phantom bus accelerator & clock patch

[Steve]

Just some photos of the clock patch I made myself from the Phantom schematic, I *know* it isn't the prettiest but I was proud of myself

Schematic:

phan.png (51.45 KiB) Viewed 3380 times

Backside of my pcb:

IMG_20180510_182317.jpg (380.45 KiB) Viewed 3380 times

Front side of pcb:

IMG_20180511_134149.jpg (405.82 KiB) Viewed 3380 times

Connection to DSP line:

IMG_20180511_134410.jpg (370.94 KiB) Viewed 3380 times

Connection to SDMA line with capacitor to ground:

IMG_20180511_134446.jpg (318.1 KiB) Viewed 3380 times

[exxos]

Cool.

I actually found the capacitor made things worse.

Looks like the second chip does a inversion.. 40ns delay at 25mhz.. but with the delays of the chip, its probably more like a buffer..

[Steve]

Also ctirad recommended for me to add these extra capacitors to my clock patch, but for some reason the Falcon wouldn't boot afterwards. Still, I took a photo for my records. I had to remove the capacitors afterwards. I think I remember him saying it was strange, apparently it should have just smoothed out the voltage a bit more.

IMG_20180512_183759.jpg (166.29 KiB) Viewed 2166 times