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- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
-
-
- Apple IIc
- #7: Existing Versions
-
- Revised by: Matt Deatherage November 1988
- Written by: Guillermo Ortiz November 1987
-
- This Technical Note describes the main differences between the five different
- IIc ROM versions which encompass the original IIc and four revisions.
- _____________________________________________________________________________
-
-
- Original IIc ( $FBBF = $FF )
-
- o Can use the IIc external drive only
- o No AppleTalk firmware
- o PR#7 boots the second drive
- o Mouse firmware maps to slot 4
- o Serial firmware does not mask incoming linefeed characters
- o Serial firmware does not support XON/XOFF protocol
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-
- 3.5 ROM IIc ( $FBBF = $00 )
-
- o Can use the IIc external drive and the UniDisk 3.5 drive
- o AppleTalk firmware maps to slot 7
- o PR#7 returns the message "AppleTalk Off Line"
- o Mouse firmware maps to slot 4
- o Serial firmware defaults to mask all incoming linefeed characters
- o Serial firmware supports XON/XOFF protocol
-
- Original "Memory-Expandable" IIc ( $FBBF = $03 )
-
- o Can use the IIc external drive, the UniDisk 3.5 drive, and the IIc
- Memory Expansion Card
- o Mouse firmware maps to slot 7
- o No AppleTalk firmware
- o PR#7 kills the system
- o Serial firmware defaults to mask all incoming linefeed characters
- o Serial firmware supports XON/XOFF protocol
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-
- Revised "Memory-Expandable" IIc ( $FBBF = $04 )
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- Same as Original Memory-Expandable, plus:
- o Keyboard buffering firmware bug fixed
- o Firmware returns correct information when the Memory Expansion Card is
- not present
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- Apple IIc Plus ( $FBBF = $05 )
-
- o Can use the external IIc drive, the UniDisk 3.5 drive, the Apple 3.5
- drives, but not the original IIc Memory Expansion Card.
- o Contains a Memory Expansion Card connector
- o 3.5" internal drive replaces 5.25" internal drive
- o Mouse maps to slot 7
- o PR#7 kills the system
- o 4 MHz 65C02 microprocessor
- o Accelerator chip and static RAM cache permit operation up to 4 MHz
- o Keyboard replaced with Apple Standard Keyboard (minus numeric keypad)
- o Internal power supply
- o Internal modem connector
- o Serial ports refitted with mini-DIN 8 connectors
- o Headphone jack has been removed
- o Volume control relocated above the keyboard
- o 40/80 column switch replaced by keyboard (Sholes/Dvorak) switch
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- Further Reference
- _____________________________________________________________________________
- o Apple IIc Technical Reference Manual, Second Edition
- o Apple IIc Technical Note #5, Memory Expansion on the Apple IIc
- o Apple IIc Technical Note #6, Buffering Blues
- o Apple II Miscellaneous Technical Note #2, Apple II Family Identification
- Routines 2.1
- o Apple II Miscellaneous Technical Note #7, Apple II Family Identification
- o Apple II Miscellaneous Technical Note #8, Pascal 1.1 Firmware Protocol
- ID Bytes
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