Short: Speed up datatypes on WB emulations Author: Stefan Boberg Uploader: boberg lysator liu se Type: util/sys Architecture: m68k-amigaos ======================================== PatchDT Copyright (c) 1993 by Stefan Boberg Freely Distributable Software ======================================== DESCRIPTION PatchDT is a program that patches a few functions in the datatypes library in order to speed up the Workbench screen update when using datatypes objects as backdrops in the workbench windows. This is only useful with graphics cards such as the Piccolo or GVP Spectrum; you will see no speedup when using the native Amiga graphics. PERFORMANCE When using the patch on a Piccolo graphics board in Zorro-II mode, workbench windows open and close approximately four times as quick as an unpatched workbench. In Zorro-III mode it is even faster. Here's a rough comparison of timings with and without PatchDT: Screen: 1024*768, 256 colors, opening a full-screen empty drawer window containing a 256-colour backdrop over a 256-colour workbench backdrop. +--------+---------+ |Original| PatchDT | +-----+--------+---------+ |Z2 | 2.0 s | 0.5 s | |Z3 | 1.8 s | 0.4 s | +-----+--------+---------+ Timings are for an A4000/040. Depending on your screen mode and host system, you may get different results. WHAT CARDS DOES IT WORK ON? All graphics cards using the EGS WBEmu software. Among these are the Piccolo, and the GVP EGS Spectrum. This has not been tested on the Picasso II board, but if the Picasso emulation software is well-written, it should work there as well. SYSTEM REQUIREMENTS CPU: 68020 or higher. OS: Kickstart 3.0 or later USAGE Put the line: run >nil: