Hello.
I have three questions:
1. Does freeDOS have a ramdisk and if so how do I use it?
2. What does execrh do?
3. Bart wrote:The default block device driver is in dsk.c, dsk.c then
translates relative (partition) sector numbers into absolute (disk) sector
numbers and (unless using LBA) cylinder/head/sector, and calls int13 BIOS
functions via floppy.asm.
> "unless using LBA": explain please... I need all the information
you've got about the layers after blockio.c
//Daniel
Bart wrote:
>
>in general it works like
>int21 -> entry.asm-> inthndlr.c -> dosfns.c (calls dosnames.c
>& newstuff.c)
>(this was the uninteresting stuff for you)
>
>now we have a full qualified name (like C:\FOO\BAR.TXT, no ..
>or relative
>paths any more). This name is fed into the filesystem functions:
>
>fatfs.c (open, read, write, close etc), and
>fatdir.c (findfirst/findnext/dirread, etc)
>which use fattab.c to walk the FAT chain
>
>now we have a sector number, that is fed into the buffer code:
>blockio.c
>blockio.c calls execrh in execrh.asm, which calls the device driver.
>
>The default block device driver is in dsk.c, dsk.c then translates
>relative (partition) sector numbers into absolute (disk) sector numbers
>and (unless using LBA) cylinder/head/sector, and calls int13 BIOS
>functions via floppy.asm.
>
>Bart
>
>
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