Two problems were fixed in BASIC.SYSTEM 1.3, and one new feature was added.
MTR Command
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The new feature is the MTR command, which lets the user enter the system
monitor without having to remember "CALL -151". The user stays in the
monitor until issuing Q or Control-C.
Problem Fixes
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When two or more Applesoft programs were chained together and the length of
the variable table was a multiple of 256, the chain command functioned
incorrectly and the program crashed into the monitor or was sent to the
ONERR command address. This is fixed in BASIC.SYSTEM 1.3.
BASIC.SYSTEM 1.3 also fixes a problem in BSAVE that caused the old length
and load address to be retained when you BSAVEd over an existing file.
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