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README revision 1.1 
      1 							<$Revision: 1.1 $>
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      3 NetBSD/sun3 supports the following busses:
      4 
      5 Bus:
      6 obio	-  Devices on the motherboard, accessed by having their "registers"
      7 	   mapped into the kernel's virtual address space
      8 obctl	-  Devices on the motherboard accessible only via the 'CONTROL' space,
      9 	   and supporting instructions on the m68k.
     10 obmem	-  Devices on the motherboard that are mapped into main memory
     11 	   by the hardware.  Only true of some framebuffers.
     12 mainbus -  An imaginary bus on which obio, obctl, obmem, and the prom device
     13 	   all reside.
     14 
     15 Devices supported:
     16 
     17 'obio' Bus: 
     18 Device	Type    Description
     19 ---------------------------------------------------------------------------
     20 zs	CHAR	zilog 8530 serial ports; used for serial ports, keybd, mouse
     21 le	IFNET	lance ethernet driver
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     23 'obctl' Bus: 
     24 Device	Type    Description
     25 ---------------------------------------------------------------------------
     26 idprom	CHAR	makes idprom contents accessible in user-space
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     28 
     29 The 'prom' device is just wierd as it isn't a real device, but enough
     30 wrapping so that the prom input/output routines can be used to make
     31 the prom's idea of the console both a tty, and a console in the netbsd
     32 sense.
     33 
     34 prom	CHAR	prom-based tty and console support
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