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- .include #system
-
- ;;; This belongs to the OS package
- ;;; .include #os
- ;;; for the setup macros
-
- ; --------------------------------------------------------------
- ; Find handler HATABS entry or first
- ; free slot:
- ;
- ; Needs:
- ; device ID in A
- ; Returns:
- ; Y contains index
- ; A device ID
- ; Return codes:
- ; C clr (BCC), Z set (BEQ) : empty slot found
- ; C set (BCS), Z set (BEQ) : driver found
- ; C set (BCS), Z clr (BNE) : HATABS full
- ;
- ; BUG: if there are duplicate handlers this will return
- ; the outdated one
- ; --------------------------------------------------------------
- fhatabs ldy #0
- :linst cmp hatabs,y
- beq :done
- clc
- ldx hatabs,y
- beq :done
- iny
- iny
- iny
- cpy #34 ; not 36 we don't want EQ
- bcc :linst
- :done rts
-
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