From tweeks@texas.net Received: from texas.net (dnet02-09.sat.texas.net [206.127.4.39]) by mail1.texas.net (8.8.5/8.8.5) with SMTP id AAA09409 for ; Tue, 11 Nov 1997 00:31:06 -0600 (CST) From: Thomas Weeks To: Thomas Weeks Date: Mon, 10 Nov 1997 01:20:36 +0500 Message-ID: X-Mailer: YAM 1.3.4 [020] - Amiga Mailer by Marcel Beck Subject: Re: A quick A500 question if you don't mind (fwd) MIME-Version: 1.0 Content-Type: text/plain X-UIDL: 6f1496cc4ed1cc10b0b6ae4f6d5a71ac *** Forwarded message, originally written by Thomas Weeks on 10-Nov-97 *** Around 10-Nov-97, Randy Cornetta typed: >Tom, > I would like to know what those jumper do next to the Agnus >on a REV5a A500 motherboard. I know they control the Agnus >but I would like to know what each jumper does. Well.. they are labled inthe schematics in the back of the A500 manual... but if you do not HAVE a manual.. there: Sounds like you have a REV6x mobo... JP2 toggels Addressline A19 which allows your (1M) agnus to access the address space from 512k-1M as chip RAM. The _EX_RAM line (jumper in your case...) JP7A needs to be removed. JP4 (if removed) will put the Agnus is PAL mode when the machine is rebooted.. the JP5 stuff is address, and clock stuff, that unless you know what you want to hack them for, are better left alone. >Thank you, >Randy Cornetta Hope this quenched your hacker thirst... Or wet it... hehe ;v) Tom D Tek -- __________________________________________________________________________ / Thomas W. Weeks |Team AMIGA Commodore Amiga 500/030 40MHz \ | A&M EET/Telecom Grad '95 | /// Hacked Into Black Tower Case, | | Authorized Amiga Tech (7yrs) | __ /// 9M RAM, SyQuest 44M, 700M-o-SCSI | | Contact Me @ | \\\/// IBM 286 Hardware Emulator, | | o------------o | \XX/ Home Brew Audio A/D, HP48GX | | Email: tweeks@texas.net |"Amiga, The Computer for the Creative Mind"TM| |Web:lonestar.texas.net/~tweeks|"Mac, The Computer for the Rest of Us"TM | \_____________________________|____________________________________________/ -- __________________________________________________________________________ / Thomas W. Weeks |Team AMIGA Commodore Amiga 500/030 40MHz \ | A&M EET/Telecom Grad '95 | /// Hacked Into Black Tower Case, | | Authorized Amiga Tech (7yrs) | __ /// 9M RAM, SyQuest 44M, 700M-o-SCSI | | Contact Me @ | \\\/// IBM 286 Hardware Emulator, | | o------------o | \XX/ Home Brew Audio A/D, HP48GX | | Email: tweeks@texas.net |"Amiga, The Computer for the Creative Mind"TM| |Web:lonestar.texas.net/~tweeks|"Mac, The Computer for the Rest of Us"TM | \_____________________________|____________________________________________/