Detail of the data bytes
• Byte: message general parameters
State 0 = no fault
State 1 = fault
* The bit 7 is significant on S4SI and S4SI Plus only.
* The bit 6 is not significant on S4SI and S4SI Plus only.
• Byte: Hard fault (CPU)
State 0 = no fault
State 1 = fault
6
5
4
3
2
1
0
7
RAM
unserviceable
VIA2 unserviceable
Autoclock
unserviceable
ACIA unserviceable
ROM
unserviceable
VIA4 unserviceable
VIA1 unserviceable
VIA3 unserviceable
Bit
6
5
4
3
2
1
0
* Motor cycle
Hard CPU
(VIAS, ACIA,
ROM, RAM, HORO)
Head 2 unserviceable
Head 1 unserviceable
* Ink pigment
circuit
Ink level low
Memory lost
Pressure
7
Bit
Protocol
A13862 Version E
Page 5-39