How to reset the 5200 manually using the lines from the cartridge?

[unebonnevie]

Hi,

 

I would like to construct a cartridge board so that I can press a button to reset the 5200. Is that possible? (I realize that I can hook up a button to the 6502C's /RESET pin, but I am not looking that route.)

 

I read the below from http://www.atarimuseum.com/videogames/consoles/5200/conv_to_5200.html, but I am kind of not getting it. So, I put a digital 1 (5V) on the two interlock pins to do a reset system and digital 0 (0V) is not to reset the system?

 

The cartridge ROM can be 32K bytes long and resides in

memory from $4000 to $BFFF. Figure 4 shows the pinout of the
cartridge slot. The two interlock connectors are wired
together on a cartridge board. The 5200 uses this as a
switch for the cartridge's power connections and as a Reset
signal. Therefore, a cartridge may be safely removed or
inserted while the 5200 is powered on.


D0 1 36 Interlock
D1 2 35 A11
D2 3 34 A12
D3 4 33 A10
D4 5 32 A13
D5 6 31 A9
D6 7 30 Audio In (2 port)
D7 8 29 A8
Enable 80-8F 9 28 Not Connected
Enable 40-7F 10 27 A7
Not Connected 11 26 +5V DC
Ground 12 25 Ground
Ground 13 24 Ground (Video In on 2 port)
Ground (System Clock
02 on 2 port) 14 23 Ground
A6 15 22 A4
A5 16 21 A3
A2 17 20 A1
Interlock 18 19 A0

 

Thanks!

Edited August 25, 2016 by unebonnevie

[Rybags]

The CI1 and CI2 pins are simply joined by a trace on a cartridge, having a switch that opens that circuit would perform the same function as removing the cart.

 

Not sure though if that's a reset, might be more like a power down.

You can trawl through this schematic, it's got the circuit around upper left corner:

 

 

 

[Bryan]

The 5200 has a soft-power circuit that enables 5V to the board when the power button is pressed. This requires that the two interlock pins be joined by a cartridge. All you can do by breaking them is turn the console off.