$NetBSD: README,v 1.2 1994/10/26 09:08:31 cgd Exp $
NetBSD/sun3 supports the following busses:
Bus:
obio - Devices on the motherboard, accessed by having their "registers"
mapped into the kernel's virtual address space
obctl - Devices on the motherboard accessible only via the 'CONTROL' space,
and supporting instructions on the m68k.
obmem - Devices on the motherboard that are mapped into main memory
by the hardware. Only true of some framebuffers.
mainbus - An imaginary bus on which obio, obctl, obmem, and the prom device
all reside.
Devices supported:
'obio' Bus:
Device Type Description
---------------------------------------------------------------------------
zs CHAR zilog 8530 serial ports; used for serial ports, keybd, mouse
le IFNET lance ethernet driver
'obctl' Bus:
Device Type Description
---------------------------------------------------------------------------
idprom CHAR makes idprom contents accessible in user-space
The 'prom' device is just wierd as it isn't a real device, but enough
wrapping so that the prom input/output routines can be used to make
the prom's idea of the console both a tty, and a console in the netbsd
sense.
prom CHAR prom-based tty and console support
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