Hi!
______________O\_/_________________________________\_/O______________
inthndlr.c/int2F_12_handler:
- bug: INT2F/4A01: instead available size in BX always returned 0.
- bug: INT2F/1213 should return AL, not AX.
- bug: blockio.c/AllocateHMASpace(): wrongly freed extra buffer because
"FP_OFF(bp+1) >= lowbuffer" expression (should be ">").
config.c:
- NBUFF (default and min allowed value for buffers=) is set to 20 (too high);
code to allocate min 6 buffers already present in config_init_buffers().
config.c/config_init_buffers():
- bug: with argument=-1, firstAvailableBuf points to first buffer, not to
next following buffer.
- value of buffers= (say 80) ignored, if it positive and HMA present.
- if HMA present, but buffers in low memory (buffers=-80), then memory
after kernel in HMA not available for INT2F/4A0x (firstAvailableBuf
not points to HMA); support for this requires also modification in
blockio.c/AllocateHMASpace():
if (FP_SEG (firstbuf) != /*HMASEG*/0xFFFF)
return;
_____________________________________________________________________
O/~\ /~\O
In next letter I present patches, which will fix all of these bugs and
inconsistencies, also as reduce kernel size after BC: in memory by 176
bytes, unpacked executable by 182 bytes.
And YES, all of this tested - both in original (2033) kernel and in
kernel with my updates.
PS: In inthndlr.asm present string "FreeDOS kernel version 1.1.33 ..."
(total 67 characters), because os_release variable in globals.h; this
variable used by INT 21/33FF, which is "FreeDOS extension" (see
int21_syscall()).
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