Tibbo EM1000 - Page 281

270Tibbo Project System (TPS)
© Tibbo Technology Inc.
GND, +5V, +15V, and -15V rails were already explained in Tibbit Power Lines.
Eight control lines of the tile -- four per "M" socket -- go to the TPP's CPU.
"C" sockets and "M" sockets are interconnected directly (see eight short black
lines).
A word on the naming of control lines. "M" sockets (these are (S5) and (S7) on the
diagram above) have control lines A, B, C, and D. M1 Tibbits have a matching set of
control lines A-D. M2 Tibbits have eight control lines A-H. When you plug an M2
device into the tile, its control lines correspond to the control lines of the tile as
follows:
M2
Tibbit
Corresponding control
line on a tile
A
First "M" socket*, A
B
First "M" socket*, B
C
First "M" socket*, C