80-Bus News

  

January–March 1982, Volume 1, Issue 1











Page 45 of 55











45

MULTIMAPPING REVISITED – CONNECTION DIAGRAM

1 1 1 ol 16 1 S1 – 3 POLE, 3 WAY ROTARY Lo ween 1 1 oi 115 1 1 RLA – 12 volt with at least 1 i 1--------- o 1 1 changeover contact. 3 l---1 1 l---0 €--o---1 e.g. RS 347-832 1 le-- 1 ‘ 1 113 3 SIA 1 1 1 1 1 l ee LKS1 – No other connections needed. 8 9 1 S1B Suggest unregulated l------ oO side of +12V supply + ------- XXXXXXXK 1 0 €--0 1 RLAL 2 0 1 3 1 GND === Nascom Video -------------- o RLAL 0------------—— o Video o/p to IVC Video senna n------ ‘ monitor (Reset to 4000H) 1 LSW1/2 PIN 19 ‘ LSW1/1, 1/4 UP 2 |e--0 €----9------- 1 LSW 1/2, 1/3 DOWN 1 lL LSW1/3 PIN 18 1 ‘ 1 (Reset to 2000H) 3 saomarsrss sic Position 1 – Nas-Sys and normal Nascom Video/Workspace " 2- CP/M " Nascom Video/Workspace at F800H

" 3 – CP/M "™ Gemini GM812 IVC card

This is for use with 64K of RAM, however made up. If a lesser amount of RAM is used, certain firmware would have to reside on either the Nascom 2 board, RAM A card or a ‘Paged in’ EPROM card, and switching would need to be modified accordingly.


This is an OCR’d version of the scanned page and likely contains recognition errors.











Page 45 of 55