TCALL (SPC700): Difference between revisions

Revision as of 04:57, 23 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
implied	01	1 byte	8 cycles
implied	11	1 byte	8 cycles
implied	21	1 byte	8 cycles
implied	31	1 byte	8 cycles
implied	41	1 byte	8 cycles
implied	51	1 byte	8 cycles
implied	61	1 byte	8 cycles
implied	71	1 byte	8 cycles
implied	81	1 byte	8 cycles
implied	91	1 byte	8 cycles
implied	A1	1 byte	8 cycles
implied	B1	1 byte	8 cycles
implied	C1	1 byte	8 cycles
implied	D1	1 byte	8 cycles
implied	E1	1 byte	8 cycles
implied	F1	1 byte	8 cycles


Flags Clobbered
N	V	P	B	H	I	Z	C
.	.	.	.	.	.	.	.

TCALL (Table CALl) is an SPC700 instruction that calls a subroutine. The low byte of the effective address which is called is a function of the high nibble of the opcode. The high byte of the effective address is always $FF.

External Links

Official Nintendo documentation on TCALL: Appendix C-9
anomie's SPC700 doc

@@ Line 8: / Line 8: @@
 |+
 |implied
-|n1
+|01
+|1 byte
+|8 cycles
+|+
+|implied
+|11
+|1 byte
+|8 cycles
+|+
+|implied
+|21
+|1 byte
+|8 cycles
+|+
+|implied
+|31
+|1 byte
+|8 cycles
+|+
+|implied
+|41
+|1 byte
+|8 cycles
+|+
+|implied
+|51
+|1 byte
+|8 cycles
+|+
+|implied
+|61
+|1 byte
+|8 cycles
+|+
+|implied
+|71
+|1 byte
+|8 cycles
+|+
+|implied
+|81
+|1 byte
+|8 cycles
+|+
+|implied
+|91
+|1 byte
+|8 cycles
+|+
+|implied
+|A1
+|1 byte
+|8 cycles
+|+
+|implied
+|B1
+|1 byte
+|8 cycles
+|+
+|implied
+|C1
+|1 byte
+|8 cycles
+|+
+|implied
+|D1
+|1 byte
+|8 cycles
+|+
+|implied
+|E1
+|1 byte
+|8 cycles
+|+
+|implied
+|F1
 |1 byte
 |8 cycles
@@ Line 35: / Line 110: @@
 |}
-'''TCALL''' (Table CALl) is an [[SPC700]] instruction.
+'''TCALL''' (Table CALl) is an [[SPC700]] instruction that calls a subroutine.  The low byte of the effective address which is called is a function of the high nibble of the opcode.  The high byte of the effective address is always $FF.
-The high nibble of the opcode determines the effective address which is called.
 === See Also ===