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58 lines
2.0 KiB
Plaintext
58 lines
2.0 KiB
Plaintext
/*
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* MUUO.txt
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* Copyright (C) 2013-2015 Mikael Pettersson
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*
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* This file is part of pdp10-tools.
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*
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* pdp10-tools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* pdp10-tools is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with pdp10-tools. If not, see <http://www.gnu.org/licenses/>.
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*/
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.text
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.globl start
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/*
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* 000: always invalid
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*
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* LUUOs:
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* 001-037
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*
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* MUUOs:
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* TOPS-20: 104(JSYS); 040-051 and 055-077 in section 0
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* TOPS-10 except KA10: 040-051, 055-077
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* KA10: 040-051, 055-100
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* KC10/KD10: 040-101, 104(JSYS), 130, 131, 141, 151, 161, 171, 247
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* XKL-1: 040-101, 104(JSYS), 247
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*
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* Unassigned codes are not MUUOs, but the processor reacts to them in the same way.
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*
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* 042-046 are reserved MUUOs.
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* 052-054, 101 are unassigned on <= KL10, MUUOs on KC10/KD10/XKL-1.
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*
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* The kernel-mode target of a MUUO is a function of the context in which the MUUO
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* was executed (or the overflow trap occurred), but the opcode of the MUUO is not
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* a parameter of that function. (<= KL10, XKL-1).
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*
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* KA10: 247 and 257 are unassigned but act as NOPs not MUUOs unless special hardware is present.
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*
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* KC10: MUUOs are first classified into one of six classes (VM traps, unassigned user-mode
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* opcodes, unassigned I/O opcodes, unassigned EXTEND opcodes, JSYS, other MUUOs), then
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* dispatched via a six-entry vector.
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*
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* KD10: Like KC10, except the VM traps case does not exist.
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*/
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start:
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.word 0201040000000 /* MOVEI 1,0 ; exit status 0 */
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.word 0104000000136 /* JSYS 0136 ; __NR_exit_group */
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.word 0254200000000 /* HALT */
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