Ok here is what I got regarding CPU/FPU:
The GB A1000 motherboard can be used with either MC68EC030 or MC68030 processors (CPU) at clock frequencies between 40 and 50 MHz. The clock frequency is chosen by a quartz-oscillator on the motherboard. The clock frequency used must be adapted to the used CPU.
To increase the performance of floating point applications the GB A1000 motherboard can be equipped with a MC68881/2 co-processor (FPU). For this purpose the PCB is equipped with a 68 pin PGA socket. The FPU uses the same clock frequency as the CPU and therefore does not need its own oscillator.
