The U880 CPU within the Robotron 1715

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Presentation transcript:

The U880 CPU within the Robotron 1715 A PROJECT BY Johannes Jähn Michael Riedl Florian Leithäuser Gerd Utecht For Prof. Dr. Abzug, CS350, 12/08/1998

The U880 CPU within the Robotron 1715 Personal Computer Build from by Most common OS’s Size (WxDxH) in cm Weight Kg Languages PC1715, 1715W 1985 to 1990 VEB Büromaschinenwerke Sömmerda SCP 3.2, CP/A, BROS, JAMP 50 x 40 x 14 12,8 Basic, Pascal, Assembler, Fortran

The U880 CPU within the Robotron 1715 Clock Speed Registers RAM ROM Interfaces Resolution FDDs etc. Kind of Case Keyboard UA880 4 MHz 8 bit 64 KB (Max. 256 KB) 2 KB Keyboard, Monitor, V.24, 2 x FDD slots, Printer Text: 64 x 16 or 80 x 24 2 x 5,25" FDD, @ 720 KB Desktop with FDD, separate monitor & keyboard QWERTY, separate number block, 98 keys 15 Function keys

The U880 CPU within the Robotron 1715 Instruction Set: 131 native instructions 177 additional instructions 1, 2, 4, 8 & 16 bit instructions all common shift operations ( logical, arithmetical, circular) based on Z80 instructions but not compatibale

The U880 CPU within the Robotron 1715

The U880 CPU within the Robotron 1715

The U880 CPU within the Robotron 1715

The U880 CPU within the Robotron 1715 Addressing Modes: Direct Mode Immediate Mode Indexed Mode Indirect Mode

The U880 CPU within the Robotron 1715

The U880 CPU within the Robotron 1715 The Memory Organization A) 64k version Addressing from 0000 - FFFF + external 2k ROM + 2k Interlace Refresh Memory B) 256k version Addressing from 00000 - 3FFFF

The U880 CPU within the Robotron 1715 THANK YOU! Please download our presentation and term paper at http://www.riedl.com/cs350.zip