Canon A-200 series Service Manual page 122

Start O-RAM refresh Set up Timer 1 Set dummy stack
Check the OMAC
Set video interrupt vector address-
YES
Enable parity error
Check hot interrupt
Initialize the DMAC
YES
Initialize the PIC
(I)
YES
Check Timer
0
YES
Check System RAM
(OOOOO-OFFFF)
YES
Initialize Timer
0
( HALT)