################################################################################
                            PICO-EHL4
################################################################################
Microcode:
        m_01_90661_00000016.pdb
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Chipset:        Elkhart Lake + F81966
        Microcode:m_01_90661_00000008.PDB

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Note:

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================================================================================
BIOS Name:      ZEHL4M21                (Based on : ZEHL4M20)
Build Date:     09/18/2025
Checksum:       6649h
Sign-on Message:
        PICO-EHL4 R2.1 (ZEHL4M21)(09/18/2025)
Changes:
        1. Update RomImage from Ver.10 to Ver.22

================================================================================
BIOS Name:      ZEHL4M20                (Based on : ZEHL4M19)
Build Date:     06/02/2025
Checksum:       A1CFh
Sign-on Message:
        PICO-EHL4 R2.0 (ZEHL4M20)(06/02/2025)
Changes:
        1. Update Generic SIO module to 16
        2. Fix AAEON build rule checking issue
        3. Update AAEON logo
        4. Update Secure Boot Keys
        5. Update PECI TCC value sync with CPU MSR

================================================================================
BIOS Name:      ZEHL4M19                (Based on : ZEHL4M18)
Build Date:     04/15/2024
Checksum:       6817h
Sign-on Message:
        PICO-EHL4 R1.9 (ZEHL4M19)(04/15/2024)
Changes:
        1. Enable VR CONFIG
        2. Update AMITSE for logofail
        3. update usb module for SA50243

================================================================================
BIOS Name:      ZEHL4M18                (Based on : ZEHL4M17)
Build Date:     01/11/2024
Checksum:       62ECh
Sign-on Message:
        PICO-EHL4 R1.8 (ZEHL4M18)(01/11/2024)
Changes:
        1. Add NT6AP512T32BV-J2I with BID 5

================================================================================
BIOS Name:      ZEHL4M17                (Based on : ZEHL4M16)
Build Date:     10/24/2023
Checksum:       E287h
Sign-on Message:
        PICO-EHL4 R1.7 (ZEHL4M17)(10/24/2023)
Changes:
        1. Correct SMBIOS incorrect
        2. Correct boot to windows USB HDD make S3 auto resume
        3. Fix Boot order priority issue
        4. Disabled VR Config Enable

================================================================================
BIOS Name:      ZEHL4M16                (Based on : ZEHL4M15)
Build Date:     11/22/2022
Checksum:       47EAh
Sign-on Message:
        PICO-EHL4 R1.6 (ZEHL4M16)(11/22/2022)
Changes:
        1. Correct Backlight Mode from BIOS & Application to Windows Slider become black screen
        
================================================================================

BIOS Name:      ZEHL4M15                (Based on : ZEHL4M14)
Build Date:     10/17/2022
Checksum:       9CA3h
Sign-on Message:
        PICO-EHL4 R1.5 (ZEHL4M15)(10/17/2022)
Changes:
        1. Add 1600x1200/1920x1200/1920x1080 with 36B/48B
        2. Enhance FTPM can't set Disabled by Setup Default.
        3. Show PTT Configuration in BIOS Setup Menu

================================================================================
################################################################################
                            PICO-EHL4
################################################################################
Microcode:
        m_01_90661_00000016.pdb
--------------------------------------------------------------------------------
Note:

################################################################################
================================================================================
BIOS Name:      ZEHL4M14                (Based on : ZEHL4M13)
Build Date:     06/24/2022
Checksum:       7627h
Sign-on Message:
        PICO-EHL4 R1.4 (ZEHL4M14)(06/24/2022)
Changes:
        Password
        1. Correct no PassWord to Enter BIOS Setup
        USB
        2. USB 2.0 fine tune
        Boot order
        3. Add Fixedbootorder module

================================================================================
BIOS Name:      ZEHL4M13                (Based on : ZEHL4M12)
Build Date:     06/08/2022
Checksum:       CA43h
Sign-on Message:
        PICO-EHL4 R1.3 (ZEHL4M13)(06/08/2022)
Changes:
1.Show BIOS Robot Setup item 
2.Update PSE FW to 0.20.6.2210_5
3.Update ROM Package to 13
4.Update Microcode to 90661_000000016.pdb
5.Correct BID check function
Notes:Due to update ME configuration, please must use Aaeon BIOS update utility tool to update BIOS.
================================================================================
BIOS Name:      ZEHL4M12                (Based on : ZEHL4M11)
Build Date:     05/23/2022
Checksum:       A270h
Sign-on Message:
        PICO-EHL4 R1.2 (ZEHL4M12)(05/23/2022)
Changes:
        1. Support Ubuntu20.04.2
        2. Support MT53E512M32D1ZW and MT53E1G32D2FW-046
        3. Set NON_FW_ORPHAN_BOOT_OPTIONS_POLICY to ORPHAN_BOOT_OPTIONS_POLICY_DELETE
        
Notes:Due to update ME configuration, please must use Aaeon BIOS update utility tool to update BIOS.
================================================================================
###########################################################################
                                PICO-EHL4
###########################################################################
Chipset:        Elkhart Lake + F81966
Microcode:m_01_90661_00000008.PDB

---------------------------------------------------------------------------
Note:

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==============================================================================
BIOS Name:      ZEHL4M11                
Checksum:       6274h           
Sign-on Message:
                PICO-EHL4 R1.1 (ZEHL4M11)(09/08/2021)

Changes:
1.Fix clear CMOS lose UUID/SN
==============================================================================
BIOS Name:      ZEHL4M10                
Checksum:       AD36h           
Sign-on Message:
                PICO-EHL4 R1.0 (ZEHL4M10)(09/02/2021)

Changes:
1.Set DEFAULT_ENGINEERING_MODE to 0 for BIOS SAP release
2.Hidden DMA1/DMA2 under win10
3.Re-check Can Bus function setting.
4.Correct can't WOL/WOR
5. Correct Set fan mode for set Linear mode 
6.Fix BFPI Get fan mode report error
7.Hidden OTN0 under win10
8.Correct Restore AC Power loss function.
9.Hidden CAN0/CAN1 under win10
10.Fine tune eMMC
11.Enable fTPM
12.Support CANBUS test.
13.Report FAN not support Slope-linear Mode
14.Modify LVDS items
15.Corrected DRAM Type
16.Fix somes mini Pcie wifi card hang on OS
17.Add eMMC 5.1 Controller under BIOS setup menu
18.GPB5/GPB6 level from 1.8V to 3.3V
19.Remove unused BIOS setup menu items
20.Issue system reset when detect EMMC fail (max 3 times)
21.Add eMMC fine tune item under BIOS setup menu
22.Patch N6210 can't wake system by press power button 
==============================================================================
BIOS Name:      ZEHL4M05                
Checksum:       1A16h           
Sign-on Message:
                PICO-EHL4 R0.5 (ZEHL4M05)(06/08/2021)

Changes:
1.Update code base to 5.19_1AWHS_RC1.2.1_012 
==============================================================================
BIOS Name:      ZEHL4M04                
Checksum:       EC63h           
Sign-on Message:
                PICO-EHL4 R0.4 (ZEHL4M04)(05/20/2021)

Changes:
1.Fix press power button 4sec make system shutdown can't power on issue.
2.Fix LVDS can't disabled issue.
3.Disabled GBE0
4.Adjust SATA/mSATA settings under BIOS setup menu
5.Modify Full-MiniCard Slot Function(CN11) help strings.
6.Update code base to 5.19_1AWHS_RC1.2.0_011 for QS sample.
==============================================================================
BIOS Name:      ZEHL4M03                
Checksum:       B176h           
Sign-on Message:
                PICO-EHL4 R0.3 (ZEHL4M03)(02/25/2021)

Changes:
1.Fix Display Aaeon logo abnormal issue.
==============================================================================
BIOS Name:      ZEHL4M02                
Checksum:       5C3Fh           
Sign-on Message:
                PICO-EHL4 R0.2 (ZEHL4M02)(02/03/2021)

Changes:
1.Fix SATA/PCIe select function can't work normal issue.
==============================================================================
BIOS Name:      ZEHL4M01                
Checksum:       1E63h           
Sign-on Message:
                PICO-EHL4 R0.1 (ZEHL4M01)(01/20/2021)

Changes:
1.Setting Display Port B to meet HW design.
2.Enable PSE/CANBUS0/CANBUS1.
3.Fix Restore AC power loss can't work normal issue.
4.Enable PMC_WAKE.
5.Update PTN3460Cfg module.
6.Disabled Low Power S0 Idle Capability.
7.Display Intel(R) SpeedStep(tm) and Intel (VMX) Virtualization Technology under BIOS setup menu.
8.Porting BFPI.
9.Add AaeonRebuildFsp module and Rebuild FSP Always.
10.Modify 2GB/4GB/8GB SPD data.
11.Update code base to 5.19_1AWHS_RC1.1.2_008.
12.SATA/mSATA finetune.
13.Display HDA and DSP under BIOS setup menu.
14.Enable HDA.
15.Reduce boot time caused by buffer reallocation by hardcode AmiStatusCode.
16.Fix beeps from HeciSendwAck().
17.Support PXE.
18.Set PRIMARYDISPLA to IGFX and grayout.
19.Disabled fTPM.
20.Fix Aaeon magic word can't write issue.
21.Remove "Skip Scaning of External Gfx Card" under BIOS setup menu.
22.Correct COM MODE select function.
23.Support EN_USB enabled/disabled function.
===========================================================================
BIOS Name:      ZEHL4M00                
Checksum:       A3DBh           
Sign-on Message:
                PICO-EHL4 R0.0 (ZEHL4M00)(11/24/2020)

Changes:
1.First release.
===========================================================================
