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Account for incremented PC byte in rel tests

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This commit is contained in:
Peter Evans 2018-01-09 16:06:41 -06:00
parent 4beff0bff8
commit 7e51339b88
1 changed files with 6 additions and 2 deletions
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8
tests/mos6502.addr.c
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@ -107,7 +107,7 @@ Test(mos6502_addr, addr_mode_rel_positive)
cpu->PC = 123;
SET_PC_BYTE(cpu, 0, 88);
cr_assert_eq(mos6502_resolve_rel(cpu), 0);
cr_assert_eq(cpu->last_addr, 211);
cr_assert_eq(cpu->last_addr, 212);
}
Test(mos6502_addr, addr_mode_rel_negative)
@ -115,7 +115,11 @@ Test(mos6502_addr, addr_mode_rel_negative)
cpu->PC = 123;
SET_PC_BYTE(cpu, 0, 216);
cr_assert_eq(mos6502_resolve_rel(cpu), 0);
cr_assert_eq(cpu->last_addr, 34);
// Why not 83? Because when we resolve the relative address, PC will
// have incremented to account for the byte operand. So the correct
// calculation seems to be 123 + 1 + 216 - 256, which is 84.
cr_assert_eq(cpu->last_addr, 84);
}
Test(mos6502_addr, addr_mode_zpg)