Tynemouth MINI PET 40/80, Technical Manual, Page: 27 / 28

Tynemouth MINI PET 40/80
27 www.tynemouthsoftware.co.uk V1.82
DATASETTES
The PET supports two datasettes, each of which uses the same datasette edge connector as the VIC20 and
Commodore 64, so you can use a C2N or 1530 datasette to load or save programs. Each drive is also wired to a
7 pin 0.1” pin header with pin 3 missing for polarisation.
Top Bottom Pin Header Signal
1 A 1 GND
2 B 2 +5V
- - - -
3 C 4 Motor
4 D 5 Read
5 E 6 Write
6 F 7 Switch
PET MONITOR
The monitor connector is used to drive the PETs internal monitor. The pinout is the same for both 9" and 12"
monitors, but the signal polarity is different. This is automatically set when selecting 9" or 12" monitor on the
video DIP switches (which also sets the appropriate frame rate).
Pin Signal 9" Monitor Polarity 12" Monitor Polarity
1 GND - -
- - - -
3 Horizontal Sync Active High Active Low
4 GND - -
5 Vertical Sync Active Low Active Low
6 GND - -
7 Video Inverted Normal
Four additional pins are included in the connector for future use. If using a PET monitor, only fit pins 1 and 3-7.
Pin Signal Function
8 RGBI Red / Blue DIP switch 10 selects 0V or the video signal (pin 7)
9 Composite Sync Composite Sync as used on Composite Video Out
10 5V 5V supply for external video circuitry
11 GND 0V