Release Note
====================

Venturis 486 Series System BIOS Update

Version    :  V2.04

Date :  April 14 1998

1. Sign on message:

o "Venturis mmmmmmm Version 2.04" and Copyrights.

          o mmmmmmm : 486SX  25  = 425sx
                             33  = 433sx

                      486SX2 50  = 450s2
                             66  = 466s2

                      486DX  25  = 425dx
                             33  = 433dx

                      486DX2 25  = 450d2
                             33  = 466d2

                      P24D   25  = 450d2 (WB)
                             33  = 466d2 (WB)

                      486DX4 25  = 475d4
                      (P24C) 33  = 4100d4

                      P24T   25  = 463t
                      P24T   33  = 483t

                      AMDX2  25  = 450d2
                      AMDX2  33  = 466d2

                 AMDX4-PLUS  25  = 475d4 (WB)
                 AMDX4-PLUS  33  = 4100d4 (WB)


2. BIOS Function specification:
   .Phoenix BIOS version 4.04 (New BIOS)
   .Flashable ROM BIOS.
   .From 4Mb to 68Mb Memory auto sizing.
   .Write-back cache memory support up to 1Mb.
   .Two buffered serial ports (16550-compatible).
   .ECP/EPP interface support
   .Support local bus IDE H/W and driver.
   .Parity/Non-parity SIMMs modular testing.
   .Two levels of password verifying.
   .On-board VGA supporting.
   .APM1.1 (Green PC features supporting).
   .Plug & Play BIOS extension (CDR) 1.1u.
   .Plug & Play BIOS run time service 1.0a.
   .E_Segment is free (PTL CDR)
   .Combined VGA and System Bios in one EPROM



3. BIOS changes from version 2.03 to 2.04

o Update for year 2000

4. Known Limitations:

o When AHA-1532P floppy port is disabled via jumper, the floppy
  resouce in PnP doesn't removed. It would cause confliction
  to the on board floppy port.

o When use the CMD driver, the feature of 'HDD boot sector write
  protect' in setup can't function normally. The CMD driver must
  be removed before this function can work.

  This is because unlike the system bios, the CMD driver has no
  way to check if the user has selected the 'write protection'
  feature.

o When installing "Windows NT", the "Large Disk Access Mode:" item
   in setup should be set as "DOS".