EPIA success and problem

[SONE Takeshi]

On Tue, May 06, 2003 at 12:13:09PM -0400, Adam Sulmicki wrote:
> > It now boots into GRUB in less than 2 seconds. :)
> > (It's too fast for IDE drive to spin up, so I have to hit reset
> > button after cold start.)
> 
> hmm, in rombios.c, can you try increasing ATA_WAIT_COUNT by magnitude or
> two and see if it helps?

Tried it but no success.
I increased that value to 0xFFFFFFFF (it should be infinite :)
but nothing changed.

Also, I put some debug statement like this:

        // If we found something
        sc = inb(iobase1+ATA_CB_SC);
        sn = inb(iobase1+ATA_CB_SN);

    printf("A\n");
        if ( (sc == 0x55) && (sn == 0xaa) ) {
    printf("B\n");
          write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_UNKNOWN);
        
          // reset the channel
          ata_reset (device);
    printf("C\n");
          
          // check for ATA or ATAPI
          outb(iobase1+ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
          sc = inb(iobase1+ATA_CB_SC);
          sn = inb(iobase1+ATA_CB_SN);
          if ( (sc==0x01) && (sn==0x01) ) {
    printf("D\n");
            cl = inb(iobase1+ATA_CB_CL);

And the output is this:

    Bochs BIOS, 1 cpu, $Revision: 1.1 $ $Date: 2002/11/25 02:07:53 $
    [BOCHS BIOS VER:1.79]
    [COMPILE DATE:May  7 2003 TIME:03:04:48]

    DEVICE:0
    A

    int13_harddisk: function 02, unmapped device for DL=80
    Boot from Hard Disk 0 failed
    FATAL: Could not read the boot disk

Then tried this:
        // If we found something
        sc = inb(iobase1+ATA_CB_SC);
        sn = inb(iobase1+ATA_CB_SN);

    printf("sc=%x sn=%x\n", sc, sn);
        if ( (sc == 0x55) && (sn == 0xaa) ) {
          write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_UNKNOWN);


And the result:

    [COMPILE DATE:May  7 2003 TIME:03:17:52]

    DEVICE:0
    sc=0080 sn=0080

    int13_harddisk: function 02, unmapped device for DL=80


Hope this helps.

--
Takeshi