Seems to me a P2 will do this with a big ROM attached instead of the SDRAM. Character based HDTV displays are easy, even at the low 60Mhz clock. 80 characters at 24 pixels is 1920 total. 1080p or i won't matter too much is over 40 lines, depending on the vertical size of the tiles.
For now, loading up the bitmap data into SDRAM works for testing. The current FPGA emulation is capable of this task with lots of room to spare. A real P2 chip is going to do it nicely, with options.
If somebody wanted to, a P1 could drive an HDTV monochrome with the current video setup. Just send the DAC output into the "Y" component signal input on most HDTV sets. The sweep frequencies are lower that way, basically about 2X the 15Khz NTSC SD Sweep.
I once drove my old Amber screen at 1280 pixels using one COG, monochrome 15Khz sweep. The screen tops out at 800 pixels or so, maybe 900. Never really checked. Mostly was just seeing where the limits on TV signals were.
A two or three COG video driver solution could drive an HDTV component "Y" input at 1280 pixels... Seems to me, a P1 could at least do a 20x20 or maybe 30x20 something display of this type using HDTV display and only a few pins. We know VGA can go to 1600, but that's most of the chip, and a pretty high horizontal sweep which doesn't leave much time...
I see 800, 1024, 1280 pixel HDTV analog 7" or so displays out there now...
Hi Coley,
Can you please post the modified Gameduino driver. I've got an ConnectEVE connected to a propeller protoboard and can't seem to get it working.
I've got a blank screen and it is staying that way. If anybody can get me started it will be appreciated.
Comments
For now, loading up the bitmap data into SDRAM works for testing. The current FPGA emulation is capable of this task with lots of room to spare. A real P2 chip is going to do it nicely, with options.
If somebody wanted to, a P1 could drive an HDTV monochrome with the current video setup. Just send the DAC output into the "Y" component signal input on most HDTV sets. The sweep frequencies are lower that way, basically about 2X the 15Khz NTSC SD Sweep.
I once drove my old Amber screen at 1280 pixels using one COG, monochrome 15Khz sweep. The screen tops out at 800 pixels or so, maybe 900. Never really checked. Mostly was just seeing where the limits on TV signals were.
A two or three COG video driver solution could drive an HDTV component "Y" input at 1280 pixels... Seems to me, a P1 could at least do a 20x20 or maybe 30x20 something display of this type using HDTV display and only a few pins. We know VGA can go to 1600, but that's most of the chip, and a pretty high horizontal sweep which doesn't leave much time...
I see 800, 1024, 1280 pixel HDTV analog 7" or so displays out there now...
My good lady wife bought me one for Christmas, it's really quite good.
I adapted Martin Hodge's Gameduino driver to get a quick test done.
That looks very nice.
What a wonderful wife you have there.
Can you please post the modified Gameduino driver. I've got an ConnectEVE connected to a propeller protoboard and can't seem to get it working.
I've got a blank screen and it is staying that way. If anybody can get me started it will be appreciated.