Author: Mike Askins (rev. Matt Deatherage)
Year: 1987
... discusses a bug involving buffering and serial port setting commands in the modem firmware in ROM 1.0.
Apple II
Technical Notes
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Developer Technical Support
Apple IIGS
#13: ROM 1.0 Modem Firmware Bug
Revised by: Matt Deatherage November 1988
Written by: Mike Askins April 1986
This Technical Note formerly discussed a bug involving buffering and serial
port setting commands in the modem firmware in ROM 1.0.
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Apple IIGS ROM 2.0 fixes a bug involving buffering and serial port setting
commands in the modem firmware. You should not have to write a special case
to handle this bug since it is reasonable to expect users to have the updated
ROM which is offered as a free upgrade from Apple.