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Add functions for instructions, cycles, and address modes.

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This also adds a new table for cycles, and adds unit test functions for
the work as well.
This commit is contained in:
Peter Evans
2017-12-04 23:30:18 -06:00
parent 87de0a877a
commit 54473be302
5 changed files with 131 additions and 1 deletions
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7
tests/mos6502.addr.c
View File

@@ -3,6 +3,13 @@
#include "mos6502.h"
#include "mos6502.enums.h"
Test(mos6502, addr_mode)
{
cr_assert_eq(mos6502_addr_mode(0xEA), IMP);
cr_assert_eq(mos6502_addr_mode(0xD6), ZPX);
cr_assert_eq(mos6502_addr_mode(0xF0), REL);
}
Test(mos6502, get_address_resolver) {
INIT_ADDR_MODE();

28
tests/mos6502.c
View File

@@ -93,3 +93,31 @@ Test(mos6502, set_status)
END_CPU_TEST(mos6502);
}
Test(mos6502, instruction)
{
cr_assert_eq(mos6502_instruction(0x1D), ORA);
cr_assert_eq(mos6502_instruction(0xD8), CLD);
cr_assert_eq(mos6502_instruction(0x98), TYA);
}
Test(mos6502, cycles)
{
START_CPU_TEST(mos6502);
cr_assert_eq(mos6502_cycles(cpu, 0x76), 6);
cr_assert_eq(mos6502_cycles(cpu, 0xBA), 2);
// In this case, we aren't cross a page boundary, and the number of
// cycles should stay at 4
cpu->last_addr = 0x5070;
cpu->X = 23;
cr_assert_eq(mos6502_cycles(cpu, 0x1D), 4);
// Testing that crossing a page boundary adds one to the number of
// cycles
cpu->X = 200;
cr_assert_eq(mos6502_cycles(cpu, 0x1D), 5);
END_CPU_TEST(mos6502);
}