Epson PC AX Technical Manual page 113

REV.A
(4)
PRINCIPLES OF OPERATION
In AT mode, the typematic rate/delay time and key code output mode
will be set according to mode (b).
Rate
Delay
10 .9 CP S (92 ms)
500 ms
Default
Default
2.5.6.5. Initializing (XT mode)
The clock Une is checked in 10 ms cyc1es by keyboard and initializing is
performed as soon as a low level signal is detected.
(1) Key scan memory clear
(2) Buffer (FIFO) clear
(3) Self-test program performed
. ROM sum check
. RAM check
self-test program
self-test program
(4) Transmission of self-test program end code
" A.AlI"
"FeH"
Operated correctly
Operated abnormally (scanning is stopped after
transmission of the end code.)
2.5.6.6 Data Wait Function (XT mode)
When the start bit is set, the data line is checked by the keyboard and if a
low level signal (longer than 250 us) is detected in the data 1 ine, data
transmission will not take place.
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