Timex Computer 3256
The TC 3256 or Timex Computer 3256 was a 1987 computer created by Timex of Portugal, a branch of Timex Corporation.

It was a third generation Sinclair ZX Spectrum compatible computer, with expanded capabilities and new BASIC commands supporting the AY-3-8192 sound chip, RS232 network and the 512x192 pixel high resolution graphic mode.

Besides the legacy Sinclair BASIC, the ROM included a work processor (Timeword),  Timex Extended Basic (with support for the Tenet network, floppy disks and RAMdrive) and a CP/M Terminal emulator.
RAM was expanded to 256k

The machine never reached the market since Timex of Portugal shut down its production line before its release.

Technical specifications
CPU
Zilog Z80A 
ROM
  64K
16K Sinclair BASIC
16K Timeword text processor
16K Timex Extended Basic (Tenet, disk, RAMdrive)
16K CP/M Terminal emulator
RAM
 256K
 208K RAMdrive
48K base memory
Display 
 Improved ULA offering additional screen modes:
 Text: 32×24 or 64x32 characters (8×8 pixels, rendered in graphics mode)
 Graphics: 256×192 pixels, 15 colours (two simultaneous colours - "attributes" - per 8×8 pixels, causing attribute clash)
 Extended Color: 256×192 pixels, 15 colors with colour resolution of 32×192 (two simultaneous colours - "attributes" -  per 1×8 pixels)
 Dual Screen: (two 256×192 pixels screens can be placed in memory)
 A two color 512×192 mode
Sound
 Beeper (1 channel, 10 octaves and 10+ semitones via internal speaker)
 AY-3-8912

I/O
RS232:
Cartridge Port
Tape audio in/out for external cassette tape storage
RF television out
Composite video monitor out
RGB monitor out
Kempston Joystick input
Storage
External cassette tape recorder
Disk Drive: TOS / CP/M

Keyboard
69 keys with cursors, numpad and function keys

See also 
Timex Sinclair
Timex Sinclair 2068

References

External links 
 Timex Computer World

ZX Spectrum clones
Home computers
Z80-based home computers
Portuguese inventions