wilner@motcid.UUCP (Corey S. Wilner) (05/07/91)
I have come across a problem with my extended 80-column board and double-hi-res graphics. It don't work!!! I connect the jumper between pins 50 and 55 on the card but the system goes haywire (some of the time) when DHR mode is entered (as far as I can tell). Even when DHR seems to be working, not everything appears on the screen correctly. This could be the monitor (I have a Monitor ///, I think, it's what was sold with the units back in 1983) but that doesn't tell me why the computer screws up. I have a revision B motherboard so I don't think that is the problem (the manual mentions that DHR can't be used on Rev. A boards.). Since this is not an Apple product (I got it from a friend in Korea a few years back), I am not sure it was built with the proper speed DRAMS. They are 150ns types. This is the only thing I can think of that would screw up DHR. The board works perfectly otherwise (RAMDISK, Appleworks, etc.) without the jumper being in. Any answers?? ******************************************************** Corey S. Wilner | | __o Motorola Cellular | ..!uunet!motcid!wilner | -\<, 708-632-7206 | motcid!wilner@uunet.UU.NET | O/ O ******************************************************** The three most dangerous things in the world are a hardware type with a program patch, a programmer with a soldering iron, and a user with an idea.