Multimapping Revisited – Connection Diagram
---------------------------
1 1
1 1 16 1
1 ------ 1
1 1 1 15 1
1 1 1---------o 1
3 1---1 1 1---o <--o--1
1 1--- 1 o
1 1 13 3 S1A
1 1
1 1
1 1
------ LKS1 - No other connections needed
8 9
1 S1B
Suggest unregulated 1------o
side of +12V supply +-------XXXXXXXX------1-----o <--o-----1
RLA1 2 o 1
3 1
=====
GND ===
Nascom Video -------------o RLA1
O--------------o Video o/p to
IVC Video -------------o monitor
(Reset to 4000H) 1
LSW1/2 PIN 19 -----------------------o LSW1/1, 1/4 UP
2 1---o <----o------1 LSW 1/2, 1/3 DOWN
1 1
LSW1/3 PIN 18 -----------------1-----o 1
(Reset to 2000H) 3 ===== S1C
=== GND
| 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.