Description: Apple IIGS: Differences with other Apple II models
Header: Apple IIGS: Differences with other Apple II models

 Some of the features found only on the Apple IIGS:

 FEATURE             SPECIFICATION               DESCRIPTION
 -------             -------------               -----------
 More powerful       65C816                      16-bit microprocessor has 24
 microprocessor                                  bit address and 6502
                                                compatibility

 Faster Operation    CPU clock speeds of 1 MHz   User can select either of two
                    and 2.8 MHz                 speeds: 1 MHz speed of 6502
                                                or fast 2.8 MHz.

 Memory Expansion    24-bit address bus          Expansion card can expand RAM
                                                up to as much as 8 megabytes

 Detached Keyboard   78 keys                     Separate keyboard includes
                                                cursor keys and numeric pad.

 Apple DeskTop Bus   Low cost serial I/O         Supports detached keyboard,
                                                mouse, and other I/O devices.

 RGB Video           R, G, B and sync            Provides both RGB and NTSC
                                                video outputs.

 40 and 80 column    Text, background, and       Text, background, and border
 text in color       border colors (RGB only)    can be any of sixteen colors.

 Super Hi-Res color  True 320x200 or 640x200     Improved graphics with up to
                                                16 graphics colors per scan
                                                line-up to 256 colors on
                                                screen out of 4096.

 Desktop user        Uses Hi-Res color graphics  Tool box supports desktop
 interface           and mouse                   interface with mouse, menus,
                                                and windows

 Improved Sound      Ensoniq digital sound IC    Supports 15 independent
                    with 32 oscillators         voices (GS retains Apple II
                                                type sound)

 Control Panel       Built-in desk accessory     User may set machine
                                                parameters for display,
                                                operating speed,
                                                serial ports, disk drives,
                                                etc.

 Enhanced Monitor    Monitor in ROM              Handles 16-bit and 24-bit
                                                addresses, assembles and
                                                disassembles 65C816 and 6502
                                                instructions, performs 32-bit
                                                arithmetic, Low level I/O
                                                included

 Built-in Clock      Time and Date provided      Has battery back up

 Built-in Serial     Two standard serial ports   Support modems, printers, and
 ports                                           AppleTalk. (User can still
                                                use serial card in slot)

 Built-in AppleTalk  Uses one serial port        No card required. User can
                                                select either serial port to
                                                use for AppleTalk.

 Built-in Disk port  Disk I/O port using custom  User can select built-in
                    chip                        driveport,disk interface
                                                cards, or both.

 Apple II type features found on the Apple IIGS:

 FEATURE             DESCRIPTION                 OTHER MODELS
 -------             -----------                 ------------
 6502 Instruction    65816 has emulation mode    All Apple II
 set                 for running 6502 programs

 128k RAM            Main and aux banks, with    IIc, 128 IIe
                    language-card & I/O spaces

 AppleSoft in ROM    Applesoft Basic with lower  All Apple II
                    case and 80-column features

 Monitor in ROM      Supports low level I/O and  All Apple II
                    program development

 40 and 80 column    Black & White text displays IIc, IIe with 128k or 80
 text                (color text on GS only)     column card

 Lo-Res Color        48x40, 16 colors            All Apple II
 graphics

 Hi-Res Color        280x192, 6 colors           All Apple II
 graphics

 Double Hi-Res       560x192, 16 colors          IIc, 128k IIe
 Color graphics

 Built-in serial     Two RS232 compatible ports, IIc (similar)
 ports               for modem, printer, etc.

 Built-in disk port  Using IWM chip, supports    IIc
                    both 5.25", 3.5" drives

 Expansion slots (7) Slots for peripheral I/O    II, II Plus, IIe
                    and expansion cards, in
                    addition to built-in ports

 Game I/O            9-pin and 16-pin connectors All Apple II (9 pin IIe, IIc)
                    for paddles and joysticks
 Apple Technical Communications


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