modern serial terminal
classiccmp at philpem.me.uk
Sun Nov 4 14:33:58 CST 2007
David Griffith wrote:
> How hard would it be to create something like this? How much would it
CPU: I'd use an ARM or Coldfire CPU - a Philips LPC2000 in External Memory
mode, or a Freescale MCF5307. Give it a bit of external RAM and Flash, and a
CPLD to handle VGA signal generation and supply the glue. Add some keyboard
input logic to said CPLD and flash it with U-Boot and Linux. Teach Linux how
to control the VGA (basically write a framebuffer driver) and shoehorn a
terminal emulator onto it. Bolt on an EEPROM or cheap RTC chip for
configuration storage. Job done.
Total parts cost: About £50 tops, excluding PCB and case. Probably about £100
Development time: Most of the OS is done already - the framebuffer driver
would be the hard part. I haven't seen much documentation on fbdev/fbcon.
Is it worth it? Not really, IMO.
What would I do? Get a cheap laptop. A 486SX or something. Put Linux on the
hard drive (or shove a cheap CompactFlash card and adapter in there). Voila,
instant portable terminal.
Phil. | (\_/) This is Bunny. Copy and paste Bunny
classiccmp at philpem.me.uk | (='.'=) into your signature to help him gain
http://www.philpem.me.uk/ | (")_(") world domination.
More information about the cctalk