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Account for changes in behavior for INC/DEC

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This commit is contained in:
Peter Evans 2018-04-14 18:22:10 -05:00
parent 7c78c22618
commit 72883240c3
1 changed files with 9 additions and 9 deletions
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18
tests/mos6502/arith.c
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@ -92,22 +92,21 @@ Test(mos6502_arith, cpy)
Test(mos6502_arith, dec)
{
cpu->A = 5;
mos6502_set(cpu, cpu->PC, 0x3A);
mos6502_handle_dec(cpu, 0);
cr_assert_eq(cpu->A, 4);
cpu->eff_addr = 123;
mos6502_set(cpu, 123, 44);
// Note _also_ that DEC expects the number to be decremented will be
// passed in as the effective operand, although it doesn't
// necessarily need for that to be so.
mos6502_handle_dec(cpu, 44);
cr_assert_eq(mos6502_get(cpu, 123), 43);
cpu->eff_addr = 0;
cpu->A = 0;
mos6502_handle_dec(cpu, 0);
cr_assert_eq(cpu->A, 0xff);
cpu->eff_addr = 123;
mos6502_set(cpu, 123, 44);
mos6502_set(cpu, cpu->PC, 0x00);
mos6502_handle_dec(cpu, 44);
cr_assert_eq(mos6502_get(cpu, 123), 43);
}
Test(mos6502_arith, dex)
@ -132,6 +131,7 @@ Test(mos6502_arith, inc)
cpu->A = 8;
cpu->eff_addr = 0;
mos6502_set(cpu, cpu->PC, 0x1A);
mos6502_handle_inc(cpu, 0);
cr_assert_eq(cpu->A, 9);