The CST Thor
series of personal computers
were Sinclair QL
-compatible systems designed and produced by Cambridge Systems Technology
during the late 1980s.
The original Thor PC
(also called Thor 1
, sometimes also retrospectively referred to as the Thor 8
), was launched in 1986, as a logical progression of CST's QL peripheral business after production of the QL was halted. The remaining stock of QL parts were purchased from Sinclair, and the standard QL motherboard
(including a 7.5 MHz Motorola 68008
CPU and 128 KiB
) was augmented with a CST-designed expansion board providing 512 KiB of additional RAM, extra ROM
, a non-volatile real-time clock, floppy disk
parallel, IBM PC/AT
-style keyboard and mouse
interfaces enclosed in a low-profile metal desktop case with a built-in power supply. Mass storage options consisted of one (Thor 1F) or two (Thor 2F) 3.5-inch floppy drives or one floppy drive and one 20 MB Rodime
RO652 SCSI hard disk
(Thor 2WF). The ROMs contained Eidersoft's ICE GUI
and some QDOS
extensions. Also supplied with the Thor was a specially-commissioned version of the Psion
Xchange application software suite (an enhanced edition of the Psion applications bundled with the QL).
Prices for the Thor PC ranged from £599 to £1399, excluding monitor, mouse and VAT
. An upgrade service for existing QLs was also available.
Total production of the Thor PC ran to around 1100 units.
The Thor 20
and Thor 21
were... Read More