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https://github.com/rkujawa/rk65c02.git
synced 2024-12-12 10:30:23 +00:00
Add emulation of PHP, PLP instructions and test cases for them.
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074ecdccc3
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@ -7,7 +7,7 @@ OP_TSB_ZP,"tsb",ZP,2,NULL
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OP_ORA_ZP,"ora",ZP,2,NULL
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OP_ASL_ZP,"asl",ZP,2,NULL
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OP_RMB0_ZP,"rmb0",ZP,2,NULL
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OP_PHP,"php",IMPLIED,1,NULL
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OP_PHP,"php",IMPLIED,1,emul_php
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OP_ORA_IMM,"ora",IMMEDIATE,2,NULL
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OP_ASL,"asl",ACCUMULATOR,1,NULL
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OP_NOPI_C,"nop",IMPLIED,1,NULL
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@ -39,7 +39,7 @@ OP_BIT_ZP,"bit",ZP,2,NULL
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OP_AND_ZP,"and",ZP,2,emul_and
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OP_ROL_ZP,"rol",ZP,2,NULL
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OP_RMB2_ZP,"rmb2",ZP,2,NULL
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OP_PLP,"plp",IMPLIED,1,NULL
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OP_PLP,"plp",IMPLIED,1,emul_plp
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OP_AND_IMM,"and",IMMEDIATE,2,emul_and
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OP_ROL,"rol",ACCUMULATOR,1,NULL
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OP_NOPI_2C,"nop",IMPLIED,1,NULL
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@ -85,6 +85,13 @@ emul_pha(rk65c02emu_t *e, void *id, instruction_t *i)
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stack_push(e, e->regs.A);
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}
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/* PHP - push processor flags to stack */
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void
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emul_php(rk65c02emu_t *e, void *id, instruction_t *i)
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{
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stack_push(e, e->regs.P);
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}
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/* PLA - pull from stack to accumulator */
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void
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emul_pla(rk65c02emu_t *e, void *id, instruction_t *i)
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@ -95,6 +102,13 @@ emul_pla(rk65c02emu_t *e, void *id, instruction_t *i)
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instruction_status_adjust_negative(e, e->regs.A);
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}
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/* PLA - pull from stack to processor flags */
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void
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emul_plp(rk65c02emu_t *e, void *id, instruction_t *i)
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{
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e->regs.P = stack_pop(e) | P_UNDEFINED;
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}
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/* SEC - set the carry flag */
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void
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emul_sec(rk65c02emu_t *e, void *id, instruction_t *i)
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@ -17,6 +17,7 @@ rk65c02_init(bus_t *b)
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e.bus = b;
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e.state = STOPPED;
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e.regs.P = P_UNDEFINED;
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return e;
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}
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@ -10,6 +10,7 @@ TESTROMS=test_emulation_and_imm.rom \
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test_emulation_dex.rom test_emulation_dey.rom \
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test_emulation_inx.rom test_emulation_iny.rom \
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test_emulation_pha.rom test_emulation_pla.rom \
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test_emulation_php.rom test_emulation_plp.rom \
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test_emulation_nop.rom \
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test_emulation_lda_imm.rom test_emulation_lda_zp.rom \
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test_emulation_stz_zp.rom
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@ -224,6 +224,35 @@ ATF_TC_BODY(emul_stack, tc)
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bus_finish(&b);
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}
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ATF_TC_WITHOUT_HEAD(emul_php_plp);
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ATF_TC_BODY(emul_php_plp, tc)
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{
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rk65c02emu_t e;
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bus_t b;
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b = bus_init();
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e = rk65c02_init(&b);
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e.regs.SP = 0xFF;
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e.regs.P |= P_CARRY|P_ZERO|P_UNDEFINED;
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ATF_REQUIRE(rom_start(&e, "test_emulation_php.rom"));
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ATF_CHECK(e.regs.SP == 0xFE);
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ATF_CHECK(bus_read_1(e.bus, STACK_END) == (P_CARRY|P_ZERO|P_UNDEFINED));
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/*
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* Now let's see if loading back into accumulator works.
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*/
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bus_write_1(e.bus, STACK_END, P_CARRY|P_DECIMAL);
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ATF_REQUIRE(rom_start(&e, "test_emulation_plp.rom"));
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ATF_CHECK(e.regs.SP == 0xFF);
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ATF_CHECK(e.regs.P == (P_CARRY|P_DECIMAL|P_UNDEFINED));
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bus_finish(&b);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, emul_and);
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@ -233,7 +262,7 @@ ATF_TP_ADD_TCS(tp)
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ATF_TP_ADD_TC(tp, emul_lda);
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ATF_TP_ADD_TC(tp, emul_nop);
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ATF_TP_ADD_TC(tp, emul_stz);
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ATF_TP_ADD_TC(tp, emul_php_plp);
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ATF_TP_ADD_TC(tp, emul_stack);
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return (atf_no_error());
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3
test/test_emulation_php.s
Normal file
3
test/test_emulation_php.s
Normal file
@ -0,0 +1,3 @@
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start: php
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stp
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3
test/test_emulation_plp.s
Normal file
3
test/test_emulation_plp.s
Normal file
@ -0,0 +1,3 @@
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start: plp
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stp
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