alan@ecrcvax.UUCP (Alan P. Sexton) (06/06/89)
Can anyone give me an address or telephone number from which I can order a datasheet for the Yamaha YM-2149 sound chip that is used in the Atari? Alan Sexton tel. (089) 92699164 European Computer-Industry Research Centre (ECRC) Arabellastr 17, 8000 Muenchen 81, West Germany mcvax!unido!ecrcvax!alan | from US: ...!pyramid!ecrcvax!alan alan@ecrcvax.UUCP | from US: alan%ecrcvax.uucp@pyramid.pyramid.com
dag@per2.UUCP (Daniel A. Glasser) (06/08/89)
In article <735@ecrcvax.UUCP>, alan@ecrcvax.UUCP (Alan P. Sexton) writes: > Can anyone give me an address or telephone number from which I can order > a datasheet for the Yamaha YM-2149 sound chip that is used in the Atari? The Yamaha YM-2149 is a slightly modified (I forget how) license of the General Instrument AY-3-8910 PSG (Programmable Sound Generator. GI published a very good manual for this chip under the title "Programmable Sound Generator Data Manual" in February, 1981 (I cannot find a part number) which covers the architecture, operation, electrical interface, and music and sound effects generation. It has some pretty interesting information on using the D/A circuitry. The document covers both the AY-3-8910 and the AY-3-8912 PSG. The '8912 is in a 28 pin package does not have the B I/O port, an "extra" address line, or an additional test pin (which is not used in normal operation anyway.) Programming-wise, these chips are identical. The Yamaha chip may have a different pin-out. I don't have my Atari documentation handy. The manual has the following addresses: (quoted without permission) Microelectronics Division/General Instrument Corporation WORLDWIDE SALES OFFICES -------------------------------------------------------- NORTH AMERICA Microelectronics Division Northeast -- 600 West John Street Hicksville, New York 11802 Tel: 516-733-3107, TWX: 510-221-1866 Southeast -- 7901 4th St. N., Suite 208 St. Petersburg, Florida 33702 Tel: 813-577-4024, TWX: 810-863-0398 American City Bldg., Suite 602 Columbia, Maryland 21044 Tel: 301-730-8992, TWX: 710-862-2861 South Central - 5520 LBJ Frwy., Suite 330 Dallas, Texas 75240 Tel: 214-934-1654 East Central -- 4524 S. Michigan Street South Bend, Indiana 46614 Tel: 219-291-0585, TWX: 810-299-2518 Central -- 2355 S. Arlington Hts. Rd., Suite 408 Arlington Heights, Illinois 60005 Tel: 312-981-0040, TWX: 910-687-0254 Southwest -- 201 Standard Street El Segundo, California 90245 Tel: 213-322-7745, TWX: 910-384-6296 Western -- 3080 Olcott St., Suite 235 D Santa Clara, California 95051 Tel: 408-496-0844, TWX: 910-379-0010 EUROPE European Sales Headquarters: General Instrument Microelectronics Ltd. Regency House, 1-4 Warwick Street, London W1R 5WB Tel: 01-439-1891, Telex: 23272 Central European Sales Office: General Instrument Deutschland GmbH (MOS Produktgruppe) , Nordenstrasse 3, 8000 Munchen 40 Tel: (089)28.40.31, Telex: 528054 Southern European Sales Office: Via Jacopo Palma, 20146 Milano Tel: (02)408.41.01, Telex: 332423 Note that the above information is from a document dated February, 1981, and may have changed substantially over the past eight years. I have left out the Asian contacts because I'm very lazy. -- _____________________________________________________________________________ Daniel A. Glasser One of those things that goes uwvax!per2!dag "BUMP!!!(ouch)" in the night. ---Persoft, Inc.---------465 Science Drive-------Madison, WI 53711-----------
FORSTER@cs.umass.EDU (David Forster) (06/11/89)
Since you bring up the subject, does the chip also do something with incoming audio signals? I noticed there's a pin for it on the monitor plug. Is this actually connected? (On the TI Explorer in my office, the audio chip not only generates sound, but also can be connected to a microphone to record sound, so this doesn't sound like such an unreasonable proposition.) - David Forster (forster@cs.umass.edu / forster@umass.bitnet)
obryan@gumby.cc.wmich.edu (Mark O'Bryan) (06/13/89)
In article <8906110020.AA01982@crash.cs.umass.edu>, FORSTER@cs.umass.EDU (David Forster) writes: > Since you bring up the subject, does the chip also do something with incoming > audio signals? I noticed there's a pin for it on the monitor plug. Is this > actually connected? (On the TI Explorer in my office, the audio chip not only > generates sound, but also can be connected to a microphone to record sound, so > this doesn't sound like such an unreasonable proposition.) The audio input pin is designed for mixing an external input with the internally generated 3 audio channels + noise. The chip was designed to be usable in a number of low-cost configurations, for various purposes, and provided this feature as a free-bie. There's no A-to-D converter inside that could be used to digitize the incoming audio. In fact, I don't think there's even a level comparator, so you couldn't even do the A-D in software if you wanted to (and could live with the slow speed). -- Mark T. O'Bryan Internet: obryan@gumby.cc.wmich.edu Western Michigan University Kalamazoo, MI 49008