2019-02-07 22:54:06 +01:00
|
|
|
/******************************************************************************
|
|
|
|
|
* 03 RTNCC
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
|
2019-02-08 00:02:55 +01:00
|
|
|
`include "decstates.v"
|
|
|
|
|
|
2019-02-08 11:06:19 +01:00
|
|
|
// `DEC_RTNCC:
|
|
|
|
|
begin
|
2019-02-08 00:02:55 +01:00
|
|
|
Carry <= 0;
|
2019-02-08 11:06:19 +01:00
|
|
|
new_PC <= RSTK[rstk_ptr];
|
2019-02-08 00:02:55 +01:00
|
|
|
RSTK[rstk_ptr] <= 0;
|
|
|
|
|
rstk_ptr <= rstk_ptr - 1;
|
|
|
|
|
bus_load_pc <= 1;
|
2019-02-08 11:06:19 +01:00
|
|
|
// execute_cycle <= 0;
|
2019-02-08 00:02:55 +01:00
|
|
|
decstate <= `DEC_START;
|
|
|
|
|
`ifdef SIM
|
|
|
|
|
$display("%05h RTNCC", saved_PC);
|
|
|
|
|
`endif
|
|
|
|
|
end
|
