This file will explain how to determine which motherboard your system has. You MUST determine this before attempting to upgrade your Flash BIOS. The Goose --------- During boot, the system should show "Phoenix A486 BIOS 1.01", with a line below it which shows "Release 1.0xy", where x is currently 4, 5, or 6 and y is either blank or "S". The 4, 5, and 6 indicate the revision of the BIOS, and the "S" indicates if the SCSI chip option is installed. The footprint of the motherboard is fairly large, and has a large unused quadrant in the right-front corner. When the SCSI chip is added or removed, the Flash BIOS must be updated. Revision 1.04 - Initial release. Revision 1.05 - Fixes "floppy drive failure" messages with Sound Blaster or Sound Blaster Pro installed. Revision 1.06 - Added "VL Bus Mastering" Enable/Disable to CMOS for bus master controllers like the Ultrastor 34F VLB SCSI controller. Note SCSI counterparts have identical revision history. The Gosling ----------- During boot, the system should show "Phoenix A486 BIOS 1.01", with a line below it which shows "452001x-0y", where the x is 6 or 7, and y is 1 or 2. The 7 signifies that the SCSI chip option is installed, and 6 it is not. The 1 and 2 indicate the revision of the BIOS. When the SCSI chip is added or removed, the Flash BIOS must be updated. Revision 4520016-01 - Initial release. Revision 4520016-02 - Changed serial port auto-detection routines to avoid COM4 conflict with S3-based video cards (Diamond Stealth cards) Note SCSI counterparts have identical revision history. The Martin ---------- During boot, the system should show "PheonixBIOS 82C480 82C113 486 BIOS version Q3.07.01" and further down on the screen will appear a number like "452-0018-xx" for non-SCSI and "452-0019-xx" for SCSI where "xx" is the revision number of the Flash BIOS. When the SCSI chip is added or removed, the Flash BIOS must be updated. Non-SCSI Revision 452-0018-01 through 452-0018-06 - Pre-release. Revision 452-0018-07 - Initial release. Revision 452-0018-10 - Service release #1. Revision 452-0018-11 - Allows use of non-parity SIMMs, removes VL-Bus Master setting in CMOS. Revision 452-0018-12 - Adds "Green" power saving features. SCSI Revision 452-0019-01 through 452-0019-06 - Pre-release. Revision 452-0019-07 - Initial release. Revision 452-0019-10 - Service release #1. Revision 452-0019-11 - Allows use of non-parity SIMMs, removes VL-Bus Master setting in CMOS. Revision 452-0019-12 - Adds "Green" power saving features. The Duck (Zeos / DEC and Occidental) ------------------------------------ During boot, the system should show "PheonixBIOS(TM) A486 Version 1.06x" if the company logo below this line is "Zeos International, Ltd." or "PheonixBIOS(TM) A486 Version 1.0x" if the company logo below this line is "Occidental Systems". The "x" will be the revision number of the BIOS. This motherboard can also be identified by the fact that it has the video card built on to the motherboard, with a flat grey ribbon cable connecting the 15 pin video port to the motherboard at J8 which is located on the edge of the motherboard next to the hard drive cable (J7). This is currently our only VESA Local Bus system to use 9 bit SIMM's. This means that it has 8 SIMM slots instead of 4. Revision 1.05(d) - Initial release. Revision 1.06(d) - Service release #1. To this date, all changes made in the Zeos / DEC version of the BIOS have had identical changes made in the Occidental BIOS. BIOS should not be mixed between the two types of systems (Zeos / DEC vs Occidental) as it may not function correctly afterwards. **Note: - No information is currently available on the changes made in BIOS revisions which are listed as "Service release". We hope to include this in a later revision of this document.