Sinclair ZX81, Assembly Instructions Manual, Page: 28 / 43

INCREMENTAL SERIES - DOCUMLHTATI ON
PLEASE NOTE ! - the position of the 40 protruding pins protected by the clock
o
f
polystyrene foam. We suggest that this protection be retained until actual
fitting. Also we strongly recommend the fitting and testing of the memory
board as supplied before carrying out any adjustment to switch settings,
plugging- in extra chips etc.. Finally, from "bitter experience, we think
it aorth reading the instructions right through before doing anything
else.
Supplied by: EAST LONDON ROBOTICS,
Finlandia House,
14, Darwell Close,
East Ham,
LONDOS E6 4BT .
CONTENTS^
1. FITTING
FITTING
REMOVING
FITTING OF ADDITIONAL MEMORY CHIPS
2. TESTING
TESTING
3. RUNNING ALONGSIDE OTHER MEMORIES
General Notes
16K RAM packs
32K SAM packs
48K RAM packs
8K RAM packs
Others
4. HINTS and TIPS
Extracting chips from their sockets
Insertion of chips into their sockets
Pin numbers of chips.
APPENDIX A - Incremental Board Layout - Side 1
Incremental Board Layout - Side 2
APPENDIX B - PLUG & SOCKET SWITCH SETTINGS
General Notes
Table of socket positions.
Examples