Hey all,
I have a question concerning how the reset/CIC circuit operates/fails.
A SNES I am working on has a clean connector, clean carts, and new caps.
Using Smartball (a rather quick-booting cartridge) as a test, power-up always shows the initial Sony screen. Sometimes the Sony screen will freeze and not fade into the title screen. Powering down and powering up (leaving the cart in the slot) can boot the cart successfully/completely.
Sometimes the cart will work on first power-up. Sometimes it takes a power cycle or several to get it up. I have never had a game freeze on me during gameplay after a successful start.
Pushing the reset button after a successful or failed start-up will almost always never work (ex: freeze at initial Sony screen in Smartball).
I suppose it is possible that these symptoms are related to cleaning, but I have done a pretty good job cleaning the cart slot & have multiple replacement slots available from donor systems (that always work on first boot). I can even wiggle the cart a little bit while it is in the slot after a successful boot, and the game does not freeze.
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So now my question(s) - Is it possible that the CIC chip/reset circuit is having issues? Do these symptoms sound related to that circuit or something else? Can the CIC chip be "moody" and boot a game sometimes and not others?
I have a multimeter and oscilloscope to monitor if needed.
Appreciate any input.
EDIT: Changed thread title to relate it to boot sequence as CIC chip has been bypassed and reset switch replaced.
I have a question concerning how the reset/CIC circuit operates/fails.
A SNES I am working on has a clean connector, clean carts, and new caps.
Using Smartball (a rather quick-booting cartridge) as a test, power-up always shows the initial Sony screen. Sometimes the Sony screen will freeze and not fade into the title screen. Powering down and powering up (leaving the cart in the slot) can boot the cart successfully/completely.
Sometimes the cart will work on first power-up. Sometimes it takes a power cycle or several to get it up. I have never had a game freeze on me during gameplay after a successful start.
Pushing the reset button after a successful or failed start-up will almost always never work (ex: freeze at initial Sony screen in Smartball).
I suppose it is possible that these symptoms are related to cleaning, but I have done a pretty good job cleaning the cart slot & have multiple replacement slots available from donor systems (that always work on first boot). I can even wiggle the cart a little bit while it is in the slot after a successful boot, and the game does not freeze.
----
So now my question(s) - Is it possible that the CIC chip/reset circuit is having issues? Do these symptoms sound related to that circuit or something else? Can the CIC chip be "moody" and boot a game sometimes and not others?
I have a multimeter and oscilloscope to monitor if needed.
Appreciate any input.
EDIT: Changed thread title to relate it to boot sequence as CIC chip has been bypassed and reset switch replaced.