CMOS Memory Map BIOS Central. Below is a typical CMOS RAM. AT PC.   Under a 1. ISA compatible CMOS. Fh is the. ISA configuration data, 1. Fh is the BIOS specific configuration. Fh is the ESCD Extended System Configuration. Data. Offset. Hex. Offset. Dec. Field. Size. Function. 00h. RTC. seconds.   Contains the seconds value of current time. RTC. seconds alarm. Contains the seconds value for the RTC. RTC. minutes.   Contains the minutes value of the current. RTC. minutes alarm. Contains the minutes value for the RTC. RTC. hours.   Contains the hours value of the current time. RTC. hours alarm. Contains the hours value for the RTC alarm. RTC. day of week. Contains the current day of the week. RTC. date day.   Contains day value of current date. RTC. date month.   Contains the month value of current date. RTC. date year.   Contains the year value of current date. Ah. 10. 1. byte. Status. Register A     Bit 7 Update. Date and time can be read, 1 Time update in progress   Bits 6 4. Time frequency divider 0. KHz   Bits 3 0. Rate selection frequency 0. KHz square wave frequency0. Bh. 11. 1. byte. Status. Register B   Bit 7 Clock. Update normally, 1 Abort update in progress   Bit 6 Periodic. Disable interrupt default, 1 Enable interrupt. Product cannot be used to upgrade your system, it requires a clean installation of OS. In order to install the software on your PC, please follow the instructions here. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. Bit 5 Alarm. interrupt 0 Disable interrupt default, 1 Enable interrupt   Bit 4 Update. Disable interrupt default, 1 Enable interrupt   Bit 3 Status. A square wave frequency 0 Disable square wave default. Enable square wave   Bit 2 2. Bit 1 Daylight. Disable daylight savings default, 1 Enable. Eurosoft Pc Check 7' title='Eurosoft Pc Check 7' />Ch. Status. Register C Read only flags indicating system status conditions   Bit 7 IRQF. Bit 6 PF. flag   Bit 5 AF. Bit 4 UF. flag   Bits 3 0. Reserved. 0Dh. 13. Status. Register D Valid CMOS RAM flag on bit 7 battery condition. Bit 7 Valid. CMOS RAM flag 0 CMOS battery dead, 1 CMOS battery power good   Bit 6 0. Official Capcom site. Includes developer blogs, forums, social features and community news. Eurosoft Pc Check 7' title='Eurosoft Pc Check 7' />Reserved. Eh. 14. Diagnostic. Status   Bit 7 Real. CMOS has not lost power, 1 CMOS has. Bit 6 CMOS. checksum status 0 Checksum is good, 1 Checksum is bad   Bit 5 POST. Configuration information. Configuration information in invalid   Bit 4 Memory. POST 0 POST memory equals configuration. POST memory not equal to configuration   Bit 3 Fixed. Initialization good, 1 Initialization. Bit 2 CMOS. time status indicator 0 Time is valid, 1 Time is invalid   Bit 1 0. Reserved. 0Fh. 15. CMOS. Shutdown Status   0. Power. on or soft reset   0. Memory. size pass   0. Memory. test pass   0. Memory. test fail   0. POST. complete boot system   0. JMP. double word pointer with EOI   0. Protected. mode tests pass   0. Memory. size fail   0. Int. 1. 5h block move   0. Ah JMP. double word pointer without EOI   0. Bh Used. by 8. 03. Floppy. Disk Drive Types   Bits 7 4. Drive 0 type   Bits 3 0. Drive 1 type   0. None   0. 00. 1 3. KB   0. 01. 0 1. MB   0. KB   0. 10. 0 1. MB1. System. Configuration Settings   Bit 7 Mouse. Bit 6 Memory. test above 1. MB disableenable   Bit 5 Memory. Bit 4 Memory. parity error check disableenable   Bit 3 Setup. Bit 2 Hard. disk type 4. RAM area 0 3. 00h or upper 1. KB of DOS area   Bit 1 Wait. F1 if any error message disableenable   Bit 0 System. Numlock offon1. Hard. Disk Types   Bits 7 4. Hard disk 0 type   Bits 3 0. Hard disk 1 type   0. No. drive installed   0. Type. 1 installed   1. Type. 1. 4 installed   1. Type. 1. 6 4. 7 defined later in 1. Typematic. Parameters   Bit 7 typematic. Bit 6 5. typematic rate delay   Bit 4 2. Typematic rate. 14h. Installed. Equipment   Bits 7 6. Number of floppy disks 0. Bits 5 4. Primary display 0. Use display adapter BIOS, 0. CGA 4. 0 column. 1. CGA 8. 0 column, 1. Monochrome Display Adapter   Bit 3 Display. Bit 2 Keyboard. Bit 1 math. Bit 0 Always. Base. Memory Low Order Byte Least significant byte. Base. Memory High Order Byte Most significant byte. Extended. Memory Low Order Byte Least significant byte. Extended. Memory High Order Byte Most significant byte. Hard. Disk 0 Extended Type 1. Eh Type 1. 6 to 4. Ah. 26. 1. byte. Hard. Disk 1 Extended Type 1. Eh Type 1. 6 to 4. Bh. 27. 1. byte. User. Defined Drive C Number of cylinders least significant. Ch. 28. 1. byte. User. Defined Drive C Number of cylinders most significant byte. Dh. 29. 1. byte. User. Defined Drive C Number of heads. Eh. 30. 1. byte. User. Defined Drive C Write precomp cylinder least significant. Fh. 31. 1. byte. User. Defined Drive C Write precomp cylinder most significant. User. Defined Drive C Control byte. User. Defined Drive C Landing zone least significant byte. User. Defined Drive C Landing zone most significant byte. User. Defined Drive C Number of sectors. User. Defined Drive D Number of cylinders least significant. User. defined Drive D Number of cylinders most significant byte. User. Defined Drive D Number of heads. User. Defined Drive D Write precomp cylinder least significant. User. Defined Drive D Write precomp cylinder most significant. User. Defined Drive D Control byte. Ah. 42. 1. byte. User. Defined Drive D Landing zone least significant byte. Bh. 43. 1. byte. User. Defined Drive D Landing zone most significant byte. Ch. 44. 1. byte. User. Defined Drive D Number of sectors. Dh. 45. 1. byte. System. Operational Flags   Bit 7 Weitek. Bit 6 Floppy. drive seek at boot enabledisable   Bit 5 System. Bit 4 System. boot CPU speed highlow   Bit 3 External. Bit 2 Internal. Bit 1 Fast. A2. Bit 0 Turbo. switch function enabledisable. Eh. 46. 1. byte. CMOS. Checksum High Order Byte Most significant byte. Fh. 47. 1. byte. CMOS. Checksum Low Order Byte Least significant byte. Actual. Extended Memory Low Order Byte Least significant byte. Actual. Extended Memory High Order Byte Most significant byte. Century. Date BCD Value for century of current date. POST. Information Flags   Bit 7 BIOS. KB1. 28. KB   Bit 6 1. Bit 0 POST. cache test passedfailed. BIOS. and Shadow Option Flags   Bit 7 Boot. Bit 6 Password. Bit 5 Adapter. ROM shadow C8. KB disabledenabled   Bit 4 Adapter. ROM shadow CC0. 0h 1. KB disabledenabled   Bit 3 Adapter. ROM shadow D0. 00h 1. KB disabledenabled   Bit 2 Adapter. ROM shadow D4. 00h 1. KB disabledenabled   Bit 1 Adapter. ROM shadow D8. 00h 1. KB disabledenabled   Bit 0 Adapter. ROM shadow DC0. 0h 1. KB disabledenabled. BIOS. and Shadow Option Flags   Bit 7 Adapter. ROM shadow E0. 00h 1. KB disabledenabled   Bit 6 Adapter. ROM shadow E4. 00h 1. KB disabledenabled   Bit 5 Adapter. ROM shadow E8. 00h 1. Encantadora De Bebes Livro Rosa Pdf Reader. KB disabledenabled   Bit 4 Adapter. ROM shadow EC0. 0h 1. KB disabledenabled   Bit 3 System. ROM shadow F0. 00h 1. KB disabledenabled   Bit 2 Video. ROM shadow C0. 00h 1. KB disabledenabled   Bit 1 Video. ROM shadow C4. 00h 1. KB disabledenabled   Bit 0 Numeric. Chipset. Specific Information. Password. Seed and Color Option    Bit 7 4. Password seed do not change   Bit 3 0. Setup screen color palette   0. White. on black   7. Black. on white   1. White. on blue   2. Black. on green   3. Black. on turquoise   4. White. on red   5. White. on magenta   6. Black. on brown. 38h 3dh. Encrypted. Password do not change3. Eh. 62. 1. byte. Extended. CMOS Checksum Most significant byte. Fh. 63. 1. byte. Extended. CMOS Checksum Least significant byte. Model. Number Byte. Serial Number Byte. Serial Number Byte. Serial Number Byte. Serial Number Byte.