Cmos Functions

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Joshua Riek edited this page Feb 17, 2020 · 1 revision

cmosRead

Read the contents from a chosen CMOS register

IN: AL = CMOS address to read
OUT: AH = Contents from read

cmosWrite

Write to the chosen CMOS register

IN: AL, AH = CMOS address to write, Value to write
OUT: Nothing

cmosReadDate

Get the system date from the CMOS

IN: Nothing
OUT: AL, CX, DH, DL = Week, Year, Month, Day

cmosReadTime

Get the system time from the CMOS

IN: Nothing
OUT: CH, CL, DH = Hour, Minute, Second

cmosDelay

Use the CMOS to wait a period of time in seconds

IN: CX = Seconds to wait for
OUT: Nothing

bcd

Convert a value into a binary-coded decimal (BCD)

IN: AL = Number to convert
OUT: AL = Converted number

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