Prototyping Blog page 3
here be found pictures of a 128 board displaying new fangled resolutions - the rotter...
Topside overall view again - the only additional things from last time being - Mouse/Keyboard PS2s, SD card socket and VGA port. SD cards have very fast sharp rise times - sitting this sort of thing next to sensitive video signals on a board without a groundplane was an interesting (not!) exercise in moving the wiring and termination resistors about for 6 hours.
The images are clickable for larger size.
Sorry for the blurry photo - this is the SD card - mounted poorly at the moment due to the cabling from the PS2 Mouse and Keyboard - works fine though. The VGA port connects to the RHS with matching network right on the pins just behind it.
The hello world of Video...
It took a few hours to get the high res. modes looking pin sharp and rock solid.
A high resolution debug screen demo with mouse and clickables.
The DOS...
Tung Sol
A full featured basic - needs some external ram to do it justice.
The next screens are from the TV output - sometimes these were runninng at the same time as the VGA demos I showed earlier depending upon the number of cogs needed by the display resolution and colour count.
Yes... it is...
... Thank Heaven for IrfanView Batch Photo Manipulation ....
...As usual, any comments welcome ....