Use BIOS to probe for memory map.

Probe for BIOS supported disks.
Use BIOS to get geometry for supported disks.

All in preparation to passing the whole thing
to the kernel.

1 files changed, 22 insertions, 11 deletions

diff --git a/sys/arch/i386/stand/README b/sys/arch/i386/stand/README
index a5748f08075..e596ac29873 100644
--- a/sys/arch/i386/stand/README
+++ b/sys/arch/i386/stand/README
@@ -1,4 +1,4 @@
-$OpenBSD: README,v 1.10 1997/09/02 21:41:29 kstailey Exp $
+$OpenBSD: README,v 1.11 1997/10/17 15:03:16 weingart Exp $
 
 # hmm, no copyright
 
@@ -92,14 +92,14 @@ things work without -DSAVE_MEMORY, and don't with it defined.
 Mon Apr 21 15:25:42 EDT 1997
 ----------------------------
 
-Now memory limits are not in concern. No any restrictions on placement
-and sizes of code/data. It would be an idea to move PMMM code from kernel
-into /boot to use low memory somehow, then remember that upper 64k are
-used by apm, so do not grow too much... Low 64k are used for real mode
+Now memory limits are not a concern. No more restrictions on placement
+and size of code/data. It would be an idea to move PMMM code from kernel
+into /boot to use low memory somehow.  Also remember that the upper 64k is
+used by apm, so do not grow heap too much... Low 64k is used for real mode
 IDT, BIOS data, stack for /boot, so stack is big enough (about 60k).
 All the magic w/ prot-real mode interface now in one place <libsa/gidt.S>.
 BIOS (and DOS soon) interrupt entry points are now just as simple as
-they are in real mode (just use a macro BIOSINT, which shifts int#
+they are in real mode (just use a macro BIOSINT, which shifts int number
 by 0x20, that all! ;).
 
 
@@ -114,22 +114,33 @@ to use sleep instead, it's known to work.
 Thu Jul 17 21:24:42 EDT 1997
 ----------------------------
 
-Return to the way when code have to be less then 64k, or better say that
+Return to the way when code has to be less then 64k, or better say that
 whole gidt.S code must be in the 1st 64k of /boot .text section.
 This saves about 2k of code (idt initialization).
 APM information is now gathered and passed to the locore.s upon kernel
-startup as pointer to the struct apm_connect_info.
+startup as a pointer to the struct apm_connect_info.
 
 
 Wed Aug 27 16:30:51 EDT 1997
 ----------------------------
 
-BIOS boot device number is passed to kernel along with BIOS geometry for that
-drive and other info. APM connect info is passed as well not in that
-apm0 structure, so apm0 will become a slave on bios0 soon.
+BIOS boot device number is passed to the kernel along with BIOS geometry
+for that drive and other info. APM connect info is passed as well not in
+that apm0 structure, so apm0 will become a slave on bios0 soon.
 To get your /boot installed properly on a hardrive you have to load /bsd
 from that hd/partition (since only boot drive geometry is passed).
 The passed geometry will be used for all the drives, if you
 will try to installboot on other disks (floppies and pseudo-disks will
 honor the disklabel), that might be useful on some bioses,
 esp. SCSI HAs which use fixed translated geometry for all the drives.
+
+
+Mon Oct 13 16:41:18 CDT 1997
+----------------------------
+
+Clean up memprobe some, adding support for querying the BIOS for the
+memory map.  Resort to the old invasive probe if all else fails.  Add
+preliminary support for passing a memory map to the kernel, instead of
+cnvmem/extmem.  This should make weird boards easier to support in the
+future.
+