Jenway 6300 Ser Man
25
The operating system software is stored in the 64K by 8 bit
EPROM, IC106. This will have a label attached identifying the
software version and date it was programmed. Removal of this
label may damage the component and will invalidate the warranty.
IC103 is a 3 to 8 line address decoder that can select the peripheral
devices on the data bus, being the keypad interface through IC104
or the display driver IC200.
The watchdog circuit (IC100) monitors the activity of the
processor, while IC101 generates the correct levels for the RS232
output. The four amplifiers in IC300 form the D to A converter
which generates the analogue output.
