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- ;
- ; CMOS.INC
- ;
- ; CMOS equates
- ;
-
- ; To enable NMI, write to the command port @CMOS_ENANMI
- ; To disable NMI, write to the command port @CMOS_DISNMI
- ; Be sure to read from @CMOS_DATA afterwards to complete the cycle
- ; The low-order seven bits of the byte select a CMOS register
-
- @CMOS_CMD equ 70h ; Command register
- @CMOS_DATA equ 71h ; Data register
-
- @CMOS_NMIOFF equ 80h ; Disable NMI
- @CMOS_SHUT equ 0Fh ; Register to access shutdown byte
- @CMOS_ENANMI equ 0Dh ; Register to enable NMI
- @CMOS_DISNMI equ @CMOS_ENANMI or @CMOS_NMIOFF ; Register to disable NMI
- @CMOS_EXTLO equ 17h ; Extended memory size, low byte
- @CMOS_EXTHI equ 18h ; ... high ...
- @CMOS_CHKHI equ 2Eh ; Extended memory size, high byte
- @CMOS_CHKLO equ 2Fh ; ... low ...
-