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| Release | Date | Changes |
| 1-01-00 | 12/10/94 | 'Posted' PCI memory writes have been disabled to fix a problem encountered with 'Winstone 94' general protection faults. |
| 4.00 PN 154278SW checksum |
24/10/94 3F00 |
This introduces the initial release, at version 4.00, of the Apricot Ruby BIOS. |
| 4-01 | 9/12/94 | Change to fix low temperature cold boot
problem highlighted during Factory MPP. Change to fix warm boot delay highlighted during Factory MPP. |
| 4.02.01 BETA PN 154278SW checksum |
24/1/95 0F00 |
Code to reset the Feature Card Ethernet
controller has been added. The Power management logic has been modified to support both P5 and P54C (Jade & Ruby) motherboards. The AIS BIOS function ‘Return machine type’ has been modified to support both P5 and P54C (Jade & Ruby) motherboards. |
| 4.02.02 BETA PN 154278SW checksum |
9/12/95 F400 |
‘CTL ALT DEL’ may have caused
the parallel port to not operate in ECP mode. This has been resolved. ‘SETUP’ display of parallel port did not reflect current CMOS settings. This has been fixed. Windows 95 and Windows NT were returning inconsistent results for memory configurations above 64Mb. This has been resolved. There was no ‘SETUP’ option for enabling PCI VGA palette snooping. This has now been added. There was no build version or date being displayed at signon. This has now been added. There was no ‘SETUP’ option for enabling PCI posted memory writes. This has now been added. Certain SIMMs were producing un-reliable system operation. This was caused by marginal CAS timings and has now been fixed. The ‘SETUP’ key F1 was not being recognised when a Feature card was fitted. This has now been resolved. Certain HDU types (Caviar) were failing. This has been fixed. ‘Overdrive’ processors did not work correctly. This has been fixed. |
| 4-02-03 BETA |
15/2/95 | The part number has been changed. The new Cirrus Logic video BIOS (v1.22) has been included. The video ‘dot clock’ frequency for 800x600x256 resolution (mode 5C) was incorrect. This has now been fixed. |
| 4-02-04 BETA |
27/2/95 | A new Cirrus Logic video BIOS has been
included to fix problems with systems hanging. The date & time were not always being displayed on a warm boot. This has now been resolved. |
| 4-02-05 BETA |
21/3/95 | DOS/Windows and Novell Netware only detected 16Mb of RAM for configurations of 16Mb to 64Mb. This has now been resolved. |
| 4-02-06 BETA |
31/3/95 | The correct processor speed is now displayed by ‘SETUP’ for 75Mhz & 120Mhz Pentiums. |
| 4-02 | 31/3/95 | This release is functionally unchanged from 4.02.06 BETA. |
| 4-03-01 BETA |
21/4/95 | The PCI IDE controller was not running
in '32 performance' mode. This has now been resolved. 'Legacy' ISA devices were not reserving resources correctly. This has been fixed. A system node existed for PCI IDE, causing it to be 'claimed' twice by Windows 95. This has now been fixed. The 'AIS' interface was incorrectly identifying some motherboards. This is now fixed. If 'POST' detected an extended memory size mismatch, the error message was corrupted. This has now been resolved. Various combinations of SIMM size could cause memory sizing errors. This has now been fixed. Power management features were not being explicitly disabled on soft reset. This has now been fixed. PCI cards were being allocated IRQ14 & IRQ15. This has now been fixed. 'PNP' was returning an incorrect 'structure' version number. This has now been fixed. The PCI IDE & GD5434 were not claiming resource from the 'PNP' pool. This has now been fixed. |
| 4-03-02 BETA |
1/5/95 | The AIS Manager motherboard ID was
incorrect. This has now been resolved. Video modes 58, 65 & 67 (hex) had incorrect timings. This has now been fixed. The Symphony PCI controller resources were still being used by other PCI cards. This has now been resolved. Memory sizing was failing for single sided SIMMs. This has been fixed. |
| 4-03-03 BETA |
19/5/95 | The PNP settings for ISA IDE were not
consistent with the primary/secondary settings, also a duplicate entry was found by
Windows 95. This has been resolved. The power management defaults were incorrect. This has been resolved. The video display type was not always 'communicated' to the video controller chip correctly. This may be a Cirrus Logic silicon issue, (they are currently investigating it), and a solution has been provided. |
| 4-03 | 5/6/95 | This release is functionally unchanged from the previous version, 4-03-03 BETA |
| 4-04-01 BETA |
9/6/95 | Version 1.23 of the Cirrus Logic video
BIOS has now been included. The Cirrus Logic signon has now been disabled. A fix for the 800 x 600 x 256 @ 72Hz problem has been provided. |
| 4-04 | 26/6/95 | This release is functionally unchanged from 4-04-01 BETA |
| 4-05-01 BETA |
26/6/95 | Chipset programming has been modified to
address a problem raised by ISEC. PRF-JADE-0011, occasional hanging during warm boot. This was caused by SMI being enabled momentarily during warm boot, before the handler was enabled. Noise on the SMI input would cause a jump to the non-existent handler and the machine would hang. |
| 4-05-02 BETA |
18/7/95 | The power-on volume setting for the PC speaker mixer feed into Soundblaster cards was very loud. This has now resolved. |
| 4-05 | 28/7/95 | This release is functionally unchanged from 4-05-02 BETA. |
| 4-06-01 BETA |
25/10/95 | Gray out the option in setup for PCI posted writes when detecting VLSI 590 B0 step silicon. |
| 4-06 | 30/10/95 | As revision B2 '591 silicon will no longer be available there exists a requirement to ship machines fitted with B0 silicon. However, the rev. B0 silicon does not support 'Posted PCI write' cycles, so the 'SETUP' logic has been altered to sense the silicon revision and 'grey out' the option for 'Posted PCI writes' if it detects B0 silicon. |
| 4-07-01 BETA |
13/12/95 | IPR1424 - Matrox cards were causing screen corruption under OS/2 Warp. This was caused by the cards PCI settings not being programmed correctly, a result of a ‘fix’ for AT&T to enable ‘MIRO’ video cards to function. This ‘fix’ has now been disabled. |
| 4-07 Release Checksum PN 154723SW |
29/01/98 9600 |
This BIOS has been released to provide year 2000 compliance. |
