IngoQ wrote: ↑Mon Oct 09, 2017 4:14 pm
Never seen this before, apparently you can use plated half holes at the edges of your PCB and solder these to SMT pads...
Probably just normal vias and they cut the pcb "mid hole".
IngoQ wrote: ↑Mon Oct 09, 2017 4:14 pm
So in theory, you could make a PCB that could be soldered directly on the STEs mainboard.
Sadly the resulting PCB would be smaller than the funky pinout at the bottom of the booster, so simply having pin headers sticking upwards would not work. Unless you use a second PCB...
I think this is getting overcomplicated now.. I think as suggested previously, the V1.5 booster may be a better option.
Saying that, if you soldered the HC CPU direct to the motherboard, and just isolated the clock and run it via the booster PCB, then you do not need many more signals linked to the booster PCB in order for it to work.
Basically just RW, BG, BR, BGACK, AS.
If you just wire linked these direct to the CPU, or anywhere really on the motherboard, and rooted these to the CPU socket on the booster, these are the only wires you really need to route. Aside from the CPU CLK way would need to probably lift the pin on the CPU itself to isolate it, run that to the booster socket, and then the remaining pad on the motherboard is your 8 MHz CLK where you run to the booster also.
This way you are only needing to break one connection, and solder five wires not the whole CPU.
Also you will need to change the resistor packs on the motherboard for 2.2K ones, as the ones on the booster board will be isolated from the CPU.
I think overall this would be a lot easier option for you..