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6 - STMicroelectronics Programming Tools
DC.W 0
DC.W 0
DC.W 0
DC.W 0 ; skip 7 vectors
DC.W 0
DC.W 0
DC.W 0
DC.W 0
DC.W 0
DC.W 0
DC.W reset ; reset vector ($FFFE)
END
The main program calls the following subroutine that has been written in a separate file on pur-
pose, though it would be easier to write it in the main source file:
ST7/
;=============================================================
;= timer 0.5 second =
;=============================================================
; This subroutine generates a 500ms timing by looping.
PUBLIC Delay500
#include "Register.inc"
; definition of the constants
; ===========================
BYTES ; The following constants are defined as 1 byte values
watch EQU $FF
DELAY1 EQU 10
DELAY2 EQU 100
DELAY3 EQU 140
; definition of the variables (in page 0)
; ==================================
segment 'ram0'
Time: ds.b 3 ; reserve memory space in RAM for
; a page zero variable named Time,
; that is 3 byte long.
segment 'rom'
WORDS
; Timing routine for 500ms
; =====================================
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