Hi, I cleaned the dust out of a small 4 slot card cage with the power supply at the right side. I was never good at naming the BA box types, so here is the description. When you look at the front side, the 4 slots are at the left side, and the PSU is at the right side and has at the front 3 switches (DC on/off, enable/halt, and LTC on/off) and 2 LEDs (DC on and run). The following cards are installed (I have not yet powered up this unit). <------ M7270 ------> <------ M8044 ------> ================== <------ empty ------> <------ M7940 ------> | o o __ __ __ | <------ empty ------> <------ empty ------> | ~~ ~~ ~~ | <------ empty ------> <------ empty ------> ================== I have 2 questions from this system. 1) As I am not that familiar with QBUS, are the cards in the correct slot? 2) The M8044 says on the handle "M8044-DK" but on the board is in the etch "M8045" and "16KW x 18 BIT" (IIRC that last part). Strange or common ? An other thing is the following. I also have a M7264. This board is quad sized, but has 4 kW memory on the CPU board. The M7270 is dual sized (with no RAM). Can I remove the M7270 and M8044 and put the M7264 instead in the above rack? The reason for this swap is that I hoipe one day to add a M8018 (WCS), and as far as I know, the WCS option does not work with the M7270, but only with the M7264. Is this correct? And *if* the M7264 is installed, can I then move the M7940 to the left in the same slot and put in the open space the M8044? A lot of questions ... I am really into UNIBUS machines, but this small system is too cute to put away! thanks, - Henk, PA8PDP.