gsk@khaki.sgi.com (George S. Kong) (12/15/89)
i would like to buy a STB Multires II board, or a Taxan 557 GOLD Card, or some other EGA board that is capable of driving an AT&T 318 monitor (which is EGA-like, but not a true EGA monitor). if you have such a board that you'd like to sell at a reasonable price, or you know where i can buy one new, please reply by e-mail. thanks. George S. Kong, Silicon Graphics, Inc., (415)962-3281 gsk@sgi.com ...{decwrl,allegra,adobe,ucbvax,pyramid,ames}!sgi!gsk
mrk@gvgspd.GVG.TEK.COM (Michael R. Kesti) (12/16/89)
In article <46407@sgi.sgi.com> gsk@khaki.sgi.com (George S. Kong) writes: >i would like to buy a STB Multires II board, or a Taxan 557 GOLD Card, >or some other EGA board that is capable of driving an AT&T 318 monitor Is this really possible, I mean running an EGA card with the 318? I know how to disable the built in display adapter, but what has always kept me from upgrading was the cost of a new CRT. I have a 318/T monitor. Can I install one of these cards and get EGA? This inquiring mind would like to know! -- ============================================================================ Michael Kesti Grass Valley Group, Inc. | "Like one and one don't make two, mrk@gvgspd.GVG.TEK.COM | one and one make one." !tektronix!gvgpsa!gvgspd!mrk | - The Who, Bargain
sklar@cbnewse.ATT.COM (robert.s.sklar) (12/24/89)
In article <936@gvgspd.GVG.TEK.COM>, mrk@gvgspd.GVG.TEK.COM (Michael R. Kesti) writes: > In article <46407@sgi.sgi.com> gsk@khaki.sgi.com (George S. Kong) writes: > >i would like to buy a STB Multires II board, or a Taxan 557 GOLD Card, > >or some other EGA board that is capable of driving an AT&T 318 monitor > > Is this really possible, I mean running an EGA card with the 318? I > know how to disable the built in display adapter, but what has always > kept me from upgrading was the cost of a new CRT. I have a 318/T > monitor. Can I install one of these cards and get EGA? > > This inquiring mind would like to know! > > -- > ============================================================================ > Michael Kesti Grass Valley Group, Inc. | "Like one and one don't make two, > mrk@gvgspd.GVG.TEK.COM | one and one make one." > !tektronix!gvgpsa!gvgspd!mrk | - The Who, Bargain Yes, it is possible to use AT&T 318 and 319 monitors as EGA monitors. AT&T supports this with the 750 video controller. Prior to the introduction of the 750, AT&T recommended (I am not sure if this was official) the STB Multires II EGA board mentioned above. Using the STB or other board capable of operating at 25 KHz and using a standard DB9 connector requires the use of a DB9 to DB25 adapter. Of course, the AT&T 750 board has the AT&T standard DB25 video connector. It also has a connector on the board for the 15V power supply required by the AT&T monochrome monitors. All that is needed is to move the 15V power cable connected to the built-in video card in the 63xx. When installing a different video card in an AT&T PC63xx with a built- in video controller, it is necessary to disable the built-in card. Some of the later cards have a jumper that can be moved to disable the card. Early cards can be disabled by replacing one of two chips with an appropriately wired header plug. For those interested in an inexpensive 25KHz color monitor for use with an AT&T PC, a Roland CD240 can be used with a simple *active* adaptor or adaptor cable. I think that this monitor is still available from California Digital for about $220.00. It is a very nice monitor (I own one, and a close friend owns one) whos only drawbacks are that it is not super bright and that it needs the adaptor. The adaptor required for the Roland CD240 must invert the horizontal and vertical sync signals. This is easily done with a 74LS04, which can be powered by a 78L05 miniature (~100mA) voltage regulator that is fed by the +15V pins on the DB25 video connector. This adaptor also takes care of the DB9 to DB25 conversion. If the Roland is used with an STB Multires II, the invertors are not needed, as the STB has options to take care of this. Robert S. Sklar AT&T Bell Laboratories Naperville, Illinois (312) 979-4323 att!ihlpl!sklar