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BASIC only on reset

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Posted (edited)

I have an 800xl with strange situation. This machine has no peripherals attached.


With first power on, the machine make its SIO noise and then goes to self-test. After pressing reset, the same SIO noise then BASIC READY prompt appears.


Any cartridge put in before power up works (Dig Dug, ASM Editor, Sparta X).


The machine seems to be functioning normally after reset. Any of the chips should I swap out or test?



Edited by Fuji-Man
Add external cart info

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