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LDA zero page emulation and test for it.

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This commit is contained in:
Radosław Kujawa 2017-01-19 11:49:05 +01:00
parent 49b70f0e1f
commit 6b7ddbf865
4 changed files with 25 additions and 13 deletions
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2
src/65c02isa.csv
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@ -163,7 +163,7 @@ OP_LDA_IZPX,"lda",IZPX,2,NULL
OP_LDX_IMM,"ldx",IMMEDIATE,2,NULL
OP_NOPI_A4,"nop",IMPLIED,1,NULL
OP_LDY_ZP,"ldy",ZP,2,NULL
OP_LDA_ZP,"lda",ZP,2,NULL
OP_LDA_ZP,"lda",ZP,2,emul_lda
OP_LDX_ZP,"ldx",ZP,2,NULL
OP_SMB2_ZP,"smb2",ZP,2,NULL
OP_TAY,"tay",IMPLIED,1,NULL

1 OP_BRK brk IMPLIED 1 NULL
163 OP_LDX_IMM ldx IMMEDIATE 2 NULL
164 OP_NOPI_A4 nop IMPLIED 1 NULL
165 OP_LDY_ZP ldy ZP 2 NULL
166 OP_LDA_ZP lda ZP 2 NULL emul_lda
167 OP_LDX_ZP ldx ZP 2 NULL
168 OP_SMB2_ZP smb2 ZP 2 NULL
169 OP_TAY tay IMPLIED 1 NULL

1
src/instruction.c
View File

@ -186,7 +186,6 @@ instruction_data_read_1(rk65c02emu_t *e, instrdef_t *id, instruction_t *i)
case ABSOLUTEY:
case IABSOLUTE:
case IABSOLUTEX:
default:
printf("unhandled addressing mode for opcode %x\n",
i->opcode);

2
test/Makefile
View File

@ -5,7 +5,7 @@ VASM=vasm6502_std
VASMFLAGS=-Fbin -c02
TESTS=test_bus test_emulation
TESTROMS=test_emulation_nop.rom
TESTROMS=test_emulation_nop.rom test_emulation_lda_imm.rom test_emulation_lda_zp.rom
all : $(TESTS) $(TESTROMS)

33
test/test_emulation.c
View File

@ -1,6 +1,7 @@
#include <atf-c.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "bus.h"
@ -8,6 +9,18 @@
#define ROM_LOAD_ADDR 0xC000
bool rom_start(rk65c02emu_t *, const char *);
bool
rom_start(rk65c02emu_t *e, const char *name)
{
e->regs.PC = ROM_LOAD_ADDR;
bus_load_file(e->bus, ROM_LOAD_ADDR, name);
rk65c02_start(e);
return true;
}
ATF_TC_WITHOUT_HEAD(emul_lda);
ATF_TC_BODY(emul_lda, tc)
{
@ -17,17 +30,17 @@ ATF_TC_BODY(emul_lda, tc)
b = bus_init();
e = rk65c02_init(&b);
e.regs.PC = ROM_LOAD_ADDR;
bus_write_1(&b, ROM_LOAD_ADDR, 0xA9);
bus_write_1(&b, ROM_LOAD_ADDR+1, 0xAF);
bus_write_1(&b, ROM_LOAD_ADDR+2, 0xDB);
rk65c02_start(&e);
ATF_CHECK(e.regs.PC == ROM_LOAD_ADDR+3);
/* LDA immediate */
ATF_REQUIRE(rom_start(&e, "test_emulation_lda_imm.rom"));
/* ATF_CHECK(e.state == STOPPED); // separate test case for states? */
ATF_CHECK(e.regs.PC == ROM_LOAD_ADDR+3); // separate test case for PC? */
ATF_CHECK(e.regs.A == 0xAF);
/* LDA zero page */
bus_write_1(&b, 0x10, 0xAE);
ATF_REQUIRE(rom_start(&e, "test_emulation_lda_zp.rom"));
ATF_CHECK(e.regs.A == 0xAE);
bus_finish(&b);
}
@ -42,7 +55,7 @@ ATF_TC_BODY(emul_nop, tc)
e.regs.PC = ROM_LOAD_ADDR;
bus_load_file(&b, 0xC000, "test_emulation_nop.rom");
bus_load_file(&b, ROM_LOAD_ADDR, "test_emulation_nop.rom");
rk65c02_start(&e);