Glasgow Embedded / Glasgow - History

applet.internal.selftest: fix pins-loop.

Changes in bea50eb8 & 5506af77 broke pins-loop.

README: clarify timing claims; make "minimal effort" more realistic.

In this case "minimal effort" refers to using 2FF synchronizers and
a simple FSM driven by the system clock, which, when using revC at
48 MHz will not exceed 12 Mbps data rate. However, virtually anyone
with a minimal knowledge of HDL is able to implement applets that
use this technique.

applet.program.m16c: add links to actual Renesas documentation.

And some explanation on the applet's structure.

Also, adjust code where appropriate according to vendor docs.

applet.interface.uart: add repl command.

Useful for playing with binary interfaces over UART, for example
MCU bootloaders.