Original Commodore 64 Programmer's Reference Guide published by Commodore Business Machines, Inc. — not a modern reproduction. • First Edition, Eighth Printing — 1983• Copyright 1982• ISBN 0-672-22056-3• Reference number 22056• Original cover price $19.95• Covers BASIC, graphics, sprites, sound/SID, 6510 machine language, input/output, memory maps, KERNAL routines, chip specifications and more• Approximate unpackaged weight shown in photo: 1 lb 5.4 oz This is my personally owned period copy from the Commodore 64 era. It is a desirable original reference for a C64 collector, programmer, retro-computing display or restoration setup, but it is not a first printing. CONDITION: Well-used/acceptable. The plastic comb binding has substantial damage and broken sections. Covers have wear, staining, creases, rubbing and worn corners/edges. Pages are age-toned with handling wear. I did not inventory every page individually. Please review every photo closely for the exact copy and condition you will receive. Book only. No computer, software or other accessories included.