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阅读：1716回复：3
谁告诉我这几个CYPRESS指令的意思？
ASL，JACC ，CMP，CPL，INDEX
谁能帮我详细解释一下，多谢了！ |
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沙发#
发布于：2004-08-10 21:54
asl----累加器逻辑左移，最高位入CF位
jacc----无条件跳到acc+k cmp----累加器－目标，改变CF,ZF位，累加器不变 cpl----累加器内容取反 index---累加器＋地址－－－》acc，即取表格 |
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板凳#
发布于：2005-07-30 17:18
zoro
还有更多的CYpress指令说明吗? 像:RLC RRC EI HALT DI IORD IOWR 等指令都不太清楚. 请教一下 :) 方便的话,可以发到我邮箱:etien@mdisk.com.cn 多谢! |
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地板#
发布于：2005-07-31 09:26
RLC:Shifts all bits of the accumulator one place to the left. Bit 0 is loaded with the carry flag.
The most significant bit of the accumulator is loaded into the carry flag. RRC:Shifts all bits of the accumulator one place to the right. The carry flag is loaded into the most significant bit of the accumulator, bit 7. Bit 0 of the accumulator is loaded into the Carry flag. EI:Enable interrupt HALT: Halts execution of the processor core until the occurrence of a reset - Watchdog, POR or USB DI:Disable interrupt IORD:Places the contents of IO location indexed the by address operand into the accumulator. IOWR:Place the contents of the accumulator into the IO location indexed by the address operand. |
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