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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06486 Side-by-side Minor Always Jan 29, 2017, 16:12 Feb 18, 2017, 12:49
Tester trebor View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Confirmed Driver a2600.cpp
Version 0.182 Fixed in Version Build 64-bit
Summary MESS-specific 06486: a2600: Default stack pointer position for the m6507(6502) is incorrect.
Description Real Atari 2600 console hardware uses $FD for the MOS 6507. MAME reveals the default stack to be set to $BD.
Steps To Reproduce Load attached StackP.bin file under the a2600 driver.
Additional Information Side Note: Stella (emulator) comes closer with a inital-default stack of $FF, but missing the mark as well.
Regression Version
Affected Sets / Systems a2600
Attached Files
zip file icon (376 bytes) Jan 29, 2017, 16:12 Uploaded by trebor
ROM that displays the initial value of the stack pointer.
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