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diff --git a/share/doc/papers/px/pxin0.n b/share/doc/papers/px/pxin0.n deleted file mode 100644 index ba020f3..0000000 --- a/share/doc/papers/px/pxin0.n +++ /dev/null @@ -1,140 +0,0 @@ -.\" Copyright (c) 1979 The Regents of the University of California. -.\" All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. All advertising materials mentioning features or use of this software -.\" must display the following acknowledgement: -.\" This product includes software developed by the University of -.\" California, Berkeley and its contributors. -.\" 4. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)pxin0.n 5.2 (Berkeley) 4/17/91 -.\" $FreeBSD$ -.\" -.RP -.TL -Berkeley Pascal -PX Implementation Notes -.br -Version 2.0 \- January, 1979 -.AU -William N. Joy\*(Dg -.AU -M. Kirk McKusick\*(Dd -.AI -Computer Science Division -Department of Electrical Engineering and Computer Science -University of California, Berkeley -Berkeley, California 94720 -.AB -.PP -Berkeley Pascal -is designed for interactive instructional use and runs on the -.SM "VAX 11/780" . -The interpreter -.I px -executes the Pascal binaries generated by the Pascal translator -.I pi . -.PP -The -.I -PX Implementation Notes -.R -describe the general organization of -.I px , -detail the various operations of the interpreter, -and describe the file input/output structure. -Conclusions are given on the viability of an interpreter -based approach to language implementation for an instructional environment. -.AE -.if n 'ND -.SH -Introduction -.PP -These -.I -PX Implementation Notes -.R -have been updated from the original -.SM "PDP 11/70" -implementation notes to reflect the interpreter that runs on the -.SM "VAX 11/780" . -These notes consist of four major parts. -The first part outlines the general organization of -.I px . -Section 2 describes the operations (instructions) of the interpreter -while section 3 focuses on input/output related activity. -A final section gives conclusions about the viability of an interpreter -based approach to language implementation for instruction. -.SH -Related Berkeley Pascal documents -.PP -The -.I "PXP Implementation Notes" -give details of the internals of the execution profiler -.I pxp; -parts of the interpreter related to -.I pxp -are discussed in section 2.10. -A paper describing the syntactic error recovery mechanism used in -.I pi -was presented at the ACM Conference on Compiler Construction -in Boulder Colorado in August, 1979. -.SH -Acknowledgements -.PP -This version of -.I px -is a -.SM "PDP 11/70" -to -.SM "VAX 11/780" -opcode mapping of the original -.I px -that was designed and implemented by Ken Thompson, -with extensive modifications and additions -by William Joy -and Charles Haley. -Without their work, this -.UP -system would never have existed. -These notes were first written by William Joy for the -.SM "PDP 11/70" -implementation. -We would also like to thank our faculty advisor Susan L. Graham -for her encouragement, -her helpful comments and suggestions -relating to -.UP -and her excellent editorial assistance. -.FS -\*(dg\ The financial support of the National Science Foundation under grants -MCS74-07644-A03 and MCS78-07291 -and of an \s-2IBM\s0 Graduate Fellowship are gratefully acknowledged. -.FE -.FS -\*(dd\ The financial support of a Howard Hughes Graduate -Fellowship is gratefully acknowledged. -.FE -.bp |