If Carlsberg made operating systems.... https://www.george3.co.uk/ 2026-04-06T22:54:02+00:00 https://www.george3.co.uk/ https://www.george3.co.uk/_media/wiki/dokuwiki.svg text/html 2025-10-03T20:18:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter1?rev=1759522708&do=diff 1. INTRODUCTION TO GIN 1.0 The Purpose and Nature of GIN GIN is a language for compiling assembly-level programs for the ICL 1900 Series. It shares its instruction set to a large extent with PLAN, but the various directives which control its operation have only enough in common with those of PLAN to make disaster almost certain if they are confused. text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter2?rev=1705492539&do=diff 2 GIN INPUT AND OUTPUT 2.0 GIN's use of peripherals GIN can use the following peripherals: Input (Section 2.1): * Card readers * Tape readers * Magnetic tapes. Output (Section 2.2): * Magnetic tapes. Backing store (Section 2.3): * Drum * Discs under UDAS text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter3?rev=1705492539&do=diff 3 THE SOURCE PROGRAM 3.0 Source formats This section of the manual describes in greater detail the source which GIN will accept. The compiler is regulated by directives and thereby obtains the definitions of a number of identifiers and macros. The identifiers can be combined with other numerical terms to form text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter4?rev=1705492539&do=diff 4 HANDLING THE OBJECT PROGRAM 4.0 The Object Program This Section describes the way in which the object program being compiled is stored by GIN, and how it can be put onto magnetic tape or entered for execution. GIN does not provide any facilities for dumping programs to cards or paper tape. The user who wants a dump in this form can either write his own interlude, copy the one given in Section 10.6.2, or take the output from GIN and use the facilities of other software to produce it; … text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter5?rev=1705492539&do=diff 5 MACROS 5.0 The Macro Facility The macro facility in GIN can prove confusing to the newcomer, since it has a superficial similarity to the macro facility in PLAN which conceals a considerable difference in the usefulness of the two kinds of macro. text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter6?rev=1705492539&do=diff 6 TALKING TO THE COMPILER 6.0 Interludes and User-Compiler Communication GIN provides extensive facilities for the user to obtain information from the compiler and to make it do something other than what it would normally do. Thereare two main facilities, interludes and compiler variables. text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/chapter7?rev=1705492539&do=diff 7 STEERING GIN 7.0 Loading the Compiler The compiler of GIN is itself written in GIN, and so the magnetic tape dumps which are available are in the format produced by GIN. As a general rule GIN is published as a magnetic tape subfile called GIN5 or a similar appropriate name, in the format produced by #BIP. FINDable dumps can be supplied on special request. GIN is not overlaid. text/html 2024-01-17T12:47:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/contents?rev=1705495632&do=diff GIN Reference Manual Table of Contents Part I * 1. INTRODUCTION TO GIN * 2 GIN INPUT AND OUTPUT * 3 THE SOURCE PROGRAM * 4 HANDLING THE OBJECT PROGRAM * 5 MACROS * 6 TALKING TO THE COMPILER * 7 STEERING GIN * Overlays and Segments PART II Still under construction text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/segments?rev=1705492539&do=diff Overlays and Segments Source lines in GIN are divided into three classes: * Lines which give rise to stored words. * Lines which only affect the operation of the compiler: these consist of directives, labels and lines in macro definitions. * Lines which give rise to other source lines: these are macro call lines. text/html 2024-01-17T11:55:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.george3.co.uk/gin/sidebar?rev=1705492539&do=diff Quick Links Home GRM GIN Macros Universal Identifiers George Overlays George Chapters George Source