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Testing character generation

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Daniele Verducci su MatissePenguin 2021-01-24 12:13:17 +01:00
parent baa00e3ea0
commit 9de4753984
1 changed files with 15 additions and 9 deletions
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24
pat80-io-devices/composite-pal-adapter/software/avr-assembly/main.asm
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@ -67,23 +67,29 @@ main:
out DDRA, HIGH_ACCUM ; set port as output (contains video pin) out DDRA, HIGH_ACCUM ; set port as output (contains video pin)
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 ; test draw character routine
ser r3 ser r17
test_draw_loop: test_draw_loop:
ldi A, "P" ldi r16, 'P'
mov A, HIGH_ACCUM
call draw_char call draw_char
ldi A, "A" ldi HIGH_ACCUM, 'A'
mov A, HIGH_ACCUM
call draw_char call draw_char
ldi A, "T" ldi HIGH_ACCUM, 'T'
mov A, HIGH_ACCUM
call draw_char call draw_char
ldi A, "8" ldi HIGH_ACCUM, '8'
mov A, HIGH_ACCUM
call draw_char call draw_char
ldi A, "0" ldi HIGH_ACCUM, '0'
mov A, HIGH_ACCUM
call draw_char call draw_char
ldi A, " " ldi HIGH_ACCUM, ' '
mov A, HIGH_ACCUM
call draw_char call draw_char
dec r3 dec r17
breq test_draw_loop breq test_draw_loop