The Tardis Keyboard Computer:
Project Smurd

For more information about Project Smurd, see Keyboard Notes.md.

Contents

• Arduino - Microcontroller source code to drive the key matrix scanner.
• Photos - Various photos of the device and its components.
  • TardisBuilders - Photos of another keyboard of the same model.
• Circuit Reverse Engineering - Identification and wiring of the electronic components
  • Button Matric PCB - The PCB onto which the keys are soldered is completely reverse engineered
  • Logic Board Labelled - Electronic components on the logic board are identified
  • Logic Board Wiring - A mostly complete trace route identification of the logic board
• EEPROM - The contents of the persistent data storage of the device.
  • Empros 8830-101 (ROM No 56600413 27, Aug 1992), U4 EPROM - The raw binary dump of the EEPROM
  • Empros 8830-101 (ROM No 56600413 27, Aug 1992), U4 EPROM.dump - A "hex dump" of the data
  • KeyboardOS - Artifacts from Ghidra
    • disassembly.html - Human-readable disassembly of the Z80 machine code
    • decompiled_c.html & decompiled.c - Ghidra's decompilation to C.
    • KeyboardOS.gpr - Ghidra project file
    • KeyboardOS.rep - Ghidra's internal files, not human readable

Device Information

Manufacturer	Control Data Corporation and and Empros Systems International	"CDC's Energy Management Division was one of its most successful business units, providing control systems solutions that managed as much as 25% of all electricity on the planet. In 1988 or 1989, this division was renamed Empros and was later sold to Siemens as CDC broke apart.[28]"
Manufactured For	The National Grid Company plc Contract No. FCGCP/-/I1080	"Intended For..."
Name(s)	Operations Keyboard, Keyboard NGC	The same across at least two keyboards.
Equipment ID NO.	Multiple: CA312B, QSE 36444	The same across at least two keyboards.
Part Number	Multiple: 56598681, 56599470	The same across at least two keyboards. Part numbers found within the device and on the EEPROM have the form 5659XXXX.
HPC/EC NO.	56598681	The same across at least two keyboards.
Series Code	01	The same across at least two keyboards.
Product Model	8830-101	The same across at least two keyboards.
Known serial numbers	1037, 1046
Firmware	ROM PART NUMBER IS 56600413 27 AUG 1992	Data embedded in EEPROM.
Installation Date	24/9/92 for serial numbers 1037 & 1046	Installed by A. Williams?
Additional ID	56598203 E EM 9146	Small sticker on back, top. The same across at least two keyboards.