Difference between revisions of "ZX Spectrum +2A/2B, +3/3B"

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(Hardware)
(Hardware)
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==Hardware==
 
==Hardware==
=====Both the +3 and Black +2 have the following hardware specifications:=====
+
=====Common hardware specifications=====
 
* Processor: Zilog Z80A microprocessor clocked at 3.5469MHz.
 
* Processor: Zilog Z80A microprocessor clocked at 3.5469MHz.
 
* ROM: 64KB ROM. 2*32KB EPROM arranged in 4 pages of 16KB.
 
* ROM: 64KB ROM. 2*32KB EPROM arranged in 4 pages of 16KB.
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* I/O: Software controlled RS232 serial port. AUX Port. Tape In (ear) and Tape Out (mic). Two Sinclair SJS Joystick Ports. Parallel Printer Port
 
* I/O: Software controlled RS232 serial port. AUX Port. Tape In (ear) and Tape Out (mic). Two Sinclair SJS Joystick Ports. Parallel Printer Port
  
=====The +3 has the following additional components:=====
+
=====+3 specific hardware=====
 
* Floppy Disc Controller: Zilog Z0765A ([[uPD765A]]).
 
* Floppy Disc Controller: Zilog Z0765A ([[uPD765A]]).
 
* I/O: "Disk B:" External disk drive connector.
 
* I/O: "Disk B:" External disk drive connector.
  
=====The Black +2 has the following additional components:=====
+
=====Black +2 specific hardware=====
 
* Cassette interface daughterboard.
 
* Cassette interface daughterboard.
 
* "Datacorder" cassette mechanism.
 
* "Datacorder" cassette mechanism.

Revision as of 19:01, 24 October 2010


Hardware

Common hardware specifications
  • Processor: Zilog Z80A microprocessor clocked at 3.5469MHz.
  • ROM: 64KB ROM. 2*32KB EPROM arranged in 4 pages of 16KB.
  • RAM: 128KB of Dynamic RAM, arranged in 8 pages of 16KB.
  • Graphics: 256 x 129 pixels, 16 colours, attribute based. See Spectrum Video Modes.
  • Sound: AY-3-8912 3 channel, 8 octave Programmable Sound Generator and "beeper". Modulated onto video signal.
  • Keyboard: 58 plastic keys with metal springs, operating a plastic membrane.
  • I/O: Software controlled RS232 serial port. AUX Port. Tape In (ear) and Tape Out (mic). Two Sinclair SJS Joystick Ports. Parallel Printer Port
+3 specific hardware
  • Floppy Disc Controller: Zilog Z0765A (uPD765A).
  • I/O: "Disk B:" External disk drive connector.
Black +2 specific hardware
  • Cassette interface daughterboard.
  • "Datacorder" cassette mechanism.