75XX Syscon

The syscon core is at 0x60. For example, to read the "Model ID" register:

ts7500ctl --address=0x60 --peek16

Offset	Bits	Access	Function
0x60	15-0	Read Only	Model ID
0x62	15	Read/Write	Green LED (1 = on)
	14	Read/Write	Red LED (1 = on)
	13	Read/Write	RTC SCL input
	12	Read/Write	RTC SDA input
	11	Read/Write	RTC SCL direction (1 - output)
	10	Read/Write	RTC SDA direction (1 - output)
	9	Read/Write	RTC SCL output
	8	Read/Write	RTC SDA output
	7-4	Read Only	Board submodel
	3-0	Read Only	FPGA revision
0x64	15-0	Read Only	16-bits of random data changed every 1 second.
0x66	15-12	Read Only	DIO input for pins 40(MSB)-37(LSB)
	11-8	Read/Write	DIO output for pins 40(MSB)-37(LSB)
	7-4	Read/Write	DIO direction for pins 40(MSB)-37(LSB) (1 - output)
	3	Read/Write	Lattice tagmem clock
	2	Read/Write	Lattice tagmem serial-in (RW)
	1	Read/Write	Lattice tagmem CSn
	0	Read Only	Lattice tagmem serial-out (RO)
0x68	15-0	Read Only	DIO input for pins 36(MSB)-21(LSB)
0x6a	15-0	Read Only	DIO output for pins 36(MSB)-21(LSB)
0x6c	15-0	Read/Write	DIO direction for pins 36(MSB)-21(LSB) (1 - output)
0x6e	15-0	Read/Write	DIO input for pins 20(MSB)-5(LSB)
0x70	15-0	Read/Write	DIO output for pins 20(MSB)-5(LSB)
0x72	15-0	Read/Write	DIO direction for pins 20(MSB)-5(LSB) (1 - output)
0x74	15-0	Write Only	#Watchdog feed register
0x76	15-11	N/A	Reserved
	10-6	Read/Write	PLL phase (set by TS-BOOTROM)
	5	Read Only	mode3 latched bootstrap bit
	4	Read/Write	Reset switch enable (1 - auto reboot when dio_i[9] == 0)
	3-2	Read/Write	scratch reg
	1	Read Only	mode2 latched bootstrap bit
	0	Read Only	mode1 latched bootstrap bit