Re: [Freedos-kernel] FreeDOS disk I/O is much slower then MSDOS

2018-11-05 Thread C. Masloch
On at 2018-11-05 15:51 +0100, Tom Ehlert wrote: >> the FreeDOS kernel is seriously slower then MSDOS when doing >> larger copy/xcopy operations. > >> the cause: the disk I/O code avoids transfers that cross a 64K >> boundary, and splits these transfers into 3 (smaller) transfers. > >> this was

Re: [Freedos-kernel] [Freedos-user] FreeDOS Boot Disc

2012-09-27 Thread C. Masloch
Hi Eric, Kernel on that image uses 386+ instructions... and it seems as if it does that without (properly) checking for the presence of a 386. That is correct, as a kernel cannot be both optimized for 386 and compatible with 8086 at the same time. Well, yes it could (look at FreeDOS

Re: [Freedos-kernel] [Freedos-user] Virtual floppy change problem and slow VirtualBox UIDE2 init problem

2012-05-23 Thread C. Masloch
When DOS detects an unreliable floppy change line hardware, it should use the floppy label / serial / similar to detect changes in software ... How does DOS ever detect that any hardware is unreliable?? I do not know, but earlier in this thread, somebody said that the numbering of FAT

Re: [Freedos-kernel] Regarding commit 1702 (large sector sizes)

2012-02-09 Thread C. Masloch
Note that the 1702 changes were effectively reversed by 1704. The 1705 changes are unrelated. Wrong From -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but

[Freedos-kernel] Commit 1705

2012-02-07 Thread C. Masloch
to use the field in an incompatible manner, and neither is the new 21.33 subfunction that the commit adds, because no one uses it yet. Even so, the subfunction does not require using that particular field to store the detected CPU level. Regards, C. Masloch

[Freedos-kernel] Regarding commit 1702 (large sector sizes)

2012-02-05 Thread C. Masloch
end signature location?) while you might have to get creative for the very small sizes, because a full BPB would not fit. I'd suggest just expecting the BPB to stretch several sectors then; the filesystem already allows reserved sectors to be properly implemented using the BPB. Regards, C

Re: [Freedos-kernel] Regarding commit 1702 (large sector sizes)

2012-02-05 Thread C. Masloch
is too large, but still working on relearning the init time segment relocations and order to determine a proper fix for buffer allocations. It would help if printf worked correctly in all the init code... The virtues of high-level language kernel development ;) Regards, C. Masloch