My guess is it’s a RasterOps or equivalent two-page display card. From the start Radius cards looked like they were made by Apple in terms of their identifying markings, and even their part numbering scheme.
The best thing you can do is (1) cover the window on the EPROM to ensure it doesn’t get erased by ambient UV and (2) work with someone to read it, either by (a) pulling the ROM and putting it in a programmer or by (b) installing the card in a Mac and reading it with some software. I think 2b is the easiest strategy, at least if you have a NuBus Mac handy. I believe Joshua Juran’s MacRelix even comes with a tool that can be used to dump a card ROM. If not, it should be easy to write one: A NuBus card’s declaration ROM has to be at a specific point in slot space and follow a specific structure for the card to be recognized—especially for a video card, which needs to be usable by the operating system at boot. — Chris Sent from my iPad > On Dec 1, 2017, at 8:53 AM, William Stillwell <ki4...@gmail.com> wrote: > > You could also Read the EEPROM and see if there is any plain text identifiers > in it. > > William Stillwell > > Board Member - Inspiration labs, Inc. a 501c3 organization > > Board Member - West Central Florida Group, Inc. a 501c3 organization > > Board Member & Co-Founder - Byte Amusement Group // Free Play Florida Arcade > & Pinball Show a 501c3 organization > > Board Member - Clearwater Amateur Radio Society > > >>> On Fri, Dec 1, 2017 at 11:42 AM, mike stedman <rav...@gmail.com> wrote: >>> If I had to guess, the window on that chip indicates that it is probably a >>> UV-erasable EEPROM. It most likely shipped with a sticker to keep it from >>> being erased, which has now fallen off. I'd probably put a new sticker on >>> there to block the sunlight and keep it from getting wiped. >>> >>> On Fri, Dec 1, 2017 at 9:39 AM, Gary Satterfield <amamacw...@gmail.com> >>> wrote: >>> I also thought it strange that there is a small round window on the chip >>> nearest the TI video controller. The date on the card is 1988 too. :D >>> >>>> On Friday, 1 December 2017 03:53:51 UTC-6, Gregg Eshelman wrote: >>>> Combine a versatile Non-VGA Video Controller like that TI chip (it also >>>> has a line drawing mode, I presume for vector monitors) with the Brooktree >>>> 256 color palette RAMDAC, along with the male DE-9* connector and I'd say >>>> you have some rather proprietary 8bit raster graphics display card. Most >>>> likely not a vector display card with an 8 bit color raster RAMDAC. ;) >>>> >>>> Find the RAM chips and count up how much there is to get some idea of the >>>> maximum possible resolutions it could support at 1, 4, 16 and 8 bit color >>>> depths. >>>> >>>> It could be for a high resolution 1 bit monitor, but why use a DAC that's >>>> made for color on it? I've done some searching and the only NuBus video >>>> card I could find with a DE-9 is a Radius Full Page Display card, but it >>>> has a female instead of a male connector. >>>> >>>> There were monitors made with a single DE-9 port and stitches to change >>>> between TTL mono/color and analog modes so one monitor would work with any >>>> PC video output, usually up to 800x600. Some also supported the oddball >>>> Mac video modes which were slightly larger than 640x480 or 800x600. >>>> 832x624? I still have such a monitor. IIRC it's the original model of NEC >>>> MultiSync. No model designation, just MultiSync. Has a built in cooling >>>> fan and a worn out CRT. >>>> >>>> Analog RGB video can be done using only 8 pins. That card is certainly not >>>> doing any monitor identification through the connector. Might be fixed >>>> resolution/colors/frequency. Might support several. Given the age of it, >>>> it *might* use the 9 pin VGA pinout. Easy to find with google. >>>> >>>> http://www.icpdf.com/icpdf_datasheet_5_datasheet/TMS34061FNL_pdf_1548294/#view >>>> >>>> *There is no such thing as a DB-9 connector. The B size is the 25 pin used >>>> for Mac SCSI and PC parallel and 25 pin serial ports. The Mac video >>>> connector before Apple adopted the VGA standard was a DA-15, also used for >>>> PC joysticks. The 15 pin VGA port should properly be called a HDE-15 but >>>> most people call it HD-15. Apple's 19 pin floppy drive port was only ever >>>> used for that purpose and has no official letter size designation. The guy >>>> who has the Big Mess-o-wires website makes a solid state floppy drive >>>> replacement and had to reverse engineer that connector to have a large >>>> batch of new ones made in China. Thus at one time he had the entire >>>> world's supply of new Apple external floppy drive connectors in boxes on >>>> his back porch. >>>> >>>> On Thursday, November 30, 2017, 10:24:43 PM MST, Gary Satterfield >>>> <amama...@gmail.com> wrote: >>>> >>>> >>>> After shuttering my Mac repair and consulting business several years ago, >>>> I recently decided to dig through all the miscellaneous stuff I collected >>>> over the years. The Nubus card you see in the attachments has me >>>> scratching my head about what exactly it is. The only thing I am sure of >>>> is that it is some sort of video card, judging by the Texas Instruments >>>> chip (I Googled it to see what it was). The thing that throws me is the >>>> video-out connection - it appears to be DIN-9, but only in reverse. >>>> >>>> Have a look at the pics and see if you can tell me what this weird thing >>>> is! Please? Thank you kindly! >>> >>> -- >>> -- >>> ----- >>> You received this message because you are a member of the Vintage Macs >>> group. >>> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our >>> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml >>> To post to this group, send email to vintage-macs@googlegroups.com >>> To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/vintage-macs >>> >>> Support for older Macs: http://lowendmac.com/services/ >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "Vintage Macs" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to vintage-macs+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >> >> >> >> -- >> Mike >> http://ravuya.com >> -- >> -- >> ----- >> You received this message because you are a member of the Vintage Macs group. >> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our >> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml >> To post to this group, send email to vintage-macs@googlegroups.com >> To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/vintage-macs >> >> Support for older Macs: http://lowendmac.com/services/ >> --- >> You received this message because you are subscribed to the Google Groups >> "Vintage Macs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to vintage-macs+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. > > -- > -- > ----- > You received this message because you are a member of the Vintage Macs group. > The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to vintage-macs@googlegroups.com > To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > --- > You received this message because you are subscribed to the Google Groups > "Vintage Macs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to vintage-macs+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- -- ----- You received this message because you are a member of the Vintage Macs group. 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