|
From: | Gerhard Wiesinger |
Subject: | Re: [SeaBIOS] [Qemu-devel] QEMU regression problems |
Date: | Mon, 19 Apr 2010 08:19:55 +0200 |
User-agent: | Thunderbird 2.0.0.24 (Windows/20100228) |
Kevin O'Connor wrote:
On Tue, Apr 13, 2010 at 02:26:10PM +0800, Roy Tam wrote:2010/4/12 Gerhard Wiesinger <address@hidden>:3.) There is also a problem with the reported base memory under QEMM386 (HIMEM.SYS and EMM386.EXE is correct here). It is 646kB instead of 640kB. Therefore base memory test fails. I guess that reporting memory CMOS tables/interrupt functions are not implemented correctly.- The Base Memory > 640K error seems to be SeaBIOS related. QEMU Bochs BIOS(tested with both -old-bios hack in 0.12 series and old 0.11.1) will just freeze after QEMU counted RAM.(Tested with ScriptPC and Bochs).The SeaBIOS log would really help. This can be done by adding: -chardev stdio,id=seabios -device isa-debugcon,iobase=0x402,chardev=seabios to the qemu command line. The memory can be obtained in several places (int 12, int 1588, int 15e801, int 15e820, and mem 40:13). All look fine to me from looking at the code. OK, I made some research on the topic. Problem is that QEMM pushes the Extended BIOS data area to High RAM on some machines (QEMU, P733). Therefore 640k low memory is available and checkit reports 640kB + 6kB=646kB EBIOS DATA AREA. Whats strange that on a physical Pentium 733 machine this works correctly (details see below and attached files), maybe someone can try to find the problem with QEMM+Checkit 3.0 (maybe there is still some other BIOS function incorrectly implemented). QEMM parameter NOXBDA avoids moving the XBDA up to HI RAM and therefore checkit reports 640kB well. SeaBIOS seems to be correct (see below and attached patch files and description below). Total Memory: 256MB (262144kB), Base RAM: 637kB Extended BIOS Data Area size: 3 kB, segment=9f40 SCSI option ROM: After option ROMS, Total Memory: 256MB (262144kB), Base RAM: 634kB Extended BIOS Data Area size: 6 kB, segment=9e80 MS-DOS 6.22, QEMM 8.03 QEMU
VMWare
Pentium 733
Attached documents: Code and Patches can
be found at (released under GPL V2): Build script will be released under my DOS-Tools
soon (some cleanup necessary).
|
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=640, 640kB INT 12h: AX=640, 640kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3840, extended memory above 16M, in 64K blocks: 245760kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3840, configured memory above 16M, in 64K blocks: 245760kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9E800h (649216), 634kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=B0B5h, memory=6kB Device driver entry point=D1EEh:023Ch, Device flag 1st byte=00h, 2nd byte=83h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=638, 638kB INT 12h: AX=638, 638kB INT 15h, AH=88h AX=64512, number of continuous kB starting at absolute address 100000h: 64512kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3823, extended memory above 16M, in 64K blocks: 244672kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3823, configured memory above 16M, in 64K blocks: 244672kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9F800h (653312), 638kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9F80h, memory=2kB Device driver entry point=0000h:0000h, Device flag 1st byte=00h, 2nd byte=02h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=638, 638kB INT 12h: AX=638, 638kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3823, extended memory above 16M, in 64K blocks: 244672kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3823, configured memory above 16M, in 64K blocks: 244672kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9F800h (653312), 638kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9F80h, memory=2kB Device driver entry point=CB02h:023Ch, Device flag 1st byte=00h, 2nd byte=C2h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=638, 638kB INT 12h: AX=638, 638kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3823, extended memory above 16M, in 64K blocks: 244672kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3823, configured memory above 16M, in 64K blocks: 244672kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9F800h (653312), 638kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9F80h, memory=2kB Device driver entry point=02FFh:023Ch, Device flag 1st byte=00h, 2nd byte=C2h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=639, 639kB INT 12h: AX=639, 639kB INT 15h, AH=88h AX=65472, number of continuous kB starting at absolute address 100000h: 65472kB INT 15h, AX=E801h Not successful INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9FC00h (654336), 639kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9FC0h, memory=1kB Device driver entry point=0000h:0000h, Device flag 1st byte=00h, 2nd byte=00h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=640, 640kB INT 12h: AX=640, 640kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h Not successful INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9FC00h (654336), 639kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=D1B5h, memory=1kB Device driver entry point=B11Bh:023Ch, Device flag 1st byte=00h, 2nd byte=82h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=634, 634kB INT 12h: AX=634, 634kB INT 15h, AH=88h AX=64512, number of continuous kB starting at absolute address 100000h: 64512kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3840, extended memory above 16M, in 64K blocks: 245760kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3840, configured memory above 16M, in 64K blocks: 245760kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9E800h (649216), 634kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9E80h, memory=6kB Device driver entry point=0000h:0000h, Device flag 1st byte=00h, 2nd byte=00h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=634, 634kB INT 12h: AX=634, 634kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3840, extended memory above 16M, in 64K blocks: 245760kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3840, configured memory above 16M, in 64K blocks: 245760kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9E800h (649216), 634kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9E80h, memory=6kB Device driver entry point=08A9h:023Ch, Device flag 1st byte=00h, 2nd byte=83h
Memory Information V1.0, (c) 2009-2010 by Gerhard Wiesinger BIOS area 40h:13h=634, 634kB INT 12h: AX=634, 634kB INT 15h, AH=88h AX=0, number of continuous kB starting at absolute address 100000h: 0kB INT 15h, AX=E801h AX=15360, extended memory between 1M and 16M: 15360kB BX=3840, extended memory above 16M, in 64K blocks: 245760kB CX=15360, configured memory between 1M and 16M: 15360kB DX=3840, configured memory above 16M, in 64K blocks: 245760kB INT 15h, AX=E820h structure len=20 base address 0h (0) length in bytes 9E800h (649216), 634kB type of address range: memory type=1 type of address range: memory type=memory, available to OS EBDA - Extended BIOS Data Area information, found, segment=9E80h, memory=6kB Device driver entry point=D1EEh:023Ch, Device flag 1st byte=00h, 2nd byte=83h
[Prev in Thread] | Current Thread | [Next in Thread] |