This is a totally weird self serving project that quite frankly just shows what happens when the frantic gears spin out of control in my bored little brain. Nothing you see here was born out of necessity, nor does it fill a niche that needed filling. And most likely there will be those that will scratch their head and wonder WTF is this good for! And for those devoted Atari hardware preservationist, I'll warn you now that 1050's will die before this project is done (and many more, if this spreads). So if you can't stomach the thought of that, it's best that you stop reading this immediately, curl up into a little ball, and pretend the world is sane.
Are you still here?
Good, let's proceed.
As some of you may already know, this all began a few days ago when I proposed putting a 1088XEL motherboard into a 1050 floppy drive case.
Well that was going to get very messy real fast, with lots of wires and dangling bits holding it all together. So like any reasonable and somewhat lazy person would probably conclude "I decided no way was I going to do that!" But the idea wouldn't die. And to add fuel to this, a posting in a PM suggested designing a new motherboard for a few dead 1050s they had laying around gathering dust. Stupid me latched onto 'new motherboard', and at first I thought that was totally crazy, after all I just finished a big project like that earlier this year, and I just wasn't feeling it. Little did I realize that they weren't on the same wavelength as me, and were really talking about a custom XF drive board that would fit into a 1050 case. Not a bad idea in itself, but that's a whole different story, for an entirely different thread.
Anyway the gears kept turning, and I thought that would be kinda cool and somewhat awesome to have a A8 computer motherboard that would drop into a 1050 case, with no, or very little modification. And even better still if it could piggyback on the 1088XEL project with an internal CF drive that could utilize flashjazzcat's 1088/U1MB Bios to make that CF drive really purr.
I started getting excited, and the ideas just came pouring forth, a dangerous phenomena to say the least . So suffice it to say a new alternative motherboard project was born.
Please welcome the 1088XLD
1088 - Total amount of RAM memory due to built-in U1MB.
XL - Because we are packaging this in a 1050 case, it'll take on the style of this iconic series.
D - Just like the 1450XLD it'll sport an internal drive, although a much faster and more capable solid state one.
Obviously I have a long ways to go. But it's a good start, and since it will re-purpose a lot of the 1088XEL design, it should go much more smoothly through the development process.
PCB Image UPDATED On August 8th 2018, now much closer to final layout
- UAV (routed to standard DIN-5 rear panel video jack)
- Will support PAL or NTSC configurations
- Integrated XEL-CF3 electronics (will leave MPBI+ expansion bus free)
- Rapidus, VBXE, and P-Covox interface control signals to be provided by independent header
- 9 VAC power derived from stock 1050 PSU
- Internal 5 VDC and 12 VDC regulation via cool running switching regulator ICs
- MPBI+ (same as the 1088XEL MPBI expansion bus, but also sporting the missing upper address bits for a full interface, and added 12 VDC)
- PS/2 Mouse and Keyboard front panel jacks
- Front panel Joystick ports and 3.5mm Stereo audio output jack
- Dual Stereo Pokeys with electronic Mono/Stereo switching via the U1MB
- V-Gate chip to kill video overscan
- Dual SIO ports
- Front access cartridge port
The journey begins