Service manual

Service Manual
Probe_PutByte
(SWI &C8009)
Write a 8-bit byte to the interface hardware
On entry
R1 = byte to write
On exit
R0 = result status
Interrupts
May be enabled
Processor mode
SVC mode
Re-entrancy
Not re-entrant
Use
To perform low-level operations required to transfer
data for the SWIs &C8000 to &C8004.
Related SWIs
Probe_Poll, Probe_PutWord, Probe GetWord
Probe_PutByte, Probe_GetByt, Probe_GetSlow
Related vectors
None
Probe_GetSlow
(SWI &C800A)
Read a byte slowly from the interface hardware
On entry
R0 target address
On exit
R0 = result status
R1 = byte read
Interrupts
May be enabled
Processor mode
SVC mode
Re-entrancy
Not re-entrant
Use
To read data normally intended for the LCD module.
This SWI is similar to Probe_GetByte, but ensures
that the data remains latched on the interface
sufficiently long to permit the LCD module to accept
the data.
Related SWIs
Probe_Poll, Probe_PutWord, Probe_GetWord
Probe_PutByte, Probe_GetByte, Probe_GetSlow
Related vectors
None
5-22 Issue 2, June 1991 Part 5 - Main PCB fault diagnosis