01: It has been tested with an Atari STFM.
02: The chip (IC1) is a 74LS86.
03: All resistors are 250mW 5%. C1 is a 100nF capacitor, the type and voltage rating are not critical, but I suggest a ceramic type.
04:
05: I used the P9 power connector on the GBS-8200 V4.0 board to "steal" a +5V supply for this circuit. Red is +5V, black is 0V/GND.
06: Connect the Atari STF(M)/STE up as per the table below.
07: On the schematic diagram, the output is called "Comp Sync out" but in the table I refer to the same signal as CSync.
08:
09: Code: Tout s�lectionner
10: Atari signal wire colour GBS-8200 V4.0 board
11: 13 pin DIN P11 connector
12: 6 ------green video---green wire------------"G"
13: 7 ------red video-----red wire--------------"R"
14: 9 ------HSync---------to 78LS86 circuit
15: 10 ------blue video----blue wire-------------"B"
16: 12 ------VSync---------to 78LS86 circuit
17: 13 ------Ground--------black wire------------"GND"
18: CSync from----grey wire-------------"S"
19: 78LS86 circuit
20: No connection-yellow wire-----------"VS"