Attached files are BY31 BIOS and checklist.
 
110-BIOS.zip==> BIOS.wph, ALL.bat, PHLASH16.exe
                       
110-CheckList.zip==> BY31 BIOS CheckList WinXP-110.DOC, BY31RDME.TXT, K38XRELS.TXT
                                       
*To update BIOS in DOS mode, extract all files from 110-BIOS.zip, boot to DOS, and run ALL.bat.
 
*Use command PHLASH16 /x /pf=osfl /bbl to flash BIOS.
                                             

To update the bios in Windows mode install Winflash in Windows and extract the contents of the 110-bios.zip file to the hdd. Start Winphlash and choose bios.wph from the directory to where you extracted the 110-bios.zip file. 
                                       
System BIOS Release Note: BY31RDME.TXT 
   ============================================================
BY31       System BIOS Release Notification                  12/06/2004
 
*SYS BIOS: BY31110S.ROM
*EC BIOS   : K38X110A.ROM or later
*VGA BIOS: RXBY31_4.215 (008.016M.019.000 rxby31_4.215)
           1. BIOS kits: Ver 008.016M.019.000 rxby31_4.215)
           2. Eng/Mem clock is 215/200 MHZ.
           3. MPLL_CNTL = 0400xxxx
           4. Enable LVDS/Mem SS function.
*10/100 PXE ROM: v2.13 (020326)
*Checksum: E2B4h
 
    Notification:
 
    Issue Fixed:
          1. Rename for KBC fixed S3 resume issue.
 
 
Previous Fixed:
 
Known Issue:
 
    Notes: 1. How to build BIOS ROM:
                a. Use command BUILDROM K38XxxxA.ROM BY31xxxS.ROM.
                b. Use command COPY /b all.rom + BY3105A.BIN BIOS.WPH.
                c. Use command PHLASH16 /x /pf=osfl /bbl to flash BIOS,
                   because EC updates Boot Block.
           2. This BIOS is not backward compatible to A-Test M/B.
           3. Release 10/100 LAN BIOS only.
 
   ============================================================
 
 EC BIOS Release Note: K38XRELS.TXT 
  ============================================================
DBY31 NS87591 EC BIOS release (Rev. 1.10)                     2004/12/6
 
File name: K38X110A.ROM
Base on   : K38X109A.ROM
Checksum: EB53
 
Fixed: 1. Standby resume fail issue.
Known issue: 
Modified: 
Add function: 
Note:        rename sign on
 
                Release thermal trip algorithm:
======================================================
                 step1   Step2   Step3   Step4   Step5   Step6   
SPEED   (0 RPM) (0)     (2600) (3000) (3500) (3500)  
                ------------------------------------------------------
ON/OFF  ON/OFF  ON/OFF  ON/OFF  ON/OFF  ON/OFF
Fan1:       50/0    55/40   60/45   65/50   83/55   86/65
======================================================
 
                 step1   Step2   Step3   Step4   Step5   Step6   
SPEED (0 RPM) (2400) (2600) (3000) (3600) (3600)  
                ------------------------------------------------------
                 ON/OFF  ON/OFF  ON/OFF  ON/OFF  ON/OFF  ON/OFF
Fan2: 50/0    55/40   60/45   65/50   83/55   86/65
======================================================
PS: 1. step5: EC throttling start, throttling level is 50 %
      2. when 86 degree, system will shutdown for protection
======================================================
 
PS: 1. step5: EC throttling start, throttling level is 50 %
2. when 86 degree, system will shutdown for protection
   ============================================================
 
BIOS.WPH Checksum: A31D
  
If you have any question, please contact me.