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LINK: Difference between revisions
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''' | {| class="wikitable" style="float:right;clear:right;width:50%" | ||
!colspan="8"|Basic Info | |||
|+ | |||
|'''Addressing Mode''' | |||
|'''Opcode''' | |||
|'''Length''' | |||
|'''ROM Speed''' | |||
|'''RAM Speed''' | |||
|'''Cache Speed''' | |||
|+ | |||
|[[Immediate]] | |||
|9n | |||
|1 byte | |||
|3 cycles | |||
|3 cycles | |||
|1 cycle | |||
|} | |||
{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="9"|Flags | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|B | |[[B Flag|B]] | ||
|ALT1 | |[[ALT1]] | ||
|ALT2 | |[[ALT2]] | ||
|O/V | |[[O/V]] | ||
|S | |[[Sign Flag|S]] | ||
|CY | |[[CY]] | ||
|Z | |[[Zero Flag|Z]] | ||
|+ | |+ | ||
|0 | |0 | ||
| Line 20: | Line 36: | ||
|. | |. | ||
|} | |} | ||
'''LINK''' is a [[Super FX]] instruction that stores the sum of R<sub>15</sub> (program counter) and an immediate value (n) into R<sub>11</sub>. The operand n is the low nybble of the opcode and may be any integer from 1~4. | |||
LINK can be used to store a [[return address]] into R<sub>11</sub> when jumping to a subroutine. | |||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | |||
<pre> | |||
LINK #n | |||
</pre> | |||
==== Example ==== | |||
Let: | |||
R<sub>15</sub> : 4368h | |||
After executing the following program: | |||
4368 LINK #4 | |||
4369 IWT R<sub>15</sub>, #74ffh | |||
436C NOP | |||
436B IBT R<sub>1</sub>, #12h | |||
We have: | |||
R<sub>11</sub> = 4369h + 2 = 436bh | |||
=== See Also === | |||
* [[ADD (Super FX)]] | |||
* [[ADC (Super FX)]] | |||
=== External Links === | |||
* Official Nintendo documentation on LINK: 9.48 on [https://archive.org/details/SNESDevManual/book2/page/n224 Page 2-9-68 of Book II] | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category: | [[Category:Super FX]] | ||
Latest revision as of 00:12, 13 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Immediate | 9n | 1 byte | 3 cycles | 3 cycles | 1 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
LINK is a Super FX instruction that stores the sum of R15 (program counter) and an immediate value (n) into R11. The operand n is the low nybble of the opcode and may be any integer from 1~4.
LINK can be used to store a return address into R11 when jumping to a subroutine.
The ALT0 state is restored.
Syntax
LINK #n
Example
Let:
R15 : 4368h
After executing the following program:
4368 LINK #4 4369 IWT R15, #74ffh 436C NOP 436B IBT R1, #12h
We have:
R11 = 4369h + 2 = 436bh
See Also
External Links
- Official Nintendo documentation on LINK: 9.48 on Page 2-9-68 of Book II