[SeaBIOS] Floppy drive configuration

[Eduardo Batalha]

Hi all,

I own an ASUS P5Q and had the same problem that Petr Cvek mentioned in his previous emails.
I was configuring the floppy type using the the etc/floppy0 value in cbfs but took me quite a while to figure out that why linux was not showing it.
I haven't tested it myself yet, but I think the solution to the floppy configuration issue may be to continue using etc/floppyX and change these lines in floppy.c from

} else {
        u8 type = romfile_loadint("etc/floppy0", 0);
        if (type)
            addFloppy(0, type);
        type = romfile_loadint("etc/floppy1", 0);
        if (type)
            addFloppy(1, type);
    }

to

} else {
        u8 type0 = romfile_loadint("etc/floppy0", 0);
        if (type0) 
            addFloppy(0, type);
        u8 type1 = romfile_loadint("etc/floppy1", 0);
        if (type1) 
            addFloppy(1, type1);
        if (type0 || type 1)
           rtc_write(CMOS_FLOPPY_DRIVE_TYPE, type0 <<4 | type1);
    }

Quoting from osdev.org :
"The first 14 CMOS registers access and control the Real-Time Clock. In fact, the only truly useful registers remaining in CMOS are the Real-Time Clock registers, and register 0x10. All other registers in CMOS are almost entirely obsolete (or are not standardized), and are therefore useless. "
So, register 0x10, the floppy drive type, is, conversely, pretty much standardised...

Hope this makes sense...

Cheers,
Ed