VGA display terminal for RC2014 and other applications
The design goal here is to provide a VGA resolution terminal (640x480) at the standard 25.175MHz dot clock rate. Input would be a serial port at up to 115200 baud, with ANSI escape sequence processing and perhaps eventually a graphics mode with Tek40xx or DEC REGIS graphics. The target hardware is the Digilent CMOD-A7 with an Artix FPGA and 512kB of asynchronous SRAM.
The text display will be prototyped on a Basys-3 evaluation board and use only block RAM onboard the FPGA for text display.
Currently a basic terminal with CR/LF and no scrolling is working. See terminal.psm.
To Do:
- Cursor (block, reverse video)
- Scrolling
- Basic ANSI cursor positioning and editing sequences, enough for WS and VEDIT
- The first few SGRs
More:
- Support for 8x8 font with 60 line mode (and some escape sequence to switch)
- Graphics
- Keyboard baud rate translator