Short: MuLib based ROM Replacement Hack Author: thorfdbg@alumni.tu-berlin.de (Thomas Richter) Uploader: thorfdbg alumni tu-berlin de (Thomas Richter) Type: util/boot Version: 46.6 Requires: util/libs/MMULib.lha, 2MB chip, well-behaived board Architecture: m68k-amigaos >= 2.0.4 ______________________________________________________________________________ Changes made for 46.6: Many. The whole resident MMU-setup was turned upside down, mostly to make it more compatible. MuMapRom has been successfully tested on additional systems with the modifications in place. Note that you may still need lots of chip mem in worst case. Changes made for 40.4: The reset-and-stay resident mechanism of MuMapRom makes now use of the ColdCapture exec vector and a nice little extra hack. Adds now a 16MB "safety zone" around memory areas to keep some wierd memory tests working. Did not work at all if the "ROMINFAST" option was not present at the command line. Should be much better now. ______________________________________________________________________________ MuMapRom is a mmu.library based "ROM kicker", i.e. it replaces the ROM resident kickstart by a disk based image file. The purpose of MuMapRom is mainly to replace the kickstart image temporarely for testing, e.g. for program authors to test their programs under different environments. It should not be used for permanent kickstart replacement. ______________________________________________________________________________ Top reasons why not to use this program: - It is a hack. MuMapRom assumes several non-granted behaivours of the current Kickstart implementation, of the CPU and motherboard hardware. - MuMapRom will not work in all available environments. It may cause some compatibility problems, depending on the board type, the hardware and the memory configuration. - MuMapRom requires a lot of chip memory (See "Implementation" for details why this is so). In fact, it will only run on machines with 2MB chip memory. A graphic card is recommended as otherwise not much chip memory is left. If you need a new/different ROM for your system, you should rather: - Buy the ROM chip and install it. This will definitely work, will be most robust and won't cause any problem. If you need two different ROM versions, hardware solutions are available that allow switching between two ROMs. - If you just need an upgrade of several system modules, other less hacky solutions exist. For example, to replace one ROM module by a ROM module of a later edition, you are encouraged to use the "LoadModule" and "MuProtectModules" of the same author. - If you need short turn-around times for software testing, try to find a solution that is adapted to your board hardware (e.g. CyberMap). These programs do not need to touch the MMU, but rather use board specific hardware for ROM remapping. This will typically do better since it will not require as much chip memory as this program. If you still think that you "need" MuMapRom, please read the "MuMapRom.guide" file first. Experts might want to read the "Implementation" chapter of the guide as well as it contains background information where the MuMapRom restrictions arise from. ______________________________________________________________________________ The THOR-Software Licence (v2, 24th June 1998) This License applies to the computer programs known as "mmu.library", "MuMapRom", "MuFastRom" and the corresponding documentation, known as ".readme" files. The "Program", below, refers to such program. The "Archive" refers to the package of distribution, as prepared by the author of the Program, Thomas Richter. Each licensee is addressed as "you". The Program and the data in the archive are freely distributable under the restrictions stated below, but are also Copyright (c) Thomas Richter. Distribution of the Program, the Archive and the data in the Archive by a commercial organization without written permission from the author to any third party is prohibited if any payment is made in connection with such distribution, whether directly (as in payment for a copy of the Program) or indirectly (as in payment for some service related to the Program, or payment for some product or service that includes a copy of the Program "without charge"; these are only examples, and not an exhaustive enumeration of prohibited activities). However, the following methods of distribution involving payment shall not in and of themselves be a violation of this restriction: (i) Posting the Program on a public access information storage and retrieval service for which a fee is received for retrieving information (such as an on-line service), provided that the fee is not content-dependent (i.e., the fee would be the same for retrieving the same volume of information consisting of random data). (ii) Distributing the Program on a CD-ROM, provided that a) the Archive is reproduced entirely and verbatim on such CD-ROM, including especially this licence agreement; b) the CD-ROM is made available to the public for a nominal fee only, c) a copy of the CD is made available to the author for free except for shipment costs, and d) provided further that all information on such CD-ROM is re-distributable for non-commercial purposes without charge. Redistribution of a modified version of the Archive, the Program or the contents of the Archive is prohibited in any way, by any organization, regardless whether commercial or non-commercial. Everything must be kept together, in original and unmodified form. Limitations. THE PROGRAM IS PROVIDED TO YOU "AS IS", WITHOUT WARRANTY. THERE IS NO WARRANTY FOR THE PROGRAM, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. IF YOU DO NOT ACCEPT THIS LICENCE, YOU MUST DELETE THE PROGRAM, THE ARCHIVE AND ALL DATA OF THIS ARCHIVE FROM YOUR STORAGE SYSTEM. YOU ACCEPT THIS LICENCE BY USING OR REDISTRIBUTING THE PROGRAM. Thomas Richter ______________________________________________________________________________ Happy ROM Kicking, Thomas Richter (November 2016)