Technical Specifications
Detailed feature list of the TS2068:
- Z80A processor clocked at 3.58Mhz
- AY-3-8912 Sound Chip (same as 128K Spectrums) w/ clock 1.76475Mhz
It is attached to different ports compared with the Spectrums, so
you don't hear AY music when playing Speccy games (of course, it
can be overcome). I mention the clock rate here because it is
slightly different from the Spectrum's.
- 72K (48K RAM; 24K ROM) which is bankswitched between three internal
64K memory banks called the HOME bank (16K ROM, 48K RAM), the
EXROM bank (8K ROM; this one is not completely decoded and can
only hold 8K), and the DOCK bank which is empty and is reserved for
cartridges. The memory is bankswitched in 8K chunks.
- The BASIC is a superset of 48K Spectrum BASIC (ie - has a few
commands added).
- A cartridge dock is located under a door on the right side of
the computer.
- Two joystick connectors (not compatible with any Sinclair joysticks)
- RF out, Composite video available on jacks. RGB signals available
on rear edge connector.
- Hardware was nicely designed to support DMA and memory bankswitching.
- Video Modes:
- 256x192 pixel, 32x24 attributes (Spectrum screen)
- 256x192 pixel, 32x192 attributes (extended colour mode)
- Dual screen mode where you could flip between two Spectrum screens
- 512x192 pixel monochrome
Power Requirements:
DVE power supply, 15 V at 1 Amp DC, and with the outside sleeve of the plug positive and the inside negative.
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