comfile

我自己写的vhdl程序

-- screen is initially cleared to black ('0') state
--draw a white star
MW 12 12
DW 32 32
MW 12 22
DW 32 32
MW 12 32
DW 32 32
MW 12 42
DW 32 32
MW 12 52
DW 32 32
MW 22 12
DW 32 32
MW 22 52
DW 32 32
MW 32 12
DW 32 32
MW 32 52
DW 32 32
MW 42 12
DW 32 32
MW 42 52
DW 32 32
MW 52 12
DW 32 32
MW 52 22
DW 32 32
MW 52 32
DW 32 32
MW 52 42
DW 32 32
MW 52 52
DW 32 32
-- draw a white square
MW 0 0
CW 10 10
-- draw to invert colour lines in the square
DI 0 0
MW 0 10
DI 10 0
-- flush pixels - two commands in case RAM write has not finished
FB 0 0
FB 0 0
-- these tests are NOT comprehensive - add your own!