Bell & Howell Apple ][ Plus
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Introduced June 1979
Discontinued January 1983
Release Price    

 

System Architecture

    

Memory

  
Microprocessor MOSTEK 6502   Standard on system board 48k
Clock speed 1.023 MHz   Maximum on system board 48k
Bus type Apple Proprietary   Maximum total memory 64k using plug in board
Data bus width 8-bit   Memory speed and type 200ns dynamic RAM
Address bus width 16-bit   System board memory socket type 16 pin DIP
Interrupt levels N/A   Number of memory module sockets 24 socketed
DMA channels N/A   Memory used on system board TMS4116-20

Standard Features

    

Disk Storage

  
ROM size 16k   Internal disk and tape drive bays none
Optional math coprocessor no   Standard floppy drives tape or 5.25 Floppy
Parallel port type none   Optional floppy drives: up to 2 external
RS232C serial ports none   * 5 1/4 inch 143k yes
Mouse ports internal I/O socket   * 5 1/4 inch 1.2MB no
UART chip used N/A   * 3 1/2 inch 720k no
Maximum speed N/A   * 3 1/2 inch 1.44MB no
CMOS real time clock no   * 3 1/2 inch 2.88MB no
CMOS RAM no   Hard disk controller included no

Video & Graphics

    

Sound

  
Graphics Processor uses CPU   Sound Interface device uses CPU
Screen size - Col x Rows 40 x 24   Sound generation tone output to speaker
Resolution - Colors/High 6 / 280 x 192   ADSR capable no
Resolution - Colors/Low 16 / 40 x 48      
Max colors 16   Programming language  
Sprites or Missiles none   Built in language Applesoft BASIC
      Built in M L monitor yes

Expansion Slots

    

Keyboard Specs.

  
Total adapter slots 8   Number of keys 52
Number of 8/16/32 bit slots 8 / 0 / 0   Upper/lower case yes / no
      Keyboard cable length N/A

Physical Specs.

    

Environmental Specs.

  
* Height 4 1/4 inches   Operating voltage @ 60 Hz 120 VAC
* Width 15 1/4 inches   Maximum power supplied 60 WATTS
* Depth 17 3/4 inches   Power supply output - volts +5V/-5.2V/+11.8V/-12V
* Weight 11.5 pounds   Power supply output - amps