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CR80 Hard and Floppy Disks

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⟦1d6c021ca⟧ TextFile

    Length: 397 (0x18d)
    Types: TextFile
    Names: »SETBIT.SRC«

Derivation

└─⟦b678e5579⟧ Bits:30005502 8" CR80 Floppy CR80FD_0031 ( TELECINE BACKUP )
└─⟦b678e5579⟧ Intel_ISIS_II
    └─ ⟦this⟧ »SETBIT.SRC«

TextFile

	PUBLIC	SETBIT\r
\r
SETBIT\r
	IN	A,(C)		;READ STATUS OF OUTPUT PORT\r
	OR	B		;SET ACTUAL BIT(SPECIFIED BY THE PARAMETERS AT SETOBIT)\r
	OUT	(C),A		;WRITE NEW VALUE TO OUTPUT PORT\r
	RET			;\r
\r
\r
	PUBLIC	RESBIT\r
\r
RESBIT\r
	CPL			;ONE'S COMPLEMENT OF REGISTER A(VALUE)\r
	LD	B,A		;\r
	IN	A,(C)		;READ STATUS OF OUTPUT PORT\r
	AND	B		;RESET SPECIFIED BIT\r
	OUT	(C),A		;WRITE NEW VALUE TO OUTPUT PORT\r
	RET\r
\r