Core Register Set | VM-112
Core Machine Registers.
R0	Data Register	Assemble input data here.
R1	Address Register	Register address pointer.
R2	Source Address Register	Source register address pointer.
Data Capture Registers.
R3	Sample Pre-load (Low Byte)	Spock Counter/RAM address (low byte).
R4	Sample Pre-load (High Byte)	Spock Counter/RAM address (high byte).
R5	Trigger Logic Byte	Logic values to match for trigger.
R6	Trigger Mask Byte	Don't care logic values for trigger.
R7	Spock Option Byte	Trigger and PG1 setup in Spock.
R9	Counter Capture (Low Byte)	Spock Counter/RAM address capture (low byte).
R10	Counter Capture (High Byte)	Spock Counter/RAM address capture (high byte).
R14	Input/Attenuation	Alt/Chop channel input/attenuation settings.
R15	Dump Size	Number of samples dumped per request.
Trace Mode & Delay Registers.
R8	Trace Register	Trace mode selection.
R11	Post Trigger Delay (Low Byte)	Delay after trigger (low byte).
R12	Post Trigger Delay (High Byte)	Delay after trigger (high byte).
R13	Time-base Expansion	Time-base expansion factor.
R20	Pre-Trigger Delay	Programmed to pre-fill buffer before trigger match.
EEPROM & POD Registers.
R16	EEPROM Data	EEPROM Data Register.
R17	EEPROM Address	EEPROM Address Register.
R18	POD Transmit	Byte sent to POD.
R19	POD Receive	Byte received from POD.
Frequency Measurement Registers.
R21	Frequency Timer Pre-Load	Number of signal cycles to count.
R22	Frequency Pre-scale	Input frequency pre-scale divider.
R23	Period Pulse Count	Used for period measurements.
Additional Registers | VM-120
Analogue Dump Registers.
R24	Mode Select	Specifies dump mode (0..3).
R25	Mark Register	Process this many bytes.
R26	Skip Register	Skip this many bytes.
R27	Repeat Count	Repeat this number of times.
Event Scan Registers.
R28	Mode Select	Specifies scan mode (0..3).
R29	Scan range (Low Byte)	Number of samples to scan (low byte).
R30	Scan range (High Byte)	Number of samples to scan (high byte).
R31	Positive Transition Level	Level to compare agains't (00..FF).
R32	Negative Transition Level	Level to compare agains't (00..FF).
Delayed Trace Mode Registers.
R33	Mode Select	Specifies delayed trace mode (0..3).
R34	Delay Counter (Byte 0)	Delay duration timer, 2 uS units, (byte 0).
R35	Delay Counter (Byte 1)	as above (byte 1).
R36	Delay Counter (Byte 2)	as above (byte 2).
R37	Delay Counter (Byte 3)	as above (byte 3).
R38	Capture Counter (Byte 0)	Capture duration timer, 2 uS units, (byte 0).
R39	Capture Counter (Byte 1)	as above (byte 1).
R40	Capture Counter (Byte 2)	as above (byte 2).
R41	Capture Counter (Byte 3)	as above (byte 3).
R42	Slow Clock Sample Counter (Byte 0)	Sample counter (byte 0).
R43	Slow Clock Sample Counter (Byte 1)	as above (byte 1).
R44	Pre-Trigger Filter	Filter control pre-trigger
R45	Post-Trigger Filter	Filter control post-trigger.
Logic Trace Mode Registers.
R46	Mode Select	Specifies logic trace mode (0,1,4).
R47	Logic Sample Rate	Specifies the logic sample rate.
Additional Registers | VM-220
R61	POD Start Cell Width	Specifies POD I/O Start Cell Width.
R62	POD Bit Cell Width	Specifies POD I/O Bit Cell Width.
R63	Baud Rate Divisor	Specifies the USART Baud Rate.