Cmos Functions

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