halim@rangkom.MY (Abdul Halim Che Ali) (10/09/90)
Hi netters I have been trying unsuccesfully to program DMA chip - 8237 (channel 3). I try to write a value into the channel 3 - Base and Current Address Register (06H), and Base and Current Word Count Register (07H) but I do not get the same value when I read the registers back. Another problem is that there is a software command code to clear byte pointer flip/flop but it does not specify what data to write into that register. Is there any specific routine/sequence that has to be done to program other registers such as command, mode, request and mask? Thanks in advance. BTW, I don't have on-line access to USENET news, so please respond by email. Halim