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@Stosstruppe

PC-88 機械語で文字出力

Last updated at Posted at 2018-07-21

参考
PC-8801 I/Oマップ

db 71           in      a, ($71)        ; 拡張ROMセレクト
f5              push    af
3e ff           ld      a, $ff          ; メインROM
d3 71           out     ($71), a

; putc
3e xx           ld      a, xx
df              rst     $18             ; OUTIO
f6 xx           or      xx
df              rst     $18

; puts
21 xx xx        ld      hl, xxxx
cd 50 55        call    $5550

f1              pop     af
d3 71           out     ($71), a
c9              ret

putc.png

puts.png

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