Short: Direct A500/2000/1200 clock chip access Author: simon@studio.woden.com (Simon N Goodwin) Uploader: simon studio woden com (Simon N Goodwin) Type: dev/misc Version: 1.0 Architecture: m68k-amigaos The programs in this archive demonstrate direct access to the hardware clock on the majority of Amigas. They are examples of 'banging the metal', inadvisable unless you know the configuration of the target system, but they are potentially useful if you need access to the clock when running another OS (e.g. Qdos, NetBSD or Linux) or while AmigaOS is turned off. The accompanying text file discusses the chips used in many versions of the Amiga and expansion boards and access to facilities of the clock chip not available to AmigaOS. The programs were tested on both 6 Mb 68020 and Apollo 68060 A1200 systems, and require small alterations, explained in the text, to suit 16 bit systems like the A2000 or A500. They have also been tested on an A500+ and A500 with Commodore and third-party trapdoor expansions. The programs do not work on an A3000 or A4000 because those machines use a different type of Real Time Clock chip. Sorry! The files were originally written for part 12 of the Amiga Format series Banging The Metal (AF133, February 2000) and are released on Aminet by permission of the author, with the agreement of the initial publishers Futurenet. Several other examples from this series are already available on Aminet, including the following: dev/basic OnlineTimer.lha Serial port Carrier Detection timer util/moni CopperDecode.lha Copper List disassembler util/wb DMAmon.lha Monitors floppy and sound activity