Make this my favourite The Sinclair QL QDOS Companion by Andrew Pennell

Retro Computers >> Sinclair >> Sinclair QL >> Books
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Stoke-on-Trent, Staffordshire, United Kingdom
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Buyer Value Date and hour Quantity bought
l***1 (24) £4.99 22/02/2019 19:06:44 1
g***0 (26) £4.99 12/07/2018 10:12:09 1
d***h (6) £4.99 30/05/2018 13:33:01 1
W***r (33) £4.99 27/05/2018 18:06:28 1
x***a (31) £4.99 02/05/2018 13:28:43 1
p***o (26) £4.99 02/05/2018 11:25:42 1
Feedback on this Item
PositivePositive l***1 (24) Fantastic! Book in very good condition, well packed, fast delivery. Many thanks! 26/02/2019 17:14:53
PositivePositive x***a (31) Excellent service as always! 07/05/2018 11:45:10

Item Number : 32017

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The Sinclair QDOS Companion is an in-depth guide to the working of the Sinclair QL's operating system, QDOS and how to interface to it when writing machine code, including how to use its multitasking facility and how to link to peripherals.

Written by Andrew Pennell and published by Sunshine Books in 1985, The Sinclair QDOS Companion includes an overview of the Sinclair QL's second processor, the Intel 8049 chip which is used to handle peripheral devices, such as the keyboard and sound, and how to control it without using QDOS.

A useful guide and helpful for those just starting to learn how to program the Sinclair QL in 68000 assembly code, it suffers now from assuming that the system variables would always be stored at $28000 and the screen at $20000 which was not the case in later QL operating systems.

178 pages in very good condition

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Stoke-on-Trent, Staffordshire, United Kingdom
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