AVR Pocket Programmer -> V3 ISP cable header pinout

avrdude -c usbtiny (when using this programmer device: instead of -c bsd or -c stk200, as might appear in instructions)
AVR Pocket Programmer ISP header:
_______________
|01 03 05 07 09|
|02 04 06 08 10|
|_____|--|_____|

1 	VCC
2  	MOSI
3  	GND
4  	NC
5  	GND
6  	RST
7  	GND
8  	SCK
9  	GND
10 	MISO

IMPORTANT: the "AVR Pocket Programmer" has a small SMD switch. 

A) Switch programmer to "NO-POWER" so that it does NOT try to supply the target device VEMS v3.
B) NOTE: remove the SD-card if installed (take a picture or take note how it was installed).
C) plug in correctly (see pinouts; see picture on URL below if uncertain), verify
D) power up programmer, by plugging into USB
E) power up v3 from EC36/pin25 +12V (do this soon after D; preferrably within 1-2 seconds)
F) start the programming, verification, lock: avrdude -c usbtiny ... Supply voltage should be stable during these operations (~3 minutes).

G) power down v3, unplug programmer from USB

Z) when all is good: unplug from the ISPI connector

Note: other programmers, like DSUB25 parallel port programmers are also possible (often can be built from PC-scrap in the basement, only 5 wires: GND, RST, SCK, PDI=ISP MOSI, PDO=ISP MISO), See the DSUB25 side pinout, the parallel-pins about the "stk200" or "bsd" cable in avrdude docs.
==================
VEMS V3 ISP pinout (v3.x including v3.0 - at least v3.8 ) also called ISPI connector.

IMPORTANT: VERIFY (before connecting) that the cable of your AVR Pocket Programmer has been modified to match this pinout.

		|
		|    uC
		|   atmega128
		|_______

6 unused, 6 used pins
___________________
|01 03 05 07 09 11|
|02 04 06 08 10 12|
|_________________|

1  NC
2  NC
3  NC
4  NC
5  NC
6  NC
7  RST (RESET)
8  GND  (on v3 mainboard, this pin has some patch around it, "ground-fill", verify)
9  SCK
10 PDI = ISP MOSI
11 PDO = ISP MISO
12 VCC (or NC with AVR-ISP switched to "NO-POWER", as recommended with V3) ; VCC when AVR-ISP switched to "POWER TARGET", which is NOT recommended as V3 is powered from EC36/pin25 +12V) 

====== useful URL-s :
Image shows an ISP cable-connector plugged in VEMS v3 : 6 NC pins (=3*2 Not Connected, unused) : 
http://vems.hu/vt/help/v3/general/bootloader_upgrade.html

https://shop.vems.hu/catalog/cable-p-165.html  Purchase the AVR-ISP USB device here (and URL of printable version of this paper).