ASL: Difference between revisions

Revision as of 19:51, 13 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
accumulator	0A	1 byte	2 cycles
absolute	0E	3 bytes	6 cycles
direct page	06	2 bytes	5 cycles
absolute indexed X	1E	3 bytes	7 cycles
direct page indexed X	16	2 bytes	6 cycles


Flags Clobbered
N	V	M	X	D	I	Z	C
	.	.	.	.	.

ASL (Arithmetic Shift Left) is a 65x instruction that shifts a value by left one bit (multiplication by two). The most significant bit is shifted into the carry flag. The least significant bit becomes a zero.

External Links

Eyes & Lichty page on ASL: https://archive.org/details/0893037893ProgrammingThe65816/page/n453
Labiak page on ASL: https://archive.org/details/Programming_the_65816/page/n127
MCS6500 Manual page on ASL: https://archive.org/details/mos_microcomputers_programming_manual/page/n170
Carr page on ASL: https://archive.org/details/6502UsersManual/page/n260
Leventhal page on ASL: https://archive.org/details/6502-assembly-language-programming/page/n90
undisbeliever on ASL: https://undisbeliever.net/snesdev/65816-opcodes.html#asl-arithmetic-shift-left

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-'''ASL''' (Arithmetic Shift Left) is a 65x instruction that shifts a value by left one bit (multiplication by two).  The most significant bit is shifted into the [[carry flag]].  The least significant bit becomes a zero.
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+'''ASL''' (Arithmetic Shift Left) is a 65x instruction that shifts a value by left one bit (multiplication by two).  The most significant bit is shifted into the [[carry flag]].  The least significant bit becomes a zero.
 === See Also ===