MR BIOS Revision History
| Version | Description |
|---|---|
| 3.10 | Original Zappa ED,ZP ShareWare release; with new PnP core. |
| 3.11 | n/a |
| 3.12 | Bugfix: PnP core overlapped “manual” setup of PCI interrupts. |
| 3.13 | n/a |
| 3.14 | Force bidirectional parallel-port for Nat’l Semi Super-I/O. |
| 3.15 | n/a |
| 3.16 | Asymmetric 2M dram support (16M/bank, single-sided). |
| 3.17 | Limit ATA-disc “auto” to Mode 3. Mode 4 only avail via “manual”. |
| 3.18 | Update for production Cyrix 6x86. |
| 3.19 | LPT modes: SPP,Bidir,EPP,ECP now user options. (SMC & NSC chips). |
| 3.20 | Upgrade: Add CMD 646 EIDE built-in driver. Upgrade: Longer IDE spindown timer values (1,2,5 –> 2,5,10 min). Upgrade: Provide setup field to disable soundblaster totally. Workaround: De-enhance disk seeks to eliminate Norton8 complaint. Workaround: Fix for Adaptec 2940 bios Ver 1.20 bug. Workaround: Fix for S3 ‘968 32MB pageframe decode bug. Workaround: Fix for Supra PnP Modem bug (drop Adaptec 1542CP fix). |
| 3.21 | Upgrade: Add aggressive “55nS” memory-type option. Bugfix: Obscure bug in “manual” PCI-Int Setup affects mapping over bridge of Ints B,C,D (not A) for a few non-Zappa’s. |
| 3.22 | Workaround: Fix for Adaptec 2940 bios Ver 1.21 warm-boot bug. Workaround: Fix for nVidia/SGS VGA, replicated PCI ROM register. Workaround: Fix for Holtek asic 8042 bug. Workaround: Move Pnp-Data-Read port to avoid gameport decode bug. |
| 3.23 | Workaround: Apply v3.22 fix to all Adaptec PCI devices. LPT modes: SPP,Bidir,EPP,ECP options for Winbond Super I/O too. Upgrade: Add “CPU-Pipeline” on/off option (for debug purposes). Upgrade: RAID-0 disk striping option, interleave 2-8 IDE drives. |
| 3.24 | Workaround: Disable CPU Pipelining during POST. Upgrade: Higher performance for Mode4 IDE drives. |
| 3.25 | Fix: Timing problem with certain 512K pipeline cache modules. Fix: Incompatibility with WD 719X SCSI controllers. |
| 3.26 | Workaround: Aha2940 PCI I/O alignment for Chinese OS/2 (TWarp). Reduced binary bios image to 92K. Changed flash loader, now does not clear cmos century byte (ref: NDD95). |
| 3.27 | Workaround: PnP issues with Crystal soundblaster. Workaround: COM4 port usage by ATI video. Update: Aggressive CMOS-default memory settings. Update: Roundup CPU MHz display (cosmetic). Update: Display dram config in Chipset setup screen. Update: Performance tweaks for 6x86 CPU. |
| 3.28 | Update: Deleting on-board COM/LPT ports in “Ports” setup utility now fully disables them. Fix: 6x86 cacheable range for non-binary memory sizes. |
| 3.29 | EV2,ATX,Atlantis: Fix for Crystal Audio + Win95. UMC/ITE 8669F Super I/O chip: Fix PnP support. |
| 3.30 | Display MR BIOS logo on powerup screen. Show PnP serial and parallel ports in setup utility. Longer IDE spindown timer values (2,5,10 –> 5,10,20 min). |
| 3.31 | Update: Performance tweaks for Cyrix CPU. |
| 3.40 | Changed serial/parallel port handling to allow on board. COM/LPT ports to be configured for specific I/O address. Setup screen also displays com/lpt irq. Added PnP message display at code boot when 1 or more PnP. ISA cards are found: PnP Card Initalization complete! Added support for USB to Intel Triton VX/HX chipset. added option USB port = Enable/Disable to chipset screen in setup. the usb support added should support usb devices with windows95. |
| 3.41 | Update: Add support for AMD K5 PR166, and K6. Update: Add support for Intel Tuscon and latest Advanced/ML motherboards. Requires MRFLASH Ver 2.00 or greater. Update: Upgrade support for UMC 8669 superio. Update: Configure PCI Video Adapters on other side of PCI to PCI bridge. Update: Add support for LGS Prime 3B/3C superio. Fix: Changes to bios for Intel motherboards containing onboard PCI video to properly configure external video as primary video Fix: Fixed problem with MR BIOS not recognizing slave IDE device when attaching two hard drives greater than 1GB as master and slave. Fixed by adding option “IDE Slave Detection” to ATA-Disc menu in bios setup. Fix: Change supported memory ceiling for Triton HX motherboards from 128MB max to 512MB. Fix: Fixed problem which caused poor bus master dma performance. Fix: Fixed problem with PnP modems being configured to same IRQ resources as on-board COM ports. |
| 3.42 | Upgrade: Add Millenium support. Upgrade: Add support for IBM M2 and Cyrix 6x86MX CPU’s. Update: Performance enhancements with AMD K5 & K6 CPUs. Fix: Fixed problem with disabling both on-board IDE’s controllers with Windows 95. Fix: AMD-K5/PR200 incorrectly identified as 586SX. Fix: Fixed problem with no video after boot when 6 or more PCI devices installed. Fix: Fixed problem with certain 4MB Fast Page Mode memory not identified properly on motherboards with Triton VX chipset. Fix: Do not allocate IRQ to USB device if disabled. Fix: Drive field not erased properly in ATA-DISC BIOS Setup. Fix: PnP configuration problem with ESS 1868 sound card. |
| 3.43 | Upgrade: Added Ultra DMA/33 support to Triton TX chipset Fix: Problem with unconfigured COM/LPT when CMOS corrupted. Fix: Boot sequence defaulted to SCSI when CMOS corrupted. Fix: Boot problem with PCI adapters containing executable option ROMs. Fix: IDE PIO Mode 4 did not work properly. Fix: Intemittant Gate A20 disabled test failures. |
| 3.44 | Upgrade: Added support for IDT Winchip C6 CPU Upgrade: Added Advanced BIOS Setup option to all Intel Triton versions. Contains options to reserve IRQ’s for legacy adapters and option to disable PnP device configuration. Upgrade: Make IRQ12 available for PCI if no PS/2 mouse attached. Fix: Problem with chipset CMOS settings not working with ALI M6117 chipset. Fix: Increase memory ceiling from 128MB to 256MB on Triton TX |
| 3.45 | Upgrade: Added support for AMD K6-2 Upgrade: Added suport for additional Winbond 977 superio’s. Upgrade: Added support for SMC 67X superio. Fix: Problem with PS/2 mouse not working with Winbond 877 superio. |
| 3.46 | Fix: Problem which caused L2 cache to not be enabled on some motherboards used with some AMD CPU’s. Fix: Problem which caused hard disks containing odd number of heads (e.g. 15) to not boot. |