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Update om6502.lst

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Now passes Lorenz testsuite-2.15's cputiming.prg (and does not break laxay.prg)
Ref: NMOS 6510 Unintended Opcodes no more secrets (v0.91 - 24/12/16) http://csdb.dk/release/?id=152327 page 14 ($BF) cycles = 3 to read, and 4+1 if page boundary.
This commit is contained in:
David Viens 2017-08-16 14:43:47 -04:00 committed by GitHub
parent 19cb321e34
commit 0fdcae9048
1 changed files with 4 additions and 3 deletions
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7
src/devices/cpu/m6502/om6502.lst
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@ -1395,9 +1395,10 @@ lax_aba
lax_aby
TMP = read_pc();
TMP = set_h(TMP, read_pc());
read(set_l(TMP, TMP+Y));
TMP += Y;
A = X = read(TMP);
if(page_changing(TMP, Y)) {
read(set_l(TMP, TMP+Y));
}
A = X = read(TMP+Y);
set_nz(A);
prefetch();