Hi!
9-Дек-2004 01:22 [EMAIL PROTECTED] (Michael Devore) wrote to
[EMAIL PROTECTED]:
MD> Do FreeDOS disk accesses via INT 21h, INT 13h, INT whatever,
INT13 only (INT21 and INT25/26 are DOS internal entries).
MD> read and write
MD> directly from/to a passed address or do they always buffer the disk
MD> access? Never? Sometimes? Buffering meaning read from disk to internal
As already explained by Bart, there are two levels of buffering: over
INT13, if buffer resides over A000h address (see explicit reference to
0xa000 in dsk.c:LBA_Transfer()), and at higher level, when transfer is not
sector-aligned.
MD> If never/sometimes, is there is a way to make it buffer always rather than
MD> directly read/write to/from address.
Transfer non-sector-aligned (size not equal to 512*x) and/or above
0xA000 buffers.
MD> If always/sometimes, is there a way to make it never buffer?
Reverse above condition.
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