penguin86/pato-z80-home-computer
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Testing char drawing routine

Browse Source
This commit is contained in:
Daniele Verducci (ZenPenguin) 2021-01-24 11:48:35 +01:00
parent f49818caa1
commit baa00e3ea0
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
pat80-io-devices/composite-pal-adapter/software/avr-assembly/main.asm
View File

@ -68,6 +68,23 @@ main:
ldi HIGH_ACCUM, 0x00 ldi HIGH_ACCUM, 0x00
out DDRB, HIGH_ACCUM ; set port as input (used as data bus) out DDRB, HIGH_ACCUM ; set port as input (used as data bus)
; test draw character routine
ser r3
test_draw_loop:
ldi A, "P"
call draw_char
ldi A, "A"
call draw_char
ldi A, "T"
call draw_char
ldi A, "8"
call draw_char
ldi A, "0"
call draw_char
ldi A, " "
call draw_char
dec r3
breq test_draw_loop
; *** timer setup (use 16-bit counter TC1) *** ; *** timer setup (use 16-bit counter TC1) ***