はじめに

PASTA/80 を使って PC-G850 シリーズ用にキーテストプログラムを作ってみたいと思います。

キーテストプログラム

プログラムコードは次の通りです。

KeyTest.pas

program KeyTest;
{$u+}
{$i rtl\g850grph.pas}
type
  TPoint = record
    x: byte;
    y: byte;
  end;  
const
  Data: array [0..53] of array [0..15] of Byte = 
  (
    ($FF, $FF, $FF, $FF, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F),
    ($1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F),
    ($1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F),
    ($1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F),
    ($1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F),
    ($1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $1F, $FF, $FF, $FF, $FF, $00),
    ($00, $00, $DF, $51, $51, $51, $51, $DF, $00, $00, $DF, $51, $51, $51, $51, $DF),
    ($00, $00, $DF, $51, $51, $51, $51, $DF, $00, $00, $DF, $51, $51, $51, $51, $DF),
    ($00, $00, $DF, $51, $51, $51, $51, $DF, $00, $00, $DF, $51, $51, $51, $51, $DF),
    ($FF, $FF, $FF, $FF, $00, $00, $00, $41, $7F, $41, $00, $00, $7C, $08, $04, $04),
    ($78, $00, $7F, $10, $28, $44, $00, $00, $38, $54, $54, $54, $18, $00, $0C, $50),
    ($50, $3C, $00, $00, $00, $36, $36, $00, $00, $00, $00, $00, $00, $00, $00, $00),
    ($00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00),
    ($00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00),
    ($00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $FF, $FF, $FF, $FF, $00),
    ($00, $00, $F7, $14, $14, $14, $14, $F7, $00, $00, $F7, $14, $14, $14, $14, $F7),
    ($00, $00, $F7, $14, $14, $14, $14, $F7, $00, $00, $F7, $14, $14, $14, $14, $F7),
    ($00, $00, $F7, $14, $14, $14, $14, $F7, $00, $00, $F7, $14, $14, $14, $14, $F7),
    ($FF, $FF, $FF, $FF, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0),
    ($C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0),
    ($C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0),
    ($C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0),
    ($C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0),
    ($C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $C0, $FF, $FF, $FF, $FF, $00),
    ($00, $00, $7D, $45, $45, $45, $45, $7D, $00, $00, $7D, $45, $45, $45, $45, $7D),
    ($00, $00, $7D, $45, $45, $45, $45, $7D, $00, $00, $7D, $45, $45, $45, $45, $7D),
    ($00, $00, $7D, $45, $45, $45, $45, $7D, $00, $00, $7D, $45, $45, $45, $45, $7D),
    ($BE, $A2, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $BE, $80, $80),
    ($3E, $22, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $BE, $80, $80),
    ($3E, $22, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $BE, $80, $80),
    ($3E, $22, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $BE, $80, $80),
    ($3E, $22, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $BE, $80, $80),
    ($3E, $22, $A2, $A2, $A2, $BE, $80, $80, $3E, $22, $A2, $A2, $A2, $A2, $BE, $00),
    ($00, $BE, $A2, $A2, $A2, $A2, $A2, $BE, $00, $00, $00, $BE, $A2, $A2, $A2, $A2),
    ($A2, $BE, $00, $00, $00, $BE, $A2, $A2, $A2, $A2, $A2, $BE, $00, $00, $00, $BE),
    ($A2, $A2, $A2, $A2, $A2, $BE, $00, $00, $00, $BE, $A2, $A2, $A2, $A2, $A2, $BE),
    ($EF, $28, $28, $28, $28, $28, $28, $2F, $20, $20, $EF, $08, $08, $E8, $28, $2F),
    ($20, $20, $EF, $08, $08, $E8, $28, $2F, $20, $20, $EF, $08, $08, $E8, $28, $2F),
    ($20, $20, $EF, $08, $08, $E8, $28, $2F, $20, $20, $EF, $08, $08, $E8, $28, $2F),
    ($20, $20, $EF, $08, $08, $E8, $28, $2F, $20, $20, $EF, $08, $08, $E8, $28, $2F),
    ($20, $20, $EF, $08, $08, $E8, $28, $2F, $20, $20, $EF, $08, $08, $E8, $28, $2F),
    ($20, $20, $EF, $08, $08, $E8, $28, $2F, $20, $20, $3F, $00, $00, $00, $FF, $00),
    ($00, $EF, $28, $28, $28, $28, $28, $EF, $00, $00, $00, $EF, $28, $28, $28, $28),
    ($28, $EF, $00, $00, $00, $EF, $28, $28, $28, $28, $28, $EF, $00, $00, $00, $EF),
    ($28, $28, $28, $28, $28, $EF, $00, $00, $00, $EF, $28, $28, $28, $28, $28, $EF),
    ($03, $02, $02, $22, $72, $22, $02, $02, $02, $FA, $8B, $88, $88, $8B, $8A, $8A),
    ($8A, $FA, $03, $00, $F8, $8B, $8A, $8A, $8A, $8A, $8B, $88, $88, $8B, $8A, $8A),
    ($8A, $8A, $8B, $88, $88, $8B, $8A, $8A, $8A, $8A, $8B, $88, $88, $8B, $8A, $8A),
    ($8A, $8A, $8B, $88, $88, $8B, $8A, $8A, $8A, $8A, $FB, $00, $00, $FB, $8A, $8A),
    ($8A, $8A, $FB, $00, $00, $FB, $8A, $8A, $8A, $8A, $FB, $00, $00, $FB, $8A, $8A),
    ($8A, $8A, $FB, $00, $00, $FB, $8A, $8A, $8A, $8A, $FA, $02, $02, $02, $03, $00),
    ($00, $FB, $8A, $8A, $8A, $8A, $8A, $FB, $00, $00, $00, $FB, $8A, $8A, $8A, $8A),
    ($8A, $FB, $00, $00, $00, $FB, $8A, $8A, $8A, $8A, $8A, $FB, $00, $00, $00, $FB),
    ($8A, $8A, $8A, $8A, $8A, $FB, $00, $00, $00, $FF, $80, $80, $80, $80, $80, $FF)
  );
  Pt: array [0..9] of array [0..7] of TPoint = 
  (
    ((x:131;y:  1), (x:  9;y: 26), (x: 17;y: 26), (x: 25;y: 26), (x: 33;y: 26), (x: 41;y: 26), (x: 49;y: 26), (x: 57;y: 26)),
    ((x: 11;y: 32), (x: 19;y: 32), (x: 27;y: 32), (x: 35;y: 32), (x: 43;y: 32), (x: 51;y: 32), (x: 59;y: 32), (x: 67;y: 32)),
    ((x: 14;y: 38), (x: 22;y: 38), (x: 30;y: 38), (x: 38;y: 38), (x: 46;y: 38), (x: 54;y: 38), (x: 62;y: 38), (x: 70;y: 38)),
    ((x: 99;y:  1), (x:107;y:  1), (x:  1;y: 32), (x: 10;y: 44), (x:  1;y: 26), (x: 21;y: 44), (x: 78;y: 44), (x: 78;y: 38)),
    ((x: 70;y: 44), (x: 86;y: 44), (x:123;y:  1), (x: 98;y: 44), (x:108;y: 44), (x:118;y: 44), (x:128;y: 44), (x:138;y: 44)),
    ((x: 75;y: 32), (x: 83;y: 32), (x:115;y:  1), (x: 98;y: 38), (x:108;y: 38), (x:118;y: 38), (x:128;y: 38), (x:138;y: 32)),
    ((x: 65;y: 26), (x: 73;y: 26), (x: 62;y: 44), (x: 98;y: 32), (x:108;y: 32), (x:118;y: 32), (x:128;y: 32), (x:138;y: 26)),
    ((x: 81;y: 26), (x: 89;y: 26), (x: 99;y: 19), (x: 98;y: 26), (x:108;y: 26), (x:118;y: 26), (x:128;y: 26), (x:139;y: 19)),
    ((x: 99;y: 13), (x:107;y: 13), (x:107;y: 19), (x:115;y: 19), (x:123;y: 19), (x:131;y: 19), (x:131;y: 13), (x:139;y: 13)),
    ((x: 99;y:  7), (x:107;y:  7), (x:115;y:  7), (x:115;y: 13), (x:123;y: 13), (x:123;y:  7), (x:131;y:  7), (x:139;y:  7))
  );  
var
  Keys: TKeyArray;
  i, l, v: Byte;
begin
  FillScreen(clWhite);
  SetBGAddr(Addr(Data));
  while True do
  begin
    RestoreBG;
    v := Inkey;
    if v <> 0 then
    begin
      GotoXY(7, 1);
      Write(v);
    end;  
    ScanKeyboard(Keys);
    for l:=0 to 9 do
    begin
      v := 1;
      for i:=0 to 7 do
      begin
        if (Keys[l] and v) <> 0 then
        begin
          FillShape(Pt[l, i].x, Pt[l, i].y, clBlack);
          if (l = 4) and (v = $80) then
            FillShape(91, 32, clBlack);
//        GotoXY(10, 1);
//        Write('(', i:1, ',', l:1, ')');  
        end;  
        v := v shl 1;
      end;
    end;  
    RepaintLCD;
  end;
end.

実行するとこんな感じになります。押されたキーの場所が黒く表示され、単一のキーを押した場合にはそのキーコード (ASCII コードではない) が表示されます。

おわりに

機械語でキースキャン (OUT(11h) や OUT(12h)) を連続で行なう場合には、IN(10h) で読み出す前にいくらかのウェイトが必要なようです。

具体的には次のようにノーウェイトで設定＆読み出しすると、2 回目の読み出し時 (IN(10h)) に前回の値と同じものが入ってくる事があります。

ld a, 01h
out (11h), a
in a, (10h)
...
ld a, 02h
out (11h), a
in a, (10h)
...

11h の bit0 からノーウェイトで読むと同じビットのキーが押されたようになります。例えば上記例だと〔Q〕 を押すと 〔S〕 も押されたようになってしまいます。

bit	[0]	[1]	[2]	[3]	[4]	[5]	[6]	[7]	[8]	[9]
0	OFF	A	Z	BASIC	←	L	I	P	nPr	2ndF
1	Q	S	X	TEXT	→	;	O	BS	→DEG	sin
2	W	D	C	CAPS	ANS	CONST	INS	π	√	cos
3	E	F	V	カナ	0	1	4	7	x²	ln
4	R	G	B	TAB	.	2	5	8	y^x^	log
5	T	H	N	SPACE	=	3	6	9	(	tan
6	Y	J	M	↓	+	-	*	/	1/x	F⇔E
7	U	K	,	↑	Enter	M+	R・CM	)	MDF	CLS

なので、OUT の後、値が正しく反映されるまで少し待つ (ウェイトを入れる) 必要があります。

PASTA/80 で PORT[] 配列を使ってキースキャンを行う分にはウェイトを入れる必要はないと思います。

See also:

SHARP PC-G850 解析資料 (akiyan.com)