Wow, Stephen! This is SUPER exciting! I don't suppose you have any early pictures or screenshots to share at Tandy Assembly?
-Josh On Sat, Nov 3, 2018 at 12:56 PM Stephen Adolph <[email protected]> wrote: > Last year around this time I sent a note talking about REXCPM, a REX-like > board that is based on 2MB of SRAM, with some features to enable all-ram > mode + ramdisk. > The project is going well, although a bit stop and start on my side..3 > board spins. The hardware is working, and I'm about to mail a version for > M100 to Phil Avery. > With any luck we will get CPM running on a M100 with a plug and play > hardware upgrade. > > Now, on to the next thing. > What's shown below is my prototype "mtvga" model T VGA card. > > [image: 54ff6876701ffe1903352f9643ea838c.png] > > This board is my development board. It will plug into the back of a T102 > on the system bus connector. > > Here's the basics- > * supports 640x400 VGA monochrome (green) > * that will enable 80x25 text > * I hope it consumes no more than 30mA but we shall see (powered by M100) > * uses a Coolrunner XCR3256XL CPLD, and a single 128kB SRAM for character > bit maps as well as video RAM. > * this board also includes a serial port, so I can play around with > high(er) speed serial to see just how fast the M100 could go. (this is > important when backing up a 2MB ram disk) > > There are several similar projects on the net that describe how to > accomplish this, so I believe it should come together. >
