wilko@idca.tds.PHILIPS.nl (W.C. Bulte) (03/20/91)
I am experiencing some problems in upgrading a Mega 1 to a Mega 2.5. I did replace bank 1 consisting of 4 x 414256 (256Kx4 chips) by 16 x 411000 (1Mx1). The missing A9 line (not used on the 414256) is connected to the 411000 via a series R of 33 ohm. Result of all this: the ST recognizes the new bank 1 as a 128k bank, giving me a total of 640 kbytes. In addition a very interesting moving pattern of vertical bars appears on the screen. The bars are approximately 8 pixels wide. I get the impression that this screen pattern is due to non-refreshed dram locations. Apparantly the ST thinks (?) that 64 k drams are used for bank 1, resulting in a refresh cycle on 8 address lines (256 address refresh cycle) instead of the 9 address and 512 refresh cycle a 1Mbit memory cell requires. My question: does Atari use a different MMU chip in the Mega 1 with 414256 chips which cannot handle the 1Mbit cells? This would mean I am stuck with 1Mbyte. I'd love to see Spectre running with some more memory and Multifinder. Any help appreciated _ ______________________________________________________________________ | / o / / _ Wilko Bulte Domain: wilko@idca.tds.philips.nl |/|/ / / /( (_) uucp : [mcsun,hp4nl]!philapd!wilko * Philips Information Systems Nederland phone: 055-432372 fax: 055-432103 ____________________________________________________________________________
chuckie@pro-odyssey.cts.com (Chuck Schul) (03/23/91)
In-Reply-To: message from wilko@idca.tds.PHILIPS.nl was there really a mega one st?also a 256 version of the st ever out?i hear these things but never heard of anyone having one? ---- ProLine: chuckie@pro-odyssey Internet: chuckie@pro-odyssey.cts.com UUCP: crash!pro-odyssey!chuckie ARPA: crash!pro-odyssey!chuckie@nosc.mil
neil@cs.hw.ac.uk (Neil Forsyth) (03/26/91)
In article <8153@crash.cts.com> chuckie@pro-odyssey.cts.com (Chuck Schul) writes: ]was there really a mega one st?also a 256 version of the st ever out?i hear ]these things but never heard of anyone having one? Yes I think Mega 1 did exist, briefly, and there was an unreleased 260ST and even a 130ST! I also read here once of a unreleased product that somehow escaped called a PS3000. I believe it was a SM124 like monitor with a built in floppy drive. I guess, when combined with the old driveless 520ST, it looked about as Mac like as an ST could get. It would look pretty swell on top of a Mega now. Not only that but the first STE that ST World (UK) reviewed was badged as a 4160STE though I never saw that for sale. Nor a 2080STE for that matter. I upgraded my STF to 2.5 Mb recently and just for fun worked out what that number meant in terms of badge number. 520ST * 5 = 2600ST. 2600 is the name of an Atari game console! +----------------------------------------------------------------------------+ ! DISCLAIMER:Unless otherwise stated, the above comments are entirely my own ! ! ! ! Neil Forsyth JANET: neil@uk.ac.hw.cs ! ! Dept. of Computer Science ARPA: neil@cs.hw.ac.uk ! ! Heriot-Watt University UUCP: ..!ukc!cs.hw.ac.uk!neil ! ! Edinburgh, Scotland, UK "That was never 5 years!" ! +----------------------------------------------------------------------------+
wilko@idca.tds.PHILIPS.nl (W.C. Bulte) (03/26/91)
There is definitely a Mega ST1. I have one on my desk at home.... _ __________________________________________________________________________ | / o / / _ Wilko Bulte Domain: wilko@idca.tds.philips.nl |/|/ / / /( (_) uucp : [mcsun,hp4nl]!philapd!wilko * Philips Information Systems Nederland phone: +31 55-432372 fax: +31 55-432103 "Do, or do not. There is no 'try'" Yoda - The Empire Strikes Back ________________________________________________________________________________
scale@abode.wciu.edu (Luis Outumuro) (03/29/91)
Hi Neil, Actually several of the items you mentioned actually do exist. Namely the PS3000 (I bought two, and yes... one of them looks great on top of my Mega ST4), Mega ST1 and the 4160STe. The PS3000 is a JVC-built SC1224 (yes... a color monitor) with a built-in SSDD floppy drive. The Mega ST1 I had limited availability in parts of Europe (Germany I think, someone correct me if not). The 4160STe does exist (I set some up at the NAMM show); although it is just a 1040STe with 4m of SIMM's added. It cheaper for Atari, the dealers and the users to just let the dealers and users to upgrade a 1040STe to 4m. Bye............. Luis /s -- """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Luis Mark Outumuro III | "Well... you're damned if you do, Computer Office Products 818/813-1051 | and you're damned if you don't!" Infoline 818/813-1053 | - Bart Simpson, 1990...
ekrimen@ecst.csuchico.edu (Ed Krimen) (04/01/91)
neil@cs.hw.ac.uk (Neil Forsyth) writes: - I also read here once of a unreleased product that somehow escaped - called a PS3000. I believe it was a SM124 like monitor with a built - in floppy drive. I guess, when combined with the old driveless 520ST, - it looked about as Mac like as an ST could get. It would look pretty - swell on top of a Mega now. The PS3000 was released. I've seen a couple of them. They're pretty neat. It's a color monitor (good JVC model) with a single-sided drive built-in on the lower right hand corner. - Not only that but the first STE that ST World (UK) reviewed was - badged as a 4160STE though I never saw that for sale. Nor a 2080STE - for that matter. I saw the 4160STE at San Jose WOA. As I understand it, Bob Brodie wanted it named that way so he could distinguish it from the other 1040STe's when he travelled. What's weird, if you look on the side of the boxes that Atari ships the STe's to their dealers, you will see that there's designations for 520STe, 1040STe, 2080STe, and 4160STe. -- Ed Krimen ............................................... ||| Video Production Major, California State University, Chico ||| INTERNET: ekrimen@ecst.csuchico.edu FREENET: al661 / | \ SysOp, Fuji BBS: 916-894-1261 FIDONET: 1:119/4.0