kb0jjn
New member
I have installed my Galaga renue kit and started testing. Voltages are good about 5.02 and 11.5. The problem I am having is my clocks are high on all of the z80s. I probed around and have found a clock signal on chip 5a but not much else. My schematics are a bit off also. I can't seem to find it now but the board numbers were off.
The board I am currently working on is a Bosconian cpu A084-91412-B550. The schematic I am looking at shows 5a as a 157 and the chip at that location on my board is a 74ls368an. My schematic show pins 3 14 with a 6mhz clock. I think the clock signals I found were on pins 5 and 6.
Now I have told others to look for a clock at the cpu and without the clock the cpu will never start. Now I need to find a proper schematic for this board and a clock signal.
Any help at all will be gladly accepted.
The board I am currently working on is a Bosconian cpu A084-91412-B550. The schematic I am looking at shows 5a as a 157 and the chip at that location on my board is a 74ls368an. My schematic show pins 3 14 with a 6mhz clock. I think the clock signals I found were on pins 5 and 6.
Now I have told others to look for a clock at the cpu and without the clock the cpu will never start. Now I need to find a proper schematic for this board and a clock signal.
Any help at all will be gladly accepted.