Question

(Answering from area .NETMAIL)

17 Jan 98 Denis Dmitriev hoping that Roman Milukov will read,
wrote:
...[skipped]
DD> And also - ask the sprinters (like this is ivan mak) how
DD> on
DD> sprinter interrupts from ISAs are processed, and how
DD> mac-
DD> their DMA works (description of this whole thing). Ato
DD> figs you will understand - it seems like a good car, but they are not the same
DD> parameter-
DD> you praise...
Here. I'm asking. (DISMASTER has difficulties with sending letters to the echo, I think
temporary.)

All the best.
With respect, Roman Milukov.

DD>> you'll understand - it seems like a good machine, but they're praising the wrong parameters...
Interrupts from the ISA are sent to the processor port. When the state of the input data changes, the port itself generates interrupts. In IM 2 mode, it has an interrupt vector register.
The DMA signal from the ISA bus is also supplied to this port (to a different bit) and also
generates a processor interrupt. To organize DMA-type cycles, the necessary signals, in addition to
addresses and data, to the ISA are also supplied via the port.
DMA cycles for the card are cycles of reading from memory and writing to memory for the
processor.

░▒▓██ Yours sincerely, Ivan. ██▓▒░

TR-DOS 5.04Ei