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| 1 : | anton | 1.1 | \ VARS.FS Kernal variables |
| 2 : | |||
| 3 : | anton | 1.6 | \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
| 4 : | anton | 1.1 | |
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ of the License, or (at your option) any later version. | ||
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | hex \ everything now hex! 11may93jaw | ||
| 22 : | |||
| 23 : | \ important constants 17dec92py | ||
| 24 : | |||
| 25 : | \ dpANS6 (sect 3.1.3.1) says | ||
| 26 : | \ "a true flag ... [is] a single-cell value with all bits set" | ||
| 27 : | \ better definition: 0 0= constant true ( no dependence on 2's compl) | ||
| 28 : | crook | 1.10 | -1 Constant true ( -- f ) \ core-ext |
| 29 : | \G CONSTANT: f is a cell with all bits set. | ||
| 30 : | \ see starts looking for primitives after this word! | ||
| 31 : | |||
| 32 : | 0 Constant false ( -- f ) \ core-ext | ||
| 33 : | \G CONSTANT: f is a cell with all bits clear. | ||
| 34 : | anton | 1.1 | |
| 35 : | 1 cells Constant cell ( -- u ) \ gforth | ||
| 36 : | 1 floats Constant float ( -- u ) \ gforth | ||
| 37 : | |||
| 38 : | crook | 1.10 | 20 Constant bl ( -- c-char ) \ core |
| 39 : | \G c-char is the character value for a space. | ||
| 40 : | \ used by docon:, must be constant | ||
| 41 : | anton | 1.1 | |
| 42 : | FF Constant /line | ||
| 43 : | |||
| 44 : | 40 Constant c/l | ||
| 45 : | 10 Constant l/s | ||
| 46 : | 400 Constant chars/block | ||
| 47 : | |||
| 48 : | anton | 1.2 | $20 8 2* cells + 2 + cell+ constant word-pno-size ( -- u ) |
| 49 : | 84 constant pad-minsize ( -- u ) | ||
| 50 : | |||
| 51 : | anton | 1.1 | \ that's enough so long |
| 52 : | |||
| 53 : | \ User variables 13feb93py | ||
| 54 : | |||
| 55 : | \ initialized by COLD | ||
| 56 : | |||
| 57 : | pazsan | 1.7 | Create main-task has? OS [IF] 100 [ELSE] 40 [THEN] cells allot |
| 58 : | jwilke | 1.3 | |
| 59 : | \ set user-pointer from cross-compiler right | ||
| 60 : | main-task | ||
| 61 : | UNLOCK tup ! LOCK | ||
| 62 : | anton | 1.1 | |
| 63 : | anton | 1.8 | Variable udp \ user area size? -anton |
| 64 : | anton | 1.1 | |
| 65 : | AUser next-task main-task next-task ! | ||
| 66 : | AUser prev-task main-task prev-task ! | ||
| 67 : | AUser save-task 0 save-task ! | ||
| 68 : | crook | 1.10 | AUser sp0 ( -- a-addr ) \ gforth |
| 69 : | \G USER VARIABLE: Initial value of the data stack pointer. | ||
| 70 : | \ sp0 is used by douser:, must be user | ||
| 71 : | ' sp0 Alias s0 ( -- a-addr ) \ gforth | ||
| 72 : | \G OBSOLETE alias of @code{sp0} | ||
| 73 : | |||
| 74 : | AUser rp0 ( -- a-addr ) \ gforth | ||
| 75 : | \G USER VARIABLE: Initial value of the return stack pointer. | ||
| 76 : | ' rp0 Alias r0 ( -- a-addr ) \ gforth | ||
| 77 : | \G OBSOLETE alias of @code{rp0} | ||
| 78 : | |||
| 79 : | AUser fp0 ( -- a-addr ) \ gforth | ||
| 80 : | \G USER VARIABLE: Initial value of the floating-point stack pointer. | ||
| 81 : | \ no f0, because this leads to unexpected results when using hex | ||
| 82 : | |||
| 83 : | AUser lp0 ( -- a-addr ) \ gforth | ||
| 84 : | \G USER VARIABLE: Initial value of the locals stack pointer. | ||
| 85 : | ' lp0 Alias l0 ( -- a-addr ) \ gforth | ||
| 86 : | \G OBSOLETE alias of @code{lp0} | ||
| 87 : | |||
| 88 : | jwilke | 1.3 | AUser handler \ pointer to last throw frame |
| 89 : | anton | 1.9 | AUser backtrace-empty \ true if the next THROW should store a backtrace |
| 90 : | anton | 1.1 | \ AUser output |
| 91 : | \ AUser input | ||
| 92 : | |||
| 93 : | AUser errorhandler | ||
| 94 : | |||
| 95 : | AUser "error 0 "error ! | ||
| 96 : | |||
| 97 : | jwilke | 1.3 | [IFUNDEF] #tib \ in ec-Version we may define this ourself |
| 98 : | User tibstack \ saves >tib in execute | ||
| 99 : | User >tib \ pointer to terminal input buffer | ||
| 100 : | crook | 1.10 | User #tib ( -- a-addr ) \ core-ext |
| 101 : | \G USER VARIABLE: a-addr is the address of a cell containing | ||
| 102 : | \G the number of characters in the terminal input buffer. | ||
| 103 : | \G OBSOLESCENT: @code{source} superceeds the function of this word. | ||
| 104 : | |||
| 105 : | User >in ( -- a-addr ) \ core | ||
| 106 : | \G USER VARIABLE: a-addr is the address of a cell containing the | ||
| 107 : | \G char offset from the start of the terminal input buffer to the | ||
| 108 : | \G start of the parse area | ||
| 109 : | 0 >in ! \ char number currently processed in tib | ||
| 110 : | jwilke | 1.3 | [THEN] |
| 111 : | pazsan | 1.7 | has? file [IF] |
| 112 : | crook | 1.10 | User blk ( -- a-addr ) \ block |
| 113 : | \G USER VARIABLE: a-addr is the address of a cell containing zero | ||
| 114 : | \G (in which case the input source is not a block and can be identified | ||
| 115 : | \G by @code{source-id}) or the number of the block currently being | ||
| 116 : | \G interpreted. A Standard program should not alter @code{blk} directly. | ||
| 117 : | 0 blk ! | ||
| 118 : | |||
| 119 : | anton | 1.1 | User loadfile 0 loadfile ! |
| 120 : | |||
| 121 : | User loadfilename# 0 loadfilename# ! | ||
| 122 : | |||
| 123 : | User loadline \ number of the currently interpreted | ||
| 124 : | \ (in TIB) line if the interpretation | ||
| 125 : | \ is in a textfile | ||
| 126 : | \ the first line is 1 | ||
| 127 : | |||
| 128 : | 2User linestart \ starting file postition of | ||
| 129 : | \ the current interpreted line (in TIB) | ||
| 130 : | pazsan | 1.7 | [THEN] |
| 131 : | anton | 1.1 | |
| 132 : | crook | 1.10 | User base ( -- a-addr ) \ core |
| 133 : | \G USER VARIABLE: a-addr is the address of a cell that stores the | ||
| 134 : | \G number base used by default for number conversion during input and output. | ||
| 135 : | A base ! | ||
| 136 : | anton | 1.1 | User dpl -1 dpl ! |
| 137 : | |||
| 138 : | crook | 1.10 | User state ( -- a-addr ) \ core,tools-ext |
| 139 : | \G USER VARIABLE: a-addr is the address of a cell containing | ||
| 140 : | \G the compilation state flag. 0 => interpreting, -1 => compiling. | ||
| 141 : | \G A program shall not directly alter the value of @code{state}. The | ||
| 142 : | \G following Standard words alter the value in @code{state}: | ||
| 143 : | \G @code{:} (colon) @code{;} (semicolon) @code{abort} @code{quit} | ||
| 144 : | \G @code{:noname} @code{[} (left-bracket) @code{]} (right-bracket) | ||
| 145 : | \G @code{;code} | ||
| 146 : | 0 state ! | ||
| 147 : | |||
| 148 : | anton | 1.1 | AUser normal-dp \ the usual dictionary pointer |
| 149 : | AUser dpp normal-dp dpp ! | ||
| 150 : | \ the pointer to the current dictionary pointer | ||
| 151 : | \ ist reset to normal-dp on (doerror) | ||
| 152 : | \ (i.e. any throw caught by quit) | ||
| 153 : | AUser LastCFA | ||
| 154 : | AUser Last | ||
| 155 : | |||
| 156 : | pazsan | 1.7 | has? glocals [IF] |
| 157 : | anton | 1.1 | User locals-size \ this is the current size of the locals stack |
| 158 : | \ frame of the current word | ||
| 159 : | pazsan | 1.7 | [THEN] |
| 160 : | anton | 1.1 |
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