We have sold the Wizztronics 256K Ram bare Upgrade board PCB to Atari 800XL owners for about 14+ years now.  Using this Wizztronics 256K upgrade board, you can Pump up your Stock Atari 800XL computer to 256K of usable Ram Disk Storage.

These assembled versions of the normally bare Wizztronics 256K upgrade boards, including the double sided 16 pin header (Blue) for easy installation and are set up for All Atari 800XL computers that have the CO12296 Antic Chip.  If you have the CO21697 Antic Chip you will have to install 2 additional TTL chips.

Depending on your exact Atari 800XL configuration, you might have to install (unsolder and solder in 9, 16 Pin I.C. Sockets) for the required 8, 256K ram chips and Installation board Header.  You will have also unsolder and lift 7 pins on the Pokey chip so you can attach the supplied ribbon cable.

Supplied:  1 assembled Wizztronics 800XL 256K upgrade board, with installation instructions.

Not Supplied:  The Atari 5 1/4 Ram Disk Software to drive the Upgraded 800XL Ram, Solder,  I.C. Sockets, Extra TTL chips if required and 41256 Ram Chips.  Most items are available Thru Best Electronics.

Required:  The ability to Unsolder and Solder in Components, The ability to read a Component layout Print.

Without the 800XL Ram Disk Software, the upgraded 256K Atari 800XL computer will act like an Stock Atari 64K computer.  The only Stock Atari 8 bit software that will access the 800XL upgraded 256K Ram, are Atari Stock programs that can normally Access the Atari 130XE extra Ram banks, like Atariwriter Plus Word Processor program.

Limited Supply!

CB101070A  Assembled Wizztronics 256K 800XL Ram Upgrade $19