5L27256K/Mitsubishi-M5L27256K-2.jpg How does 28 27256's sound for the price of a USPS Small flat Rate Box? $5 for the US ...

It depends on the size, and I am offering the EPROM's. They come in different size trays depending on what size of EPROM you want.

Good day everyone! I just purchased over 9000 27c256, 27c128, and 27c64's (among other things) that have never been used for $20... and I would like to share the wealth.... so here is the deal! If any regular here would like some, I will gladly ship you a tray or two of EPROMs if you pay for shippin...

i have a few thousand new 27c256, 27c128, and 27c64s in my back seat... they are cheap

The CGA adapter generated pixels at 4xNTSC (14.318MHz) or 2xNTSC. The full timing (which I ripped from the monitor-compatible IBM EGA bios) for all modes is some variant of- 0 visible-period A right-overscan B right-blanking C sync D left-blanking E left-overscan F Horizontal: A = 80 (640) B = 89 (...

Has anyone else here had NES related dreams? I know someone who used to have nightmares about Pipe Dream, and other times just dreamed that she was playing Pipe Dream. I just had a strange one myself and I am not sure what triggered it. Anyways, the dream started out at an airport waiting to fly som...

hehe, I have plans to release what I am working on... the video portion and more. I am going to do a few tests with hardware only to drive the video.. to get any timing issues and what not worked out and then re-implement it using a micro-processor. In case anyone is curious, the whole project is a ...

Hamtaro126: I will be using just the monitor and making my own driver for it, I plan on having a 40x25 2-color text mode with ascii char rom, a 40x25 16 color tile mode (using ram for tiles) and a 320x200 16 color bit-mapped mode. As for the max res of an actual CGA adapter, I believe it was a 640x2...

as far as i know, they are fairly similar (if not the same). I know a lot of CGA cards also output as a composite signal so it would not surprise me. Im glad to hear those calculations are what you used. hopefully everything will work for me.

I have been toying with the idea of making my own monitor driver to output to a CGA monitor, I have not dealt with video too much so I would like to ask some input and see how far off my calculations are. Bandwidth: ~ 5.8MHz HSync: ~ 15.75KHz projected resolution: 320x200 based on the 5.8MHz bandwid...