I've been hinting that this was in the works for a while now. And I figure its time to start revealing a bit of what I have been working on for the last 1-1/2 years. I call it the 1088XEL. Why? Well for one thing thanks to Lotharek's U1MB board and the on-board 64K RAM, there is a total of 1088K of usable memory. Basically the idea behind this project is to create something that is designed from the ground up to accept some of the most popular upgrades as plug-in daughter boards. Yes no more making up wire harnesses, crimping terminals, scratching your head and trying to figure out where to mount things.
The other goal of the project is create a very small footprint mother board. I'm talking about something in the area of 6" x 6" (15x15 centimeters). And to utilize only thru-hole components, as well as the original five A8 LSI chips (Sally, Antic, GTIA, Pokey, PIA). Actually there will be an additional Pokey on board to support Stereo Sound. If you've been following some of my other projects, then you've witnessed the nesting technique I wish to exploit when laying out this board, which is how I will get it shrunk down to such a small size without resorting to surface mount devices.
The first prototype will initially be created as an NTSC version board, but will provide support for an upgrade path to PAL via a future daughter board design, an oscillator change, and of course PAL Antic and GTIA chips.
I have taken some liberties at reducing the component count by eliminating capacitors, some support chips (through utilization of SRAM memory), and just not caring too much about RFI radiation issues. Me bad
So for all intents and purposes this will still be a 'real' Atari 8-bit computer as far as the basic hardware is concerned (not an FPGA implementation).
Now for the big reveal (please keep in mind that these are preliminary schematics, and that the design is still in flux, so in other words there might be a few mistakes and omissions )...
Edited by mytekcontrols, Tue Jan 17, 2017 1:57 AM.