jh@efd.lth.se (Joergen Haegg) (06/18/91)
I have a PC2A GPIB interface from National Instruments (rev A) and I am trying to use it with Unix. I have written my own device-driver, and it works fine if I could get IRQ right. The problem is that I don't know how the card handles IRQ. IRQ seems to be blocked somewhere so I have wired INT on the 7210 chip directly (through a free buffer) to IRQ, and so I get my interrupt. But it seems as if I need some form of synchronization. I lost track of IRQ in a bunch of TTL and PAL, which probably has something with DMA to do. Does anyone know how I enable and use IRQ (and maybe DMA)? -- Joergen Haegg jh@efd.lth.se postmaster@efd.lth.se System manager @ efd 046-107492 Lund Institute of Technology E-huset, DDG, Ole R|mers v. 3 221 00 LUND, Sweden