eZ80
®
CPU
User Manual
UM007714-0908 Memory Mode Switching
28
Because the CPU core resets to Z80 MEMORY mode, a
JP.LIL
Mmn
is recommended
for use near the beginning of source programs that run primarily in ADL MEMORY
mode.
JP Mmn 1 JP Mmn
assembles to
C3 nn mm MM
The starting program counter is PC[23:0]. Write the
3-byte immediate value {MM, mm, nn}, to
PC[23:0]. The ADL mode bit remains set to 1. The
ending program counter is PC[23:0] = {MM, mm,
nn}.
JP.LIL Mmn 1 JP.LIL Mmn
assembles to
5B C3 nn mm
MM
This operation is the same as the previous
operation. The .LIL extension does not affect
operation when beginning in ADL mode.
JP.SIS mn 1 JP.SIS mn
assembles to
40 C3 nn mm
The starting program counter is PC[23:0]. Write the
2-byte immediate value {mm, nn}, to PC[15:0].
Reset the ADL mode bit to 0. The ending program
counter is {MBASE, PC[15:0]} = {MBASE, mm, nn}.
JP.SIL
Mmn
1 N/A An illegal suffix for this instruction.
JP.LIS mn 1 N/A An illegal suffix for this instruction.
Table 16. JP (rr) Instruction
User Code
ADL
Mode
Assembled
Code Operation
JP (rr) 0 JP (rr)
assembles to
E9 or DD/FD
E9
The starting program counter is {MBASE,
PC[15:0]}. Write the 2-byte value stored in rr[15:0]
to PC[15:0]. The ADL mode bit remains cleared to
0. The ending program counter is {MBASE,
PC[15:0]} = {MBASE, rr[15:0]}.
JP.S (rr) 0 JP.SIS (rr)
assembles to
40 E9 or 40
DD/FD E9
This operation is the same as the previous
operation. The .SIS extension does not affect
operation when beginning in Z80 mode.
JP.L (rr) 0 JP.LIS (rr)
assembles to
49 E9 or
49 DD/FD E9
The starting program counter is {MBASE,
PC[15:0]}. Write the 3-byte value stored in rr[23:0]
to PC[23:0]. Set the ADL mode bit to 1. The ending
program counter is PC[23:0] = rr[23:0].
Table 15. JP Mmn Instruction (Continued)
User Code
ADL
Mode
Assembled
Code Operation
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