I can only guess of course, but the contents does look somewhat like what i have encountered on HP Laserjet III controller boards. An 68000 is/was quite common for them...
> -----Original Message----- > From: vartan [mailto:[EMAIL PROTECTED] > Sent: donderdag 8 januari 2004 20:24 > To: Multiple recipients of list CHIPDIR-L > Subject: a mystery TI board > > > I have come across a mystery TI board of some type and I must say it > mystifies me and piques my curiosity, and thought perhaps > someone here > may be able to shed some light on it. I know it must be annoying when > so many people often ask silly questions about random things > that have > been dug out of bins, but I have been unable to find any > information on > this using everything that could be considered a part number on it. > > The 'card' itself is about 10" long and 6.5" wide although there is a > backplate of some sort which extends a good deal longer, and > evokes the > mental image of some sort of rack-mounted device. The card also has a > metal guide-rail/support bar running along the length of one side. > > On the (assumed) rear, a 36-pin centronics style connector. > On the opposite end, a 20-pin keyed connector > On the (upper?) edge, two connectors which are shaped sort of like > PCMCIA slots but have 60 pins estimate: font cardridge connectors > Now for the board itself: > 4 side by side 20-pin headers labeled RAM1-RAM4 > 4 unlabeled 20-pin headers with pin 1 removed > 1 64-pin header with 3 pins removed > 1 60-pin header with 1 pin removed > > 1 Motorola MC68000 > 1 QFP-84 TI chip marked 2559836-001 CF61847FN N 56032 9015 > 1 QFP-132 TI chip marked 2559878-0001 CF62258APQ W18005 9017 > 1 50MHz oscillator estimate: CPU clock, divided somewhere in the qfp chips... > 1 3.6864 oscillator this is the 'standard' rs232 x-tal frequency for 68000 uart chip(s) > at U1, DIP 32 chip marked 2559855-001 TI(c)1990 JAPAN 9019D at U2, DIP 32 > chip marked 2559856-001 TI(c)1990 > The U2-H and U1-L markings make me think they are high/low bytes accordingly. > > at U31, DIP 32 socketed chip marked 2559854-0004 TI(c)1991 SHARP JAPAN 9134 D > at U28, DIP 32 socketed chip marked 2559853-0004 TI(c)1992 SHARP JAPAN 9134 D > The U31-H and U28-L markings, cause me to think a high/low pair as well. estimate: ROM's (not surprising...) one set for the program, one set for the default fonts. wto sets makes sense if the producer want a printer with a common program, but different default font set per region > Only distinguishing markings on the PCB itself are screened text: > INTERFACE CONTROL UNIT > COMMUNICATION BOARD > and on the back on a paper label 2559801-001 AR-Y/ABSR-C > 4026-0217 R115 > > and, some pictures > http://users.adelphia.net/~vartan/card1.jpg > http://users.adelphia.net/~vartan/card2.jpg > http://users.adelphia.net/~vartan/card3.jpg > > Well, perhaps this mystery will be solved, I have had this card for > something like 5 years now and am still as curious as ever. > > > -- > Author: vartan > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > > -- Author: Faasse, P.R. INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
