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committedApr 9, 2023
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‎.gitignore

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*~
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NMOS-II.sla
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*.pdf
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core.*

‎LICENSE

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Apache License
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Version 2.0, January 2004
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‎NMOS-II/Module.manifest

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‎NMOS-II/certification.manifest

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##VERSION: 2.0
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Module.manifest||GHIDRA||||END|
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data/languages/NMOS-II.cspec||GHIDRA||||END|
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data/languages/NMOS-II.ldefs||GHIDRA||||END|
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data/languages/NMOS-II.pspec||GHIDRA||||END|
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data/languages/NMOS-II.slaspec||GHIDRA||||END|
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data/manuals/NMOS-II.idx||GHIDRA||||END|

‎NMOS-II/data/languages/NMOS-II.cspec

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<?xml version="1.0" encoding="UTF-8"?>
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<compiler_spec>
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<data_organization>
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<absolute_max_alignment value="0" />
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<machine_alignment value="2" />
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<default_alignment value="1" />
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<default_pointer_alignment value="4" />
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<pointer_size value="2" />
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<wchar_size value="2" />
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<short_size value="2" />
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<integer_size value="2" />
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<long_size value="2" />
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<long_long_size value="4" />
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<float_size value="2" />
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<double_size value="4" />
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<long_double_size value="8" />
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<size_alignment_map>
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<entry size="1" alignment="1" />
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<entry size="2" alignment="2" />
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<entry size="4" alignment="4" />
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<entry size="8" alignment="8" />
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</size_alignment_map>
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</data_organization>
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<global>
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<range space="ram"/>
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</global>
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<stackpointer register="R" space="ram"/>
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<default_proto>
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<prototype name="__stdcall" extrapop="2" stackshift="2">
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<input>
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<pentry minsize="1" maxsize="500" align="2">
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<addr offset="2" space="stack"/>
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</pentry>
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</input>
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<output>
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<pentry minsize="1" maxsize="2">
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<register name="A"/>
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</pentry>
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</output>
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</prototype>
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</default_proto>
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</compiler_spec>

‎NMOS-II/data/languages/NMOS-II.ldefs

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<?xml version="1.0" encoding="UTF-8"?>
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<language_definitions>
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<language processor="NMOS-II"
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endian="big"
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size="16"
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variant="default"
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version="1.0"
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slafile="NMOS-II.sla"
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processorspec="NMOS-II.pspec"
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manualindexfile="../manuals/NMOS-II.idx"
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id="NMOS-II:LE:16:default">
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<description>HP NMOS-II</description>
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<compiler name="default" spec="NMOS-II.cspec" id="default"/>
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</language>
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</language_definitions>

‎NMOS-II/data/languages/NMOS-II.pspec

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<?xml version="1.0" encoding="UTF-8"?>
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<processor_spec>
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<programcounter register="PC"/>
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</processor_spec>

‎NMOS-II/data/languages/NMOS-II.slaspec

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# sleigh specification file for HP NMOS-II
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#
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# Copyright (c) 2023 by Klaus Kämpf <kkaempf@gmail.com>
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#
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# Licensed under the Apache 2.0 license
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#
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#--------------------------------------------------------------------------
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# Spaces
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define endian=big;
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define alignment=1;
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define space ram type=ram_space size=2 wordsize=1 default;
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define space register type=register_space size=2;
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#--------------------------------------------------------------------------
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# Registers
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#0 2 4 6 8 a c e 10 12 14 16 18 1a 1c 1e 20 22 24
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define register offset=0x0 size=2 [ A B P R R4 R5 R6 R7 IV PA W DMAPA DMAMA DMAC C D AR2 SE X ];
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define register offset=0x30 size=2 [ loc ];
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# condition flags
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define register offset=0x50 size=1 [ DC_F HLT_F FLG_F STS_F ];
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#--------------------------------------------------------------------------
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# Macros
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#--------------------------------------------------------------------------
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# Tokens
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# -- memory reference
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define token memref(16)
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di = (15,15) # direct / indirect
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group = (12,14) # instruction group
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opcode = (11,14) # instruction
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page = (10,10) # base / current page
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addr = (0,9) # address
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;
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# -- shift / rotate
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define token shift(16)
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op_shift = (4,15)
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count = (0,3)
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;
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# -- skip
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# -- return
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# -- complement
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# -- alter
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# -- execute
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# -- 16-bit IOC only
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# -- stack
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# -- interrupt
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# -- dma
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# -- four word operation
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# -- mantissa shift
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# -- arithmetic
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#--------------------------------------------------------------------------
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# Variables
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#--------------------------------------------------------------------------
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# Tables
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#--------------------------------------------------------------------------
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# Mnemonics
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:LDA is opcode=0 { }
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:LDB is opcode=1 { }
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:CPA is opcode=2 { }
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:CPB is opcode=3 { }
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:ADA is opcode=4 { }
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:ADB is opcode=5 { }
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:STA is opcode=6 { }
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:STB is opcode=7 { }
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:JSM is opcode=8 { }
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:ISZ is opcode=9 { }
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:AND is opcode=10 { }
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:DSZ is opcode=11 { }
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:IOR is opcode=12 { }
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:JMP is opcode=13 { }
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‎NMOS-II/data/manuals/NMOS-II.idx

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#
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# bitsavers.org pdf/hp/asic/nmos-II
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@NMOS-II_RefManual_Aug1976.pdf [Reference Manual for the CPD N-MOS II Processor August 1976]

‎README.md

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# NMOS-II processor description for Ghidra
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This implements the Hewlett Packard (HP) NMOS-II processor for
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[Ghidra](https://ghidra-sre.org)
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NMOS-II was used in early HP computers and plotters, e.g. the 9872C/T
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plotter.

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