Venturis 4xxx BIOS Release Notes V2.00 (Trio 32) Creation Date 23-Jun-95 Code Base PhoenixBIOS 4.04 Venturis BIOS Version 1.00 Checksum C_ENG_32.ROM : 13FBH C_ENG_32.HEX : 13FBH C_FRE_32.ROM : 09FBH C_FRE_32.HEX : 09FBH C_GER_32.ROM : 82FBH C_GER_32.HEX : 82FBH C_ITA_32.ROM : EAFBH C_ITA_32.HEX : EAFBH C_SPA_32.ROM : 3CFBH C_SPA_32.HEX : 3CFBH Signon o "Venturis mmmmmmm Version 2.00" 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) 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. .Supports On-board VGA. .APM1.1 (supports Green PC features). .Plug & Play BIOS extension (CDR) 1.1u. .Plug & Play BIOS run time service 1.0a. .E_Segment is free (PTL CDR) .Combine VGA Trio32 Bios into System Bios in one EPROM BIOS Changes o Fixed: Under softbanner setup, if the user skips the first line and just keys in the second line, the softbanner will be ineffective. o Fixed: With keyboard controller V1.25, setting the softbanner at setup will cause the flash rom to be destroyed. o Fixed: Warm boot in setup will cause the system to enter setup automatically. o Clear Hot Key 2 - Hot Key 6 o Changed the default value of "Diskette Access" in setup from Supervisor to User. o Changed the 25MHz, PIO3 mode value from 22 to 31. o Added the value table of CMD_REG for 40MHz. o Fixed the two copies of VGA resource in ICU if onboard VGA disabled. o Added support for the AMDX4-PLUS CPU (100MHz). o Added the feature of PTL CDR to replace the Intel extension PNP to free E Segment. o Combined the VGA Bios ( Trio32 ) into the SYSTEM Bios. o Fixed the problem that Win 95 could not auto detect the PNP cards. o Fixed the problem that when the "AT bus space" in set to anything other than "disable", HIMEM.SYS still can not issue ERROR message. o Implemented "Big memory" ( > 64 MB ). o Fixed the problem that when the C drive is set to "none install" in setup, INT 19 will not show "Operating system not found" but some unreadable message. o Fixed the problem that when PM is disabled in setup, clicking the "suspend" box in Win 95 will cause the system to hang. o In PM initialization, set sis_reg_66 from default value 05h to e5h, sis_reg_67 from default value 21 to efh, let just IRQ 1, 3 4, 12 is enabled for System Event Timer reload. o Support the Mono. card to have the mono. monitor displayed when set jumper 19 to "VGA disable". o Support IBM3270 card.