diff options
Diffstat (limited to 'sim/m68hc11/m68hc11_sim.c')
| -rw-r--r-- | sim/m68hc11/m68hc11_sim.c | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/sim/m68hc11/m68hc11_sim.c b/sim/m68hc11/m68hc11_sim.c index d9fb807..fe5985f 100644 --- a/sim/m68hc11/m68hc11_sim.c +++ b/sim/m68hc11/m68hc11_sim.c @@ -1,6 +1,6 @@ /* m6811_cpu.c -- 68HC11&68HC12 CPU Emulation Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. - Written by Stephane Carrez (stcarrez@worldnet.fr) + Written by Stephane Carrez (stcarrez@nerim.fr) This file is part of GDB, GAS, and the GNU binutils. @@ -907,6 +907,60 @@ cpu_special (sim_cpu *cpu, enum M6811_Special special) } break; + case M6812_CALL: + { + uint8 page; + uint16 addr; + + addr = cpu_fetch16 (cpu); + page = cpu_fetch8 (cpu); + + cpu_m68hc12_push_uint16 (cpu, cpu_get_pc (cpu)); + cpu_m68hc12_push_uint8 (cpu, cpu_get_page (cpu)); + + cpu_set_page (cpu, page); + cpu_set_pc (cpu, addr); + } + break; + + case M6812_CALL_INDIRECT: + { + uint8 code; + uint16 addr; + uint8 page; + + code = memory_read8 (cpu, cpu_get_pc (cpu)); + /* Indirect addressing call has the page specified in the + memory location pointed to by the address. */ + if ((code & 0xE3) == 0xE3) + { + addr = cpu_get_indexed_operand_addr (cpu, 0); + page = memory_read8 (cpu, addr + 2); + addr = memory_read16 (cpu, addr); + } + else + { + /* Otherwise, page is in the opcode. */ + addr = cpu_get_indexed_operand16 (cpu, 0); + page = cpu_fetch8 (cpu); + } + cpu_m68hc12_push_uint16 (cpu, cpu_get_pc (cpu)); + cpu_m68hc12_push_uint8 (cpu, cpu_get_page (cpu)); + cpu_set_page (cpu, page); + cpu_set_pc (cpu, addr); + } + break; + + case M6812_RTC: + { + uint8 page = cpu_m68hc12_pop_uint8 (cpu); + uint16 addr = cpu_m68hc12_pop_uint16 (cpu); + + cpu_set_page (cpu, page); + cpu_set_pc (cpu, addr); + } + break; + case M6812_ETBL: default: sim_engine_halt (CPU_STATE (cpu), cpu, NULL, |