Differences

This shows you the differences between two versions of the page.

--- sd:isa [2026/05/13 15:11] – appledog
+++ sd:isa [2026/06/10 04:36] (current) – appledog
@@ Line 38: / Line 38: @@
 | 67 | JC      | JC @label     | Jump if carry set   | None |
 | 68 | JNC     | JNC @label    | Jump if carry clear | None |
-| 84 | CALL    | CALL @label   | Call subroutine (push IP, jump) | |
+| 84 | [[#call|CALL]]    | CALL @label   | Call subroutine (push IP, jump) | |
 | 85 | RET     |               | Return from subroutine (pop IP) | |
 | 86 | INT     | INT 0x10      | Software interrupt | |
@@ Line 193: / Line 193: @@
 == Dictionary
 here you will find information about each opcode.
+<wrap #call /><wrap #call /><wrap #callr /><wrap #callr />
+**''CALL addr / CALL reg / CALLR reg''**\\ CALL pushes the return address of the next instruction and jumps to the location.
+The CALLR instruction takes a register operand and dispatches based on the register's size: 16-bit registers use the current bank combined with a 16-bit address, 8-bit registers work similarly, and 24-bit registers provide a full 24-bit address. For function pointers stored in 32-bit register pairs like AB, CALLR will convert the address to 24 bits by discarding the high byte.
 <wrap #sez /><wrap #sen /><wrap #sec /><wrap #sev />