1994-10-26 12:07:55 +03:00
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$NetBSD: README,v 1.2 1994/10/26 09:08:31 cgd Exp $
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1993-08-16 03:01:58 +04:00
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NetBSD/sun3 supports the following busses:
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Bus:
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obio - Devices on the motherboard, accessed by having their "registers"
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mapped into the kernel's virtual address space
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obctl - Devices on the motherboard accessible only via the 'CONTROL' space,
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and supporting instructions on the m68k.
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obmem - Devices on the motherboard that are mapped into main memory
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by the hardware. Only true of some framebuffers.
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mainbus - An imaginary bus on which obio, obctl, obmem, and the prom device
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all reside.
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Devices supported:
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'obio' Bus:
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Device Type Description
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---------------------------------------------------------------------------
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zs CHAR zilog 8530 serial ports; used for serial ports, keybd, mouse
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le IFNET lance ethernet driver
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'obctl' Bus:
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Device Type Description
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---------------------------------------------------------------------------
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idprom CHAR makes idprom contents accessible in user-space
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The 'prom' device is just wierd as it isn't a real device, but enough
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wrapping so that the prom input/output routines can be used to make
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the prom's idea of the console both a tty, and a console in the netbsd
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sense.
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prom CHAR prom-based tty and console support
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