X-Git-Url: https://jxself.org/git/?p=linux-libre-firmware.git;a=blobdiff_plain;f=a56%2FREADME-1.2;fp=a56%2FREADME-1.2;h=0000000000000000000000000000000000000000;hp=682e4990f10af71eac5e2a016fc4fef6c4d4b79d;hb=2a4f7ac397e6e75eed514ab7f8206d8fde8059bc;hpb=0b0ac7b7b8a0a8d6ca55dfaf2e98efb9df096e00 diff --git a/a56/README-1.2 b/a56/README-1.2 deleted file mode 100644 index 682e499..0000000 --- a/a56/README-1.2 +++ /dev/null @@ -1,169 +0,0 @@ - - a56 - a DSP56001 assembler - version 1.2 - -/* - * Copyright (C) 1990-1994 Quinn C. Jensen - * - * Permission to use, copy, modify, distribute, and sell this software - * and its documentation for any purpose is hereby granted without fee, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear - * in supporting documentation. The author makes no representations - * about the suitability of this software for any purpose. It is - * provided "as is" without express or implied warranty. - * - */ - -V1.2 CHANGES - -Contributors to V1.2 - - - Andreas Gustafsson - - Added DS and DSM directives - - Generalization of the use of "*" allowing current program counter - to be used in any expression (including "org l:*" which is useful - for changing spaces without changing the PC) - - Noted a bug with MOVEP to a non-symbolic I/O address. I believe - this is now fixed. - - Noted that mispelled argumentless operators will be treated as - labels. For example, N0P (N-zero-P) will be treated as a label. - Unfortunately, my own use of a56 (i.e. using cpp as the macro - pre-processor) complicates this. However, the grammar might - have been simpler if the lexical analyzer was able to distinguish - between label declarations and references instead of leaving that - up to the YACC parser. - - Tim Channon and Peter Breuer - - - Missing ";" in grammar! - - Rober Ganter - - Fixed bad comment on line 10 of a56.y - - Me - - Listing now includes psect usage summary - - Better checking of movec arguments - - Added int(value) function to convert floating point constant expression - to integer (by truncation) - - Correctly convert a floating -1.0 to 0x800000 - - Wrote a new lexical analyzer and lexical parser generator - - Many other minor enhancements and fixes. - - Ported to DOS using DJ Delories' GCC port. (Tools available at - ftp://omnigate.clarkson.edu/pub/msdos/djgpp) - -Known bugs/deficiencies: - - - MOVE to a control reg generates bogus code (always use MOVEC, - MOVEM, and MOVEP) - -The example code this time around includes a full six-comb stereo reverb -(based on Moorer). This one sounds a lot better than the four-comb algorithm. -Each comb uses a one-pole low-pass filter in the loop. It lacks the -early-reflection FIR (although Motorola's rvb2.asm has it) but has -true stereo decorrelation by using a twin allpass stage. My old reverb -just used inversion to simulate stereo (the whole reverb effect would -disappear if you mixed the outputs). I've included only actual reverb -code itself. It lacks the hardware-implementation-specific shell. - - ---------------------------------------------------------------------------- - -OVERVIEW - -This program was written as a vehicle to learn the intricacies -of the DSP56001 instruction set, and to provide a tool for Unix-based -DSP code development (for those of us without a NeXT machine.) - -The intent was to provide compatibility with Motorola assembler's syntax. -But since the author did not have Motorola's assembler or its documentation, -it is no doubt far from compatible. Only a few pseudo-ops are implemented-- -probably only partially. - -Macros are not supported, except through the use of an external macro -preprocessor, such as /lib/cpp. To facilitate cpp macro expansion, multiple -assembler statements on a single input line are delimited with an '@', e.g.: - - #define JCHEQ(c,label) move #c,x0 @cmp x0,a @jeq label - - #define JCHNE(c,label) move #c,x0 @cmp x0,a @jne label - - -SUPPORTED PSEUDO-OPS - -The following is a list of the pseudo-ops that are recognized: - - = ;assign a symbol -