JSRE - Revision history

Mr z: Protected "JSRE" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

2010-12-04T08:44:32Z

Protected "JSRE" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

Pingaso at 21:31, 11 January 2005

2005-01-11T21:31:18Z

Pingaso at 20:36, 11 January 2005

2005-01-11T20:36:57Z

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The Jump to Subroutine and Enable Interrupts opcode (JSRE) is a three-decle opcode that is a part of the [[Jump]] family of opcodes. The Jump to Subroutine and Enable Interrupts causes the [[CP1610]] to set the [[Interrupt Enable Flag]], store the return address in the register specified, and then unconditionally jump to the address specified in the following parameters. 

Format - Decle #1 Format - Decle #2 Format - Decle #3
0000:0000:0000:0100 0000:00rr:aaaa:aa01 0000:00aa:aaaa:aaaa 
where: 
rr indicates the register into which to store the return address
such that:
rr == 00 indicates to store return address in register R4
rr == 01 indicates register R5
rr == 10 indicates register R6
rr == 11 indicates that the [[CP1610]] should not store the
return address, signaling an [[J|Unconditional Jump]]
rather than a Jump to Subrouting (JSR) 
aaaaaaaaaaaaaaaa indicates the address to where the [[CP1610]] should Jump

Note that if the address stored in the specified register is the address that is exactly 3 addresses after the start of the Jump opcode, so that the subroutine will return to the next opcode immediately following Jump opcode. 

See the [[Jump]] opcode family documentation for more information.

← Older revision		Revision as of 21:31, 11 January 2005
Line 1:		Line 1:
		+	[[Category:CP1610]]
		+	<table border>
		+	<tr><td>Instruction Name</td><td>Jump to Subroutine and Enable Interrupts</td></tr>
		+	<tr><td>Mnemonics</td><td>JSRE</td></tr>
		+	<tr><td>CP1610 Clock Cycles</td><td>12</td></tr>
		+	<tr><td>Interruptible</td><td>Yes</td></tr>
		+	<tr><td>Opcode Range</td><td>$0004</td></tr>
		+	</table><br/>
	The Jump to Subroutine and Enable Interrupts opcode (JSRE) is a three-decle opcode that is a part of the [[Jump]] family of opcodes. The Jump to Subroutine and Enable Interrupts causes the [[CP1610]] to set the [[Interrupt Enable Flag]], store the return address in the register specified, and then unconditionally jump to the address specified in the following parameters.<br/>		The Jump to Subroutine and Enable Interrupts opcode (JSRE) is a three-decle opcode that is a part of the [[Jump]] family of opcodes. The Jump to Subroutine and Enable Interrupts causes the [[CP1610]] to set the [[Interrupt Enable Flag]], store the return address in the register specified, and then unconditionally jump to the address specified in the following parameters.<br/>

← Older revision	Revision as of 08:44, 4 December 2010
(No difference)