On Mon, Nov 27, 2000 at 03:32:56PM +0100, Erik Sigra wrote:
> OK, that boot parameter seems to work. It gives the result below. I really
> think this should be explained better in the documentation. (ECP+EPP is
> enabled in my BIOS, and DMA 3 is set.)
Yeah, it should.
> parport now. Strange that it doesn't recognize the dma first, but in
> the line after that.
I'll explain:
> 0x378: FIFO is 16 bytes
> 0x378: writeIntrThreshold is 16
> 0x378: readIntrThreshold is 16
> 0x378: PWord is 8 bits
> 0x378: Interrupts are ISA-Pulses
> 0x378: ECP port cfgA=0x10 cfgB=0x48
> 0x378: ECP settings irq=7 dma=<none or set by other means>
Above is everything that it was able to discover from the chipset
itself by just asking it.
> parport0: PC-style at 0x378 (0x778), irq 7, dma 3 [PCSPP,TRISTATE,COMPAT,EPP,ECP,DMA]
Whereas here the DMA is set by the parameter you gave it. This ought
to be explained better in the log messages too.
> parport0: cpp_daisy: aa5500ff(08)
> parport0: assign_addrs: aa5500ff(08)
> parport0: cpp_daisy: aa5500ff(08)
> parport0: assign_addrs: aa5500ff(08)
This is some probing for daisy-chain aware devices.
> parport0: Printer, HEWLETT-PACKARD DESKJET 870C
This is a successful IEEE 1284 Device ID probe.
Tim.
*/
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