SurePOS 500 4846-XX5 Technical Reference
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Memory Location 40:96h
This word contains the extended keyboard status.
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Memory Location 40:72h
This word contains the soft reset flag.
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Int 10h – Video
This interrupt is supported by the video ROM.
Int 11h - Equipment Determination
Returns the data at memory location 40:10h.
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Memory Location 40:10h
This word contains the equipment list.
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Int 12h - Base Memory Size
Returns the value at memory location 40:13h.
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Memory Location 40:13h
This word contains the amount of memory up to 640 KB. This count will often be less than 640 KB due to NIC
ROM bootloaders.
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Int 13h - HDD and Floppy Diskette Services
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Int 14h - Serial Communication Services
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Int 15h - System Services
Sub functions are those defined by the IBM Personal System/2 and Personal Computer BIOS Interface Technical
Reference manual. Additional sub function support is OEM dependent.
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Int 16h - Keyboard Services
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Int 1Ah - System-Timer Services, PCI BIOS
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Int 1Bh – CTRL+Break Handler
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Int 1Ch - Periodic Timer Interrupt
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Int 1Dh - Video Parameter Table
Set by the video BIOS
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Int 1Eh - Floppy Diskette Drive Parameters
Points to an 11-byte data structure
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Int 1Fh - Video Graphics Characters
Set by the video BIOS
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Int 23h - CTRL+C, CTRL+Break Handler
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Int 41h - HDD C: Drive Parameters
Points to a 16-byte data structure for drive C:
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Int 46h - HDD D: Drive Parameters
Points to a 16-byte data structure for drive D:
3.5 Fixed BIOS Entry Points
The fixed entry points in F000:xxxx must be supported for traditional reasons. The table below lists the fixed BIOS
entry points.
Location Description
F000:E05Bh
POST Entry Point
F000:E2C3h
NMI Entry Point
F000:E6F2h
Int 19h Entry Point
F000:E6F5h
Configuration Data Table
F000:E729h
Baud Rate Generator Table
F000:E739h
Int 14h Entry Point
F000:E82Eh
Int 16h Entry Point
F000:E987h
Int 09h Entry Point
F000:EC59h
Int 13h Floppy Entry Point
F000:EF57h
Int 0Eh Entry Point
F000:EFC7h
Floppy Disk Controller Parameter Table
F000:EFD2h
Compatibility for printer Int 17h