Callisto Software

924 2nd Street East, Saskatoon Canada S7H 1R1

Hastings-Trew was a Kolorworks owner and wrote a graphics toolkit for the product.


Drawing program with many features, brushes and patterns. Uses a 48×64 pixel “window” to the 256×192 image.
Downloadable TS 1000
Copy artwork to TS 2040 printer. Requires TS 1000 with socketed 2K RAM and hardware modification.
TS 1000
Toolkit for high resolution graphics. Upper and lower case text, 128×192 resolution, graphics routines.
TS 1000


  • Sinc Artist 1.3
  • SINC-ARTIST Hi-Res Graphics Program Review
    Review of the graphics program with notes on required 8K non-volatile RAM.
  • T-S News
    CNN reported on the Sinclair C-5. News about the Spectrum Plus, ICL QL-based One Per Desk product. Sync Artist 1.3 from Callisto Software.
  • ZX 81 News and Resources
    Bug alert for Aerco CP-ZX ver 2.2 centronics interface. Review of JLO Video Upgrade Project (TMS9918A). Hardware User Report: JLO Video Upgrade Project Just what sort of peripheral is this video project? Let me begin with a sweeping analogy: the Video Upgrade Project is just like a video monitor, a disk interface, or a full-size
  • ZX81 Hardware and Software News
    Short notes on ZX81/TS1000. This issue includes brief info on Larken, COMPUSA, Aerco and Oliger 1000/2068 disk systems. Also, why Aerco CP/M was never released. Short reviews of Sinc-Artist for the 2068 and ZX HI-Res. And one user, a Kolorworks owner, mentions writing a TMS9918 toolkit for the ZX81.

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