In Table 11-3, p180 of http://ww1.microchip.com/downloads/en/DeviceDoc/70000657H.pdf, there is no way to map any spi1 pins?!
I've gotten spi2 pins to work, but I need two buses and the part was specifically chosen because it had two spi peripherals. Is the documentation lacking? Is there something simple I'm missing? Part of me is tempted to just guess every binary combo of 6 bits.
The errata here seems to have no helpful mention either: http://ww1.microchip.com/downloads/en/DeviceDoc/80000533g.pdf