Vectrex Cartridge

Available at Vectrex console.

Pinout

Pin	Description
1	*HALT
2	Vcc	+5VDC
3	A7
4	Vcc	+5VDC
5	A6
6	A8
7	A5
8	A9
9	A4
10	A11
11	A3
12	*OE	Inverted copy of 'E' clock from CPU. Valid CPU access when E is high
13	A2
14	A10
15	A1
16	*CE	A15 from CPU according to the nut. ;) However, the commercial carts I've seen use this line for chip enable.
17	A0
18	D7
19	D0
20	D6
21	D1
22	D5
23	D2
24	D4
25	GND
26	D3
27	GND
28	GND
29	A12
30	R/*W	Note: unused on many carts
31	A13
32	*CART	Active low Cartridge enable - low when E is high and A15 low. Although I verified that it seems to work, many carts do not use it.
33	A14
34	*NMI
35	?	Port B, Bit 6 of the 6522 PIA (software controlled line)
36	*IRQ