Zilog 8530 (ZSCC) serial communications
zs* at fhc?
zs* at sbus?
zstty* at zs?
zskbd* at zs?
wskbd* at zskbd?
zsms* at zs?
wsmouse* at zsms?
is a Zilog 8530 serial interface chip used
in SBus-based UltraSPARC Sun workstations. The Zilog 8530 provides two
input/output channels per instance. Most Sun workstations include two of these
interfaces. One of the interfaces is usually hardwired for use by the keyboard
and mouse attached to the workstation console. The
devices connect keyboard devices to the
generic keyboard driver wskbd
devices connect mice to the generic mouse
remaining additional zs
interfaces provide RS-423
and RS-232 serial ports for general purpose use.
driver supports all of the standard
ioctl calls. The status of
the DTR, RTS, CTS, and DCD signals can be queried with TIOCMGET command, but,
due to limitations in the hardware, only the DTR and RTS signals can be
modified with TIOCMSET, TIOCMBIC, and TIOCMBIS
driver supports a number of different key
mappings. By default, the layout corresponding to the keyboard model as probed
by the zskbd
driver will be used. A different
layout can be chosen either with the kernel options
“SUNKBD_LAYOUT” (for type 4 keyboards) and
“SUNKBD5_LAYOUT” (for type 5 keyboards) at compile time or with
the utility wsconsctl(8)
(variable: “keyboard.encoding”) at runtime.
Other mappings can be used if the whole keymap is replaced by means of
. The built-in
mappings are at this time:
- (be) Belgium French (type 4 only).
- (de) German.
- (dk) Danish.
- (es) Spanish.
- (fr) French (type 5 only).
- (it) Italian.
- (jp) Japanese (type 5 only).
- (nl) Dutch.
- (no) Norwegian.
- (pt) Portuguese.
- (sf) Swiss French.
- (sg) Swiss German.
- (sv) Swedish with “dead accents”.
- (uk) British.
- (us) English/US keyboard mapping.
The KB_SV mapping can be used in the KB_NODEAD (.nodead) variant. This switches
off the “dead accents”.
To set a German keyboard layout, use wsconsctl
. To set it at kernel build time, add the following to
the kernel configuration file for a type 4 keyboard:
For a type 5 keyboard:
driver first appeared in
. Support for the TIOCM*
s appeared in
driver now supports cua minor devices, but
with this known deficiency in the simultaneous outgoing/incoming aspect of the
driver: The first outgoing connection succeeds, but second and subsequent
connections fail, apparently due to a getty hang. The hung getty apparently
prevents the cua device from being re-opened.
The kernel does not provide a keyboard layout for all manufactured Sun keyboard