Collapse OS Documentation Browser

doc/protocol.txt

asm/ code/ hw/ avr.txt blk.txt bootstrap.txt cross.txt dict.txt ed.txt faq.txt grid.txt hal.txt impl.txt intro.txt me.txt primer.txt protocol.txt rsh.txt sega.txt selfhost.txt usage.txt

Protocols

Some subsystems (and in the case of KEY and EMIT, the core) re-
quire drivers to implement certain words in a certain way. For
example, the core requires drivers to implement (key?) and
(emit) or else it won't know how to provide a console.

These protocols are described here.

TTY protocol

(key?)     -- c? f Returns whether a key has been pressed and,
                   if it has, returns which key. When f is
                   false, c is *not* placed in the stack.
(emit)     c --    Spit a character on the console.

PS/2 protocol

This protocol enables communication with a device that spits
PS/2 keycodes.

(ps2kc)   -- kc    Returns the next typed PS/2 keycode from the
                   console. 0 if nothing was typed.

SPI Relay protocol

This protocol enables communication with a SPI relay. This
protocol is designed to support devices with multiple endpoints.
To that end, (spie) takes a device ID argument, with a meaning
that is up to the device itself. To disable all devices, supply
0 to (spie).

We expect relay devices to support only one enabled device at
once. Enabling a specific device is expected to disable the
previously enabled one.

(spie)    n --     Enable SPI device
(spix)    n -- n   Perform SPI exchange (push a number, get a
                   number back)
                  
Grid protocol

See grid.txt

Collapse OS and its documentation are created by Virgil Dupras and licensed under the GNU GPL v3.

This documentation browser by James Stanley. Please report bugs on github or to james@incoherency.co.uk.

This page generated at 2021-09-19 21:05:03 from documentation in CollapseOS snapshot 20210917.