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-- $Id: pdp11_core_rbus.vhd 427 2011-11-19 21:04:11Z mueller $
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-- $Id: pdp11_core_rbus.vhd 553 2014-03-17 06:40:08Z mueller $
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--
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--
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-- Copyright 2007-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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-- Copyright 2007-2014 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 2, or at your option any later version.
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-- Software Foundation, either version 2, or at your option any later version.
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--
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--
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-- 1 cmdmerr r/-/- cp_stat: cmdmerr
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-- 1 cmdmerr r/-/- cp_stat: cmdmerr
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-- 0 cmderr r/-/- cp_stat: cmderr
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-- 0 cmderr r/-/- cp_stat: cmderr
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-- bbb00011 psw r/w/- processor status word access
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-- bbb00011 psw r/w/- processor status word access
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-- bbb00100 al r/w/- address register, low
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-- bbb00100 al r/w/- address register, low
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-- bbb00101 ah r/w/- address register, high
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-- bbb00101 ah r/w/- address register, high
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-- 7 ubm r/w/- ubmap access
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-- 6 p22 r/w/- 22bit access
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-- 5: 0 addr r/w/- addr(21:16)
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-- bbb00110 mem r/w/- memory access
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-- bbb00110 mem r/w/- memory access
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-- bbb00111 memi r/w/- memory access, inc address
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-- bbb00111 memi r/w/- memory access, inc address
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-- bbb01rrr gpr[] r/w/- general purpose regs
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-- bbb01rrr gpr[] r/w/- general purpose regs
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-- bbb10000 ibrb r/w/- ibr base address
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-- bbb10000 ibrb r/w/- ibr base address
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-- 12:06 base r/w/- ibr window base address
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-- 12:06 base r/w/- ibr window base address
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