ClausB

Has anyone ever done an SIO disk interface for the 5200? Seems it could have been cheaper back in the day to distribute 5200 games on floppy than in carts, though the up-front cost of an Atari drive might have put off potential customers. Or were there just not enough 5200s out there for the software houses of the day to bother?

This site has cool exploded drawings of the 400. But what's amazing is that they still offer parts for sale, apparently. Is this for real?
http://www.searspart.../0501200?blt=05

In this post
http://www.atariage....ost__p__2434326
I uploaded two 3Kx2K JPGs.

When I click the thumbnail it reports the original file size but clicking SAVE downloads a 1200x900 reduction of the image. I tried it on Safari, Chrome, and IE. I also looked at my attachment manager and it still reports the full file size.

Is it normal for the site to downsize JPGs? If so, then why not do it on upload instead of on download? Is there another way to download the full JPG? Am I missing something here?

Thanks.

Mine was a TI SR-56 with only 100 bytes of user RAM, in 1977. The only way to save a program was with pen and paper.

http://pwp.att.net/p...geid=350942&ck=

The Atari 48K board was meant for the 400 but with minor modification, an 800 can use it just as well. In this post I specified which pins to jumper on the 800 motherboard so that the board would work in Slot 1. Another poster wired and tested it. Since then another poster sent me an actual board and I built this schematic diagram (starting from Jerzy Sobola's 16K RAM schematic):
 48K.GIF   33.45K   73 downloads

Notice that the board really contains 64K of RAM though not all is used. With this information I have designed a series of mods to the 48K board and the OS ROM board that should work without modifying the 800's motherboard or other internal board. So no disassembly of the case is required. Furthermore, the mods are reversible as no permanent damage is done to the boards besides soldering some wires and bending some pins. That should preserve the ever increasing value of these collectible machines.

Of the three mods, the first and simplest provides full 48K from Slot 1 alone. The second gives 52K, filling the 4K block at $C000 with RAM. The third mod allows RAM to take the place of the OS ROMs, as in the XL machines. Surprisingly, the board contains enough spare gates to implement the ROM/RAM switching.

I have not yet built and tested these mods, so anyone is welcome to try them and report on the results. I will post each mod here soon.