My TRS80 Pocket Computer PC1 (added to my collection in 2015)

• 2x 4-bit processors running at 256Khz (one dedicated to I/O & LCD driver)
• 1.5K of user RAM
• Basic programming language in ROM
• Quoted 200 hour battery life on 4x button cells
• My unit has the Printer/Cassette interface dock which has:
  1. Audio Cassette tape I/O for program storage.
  2. 16 character wide dot matrix printer (calculator roll type)
  3. Internal rechargeable (AAx4) NiCd battery pack for portable use.