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debug.pas
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debug.pas
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unit Debug;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ExtCtrls, Buttons;
type
TDebugForm = class(TForm)
ListGroupBox: TGroupBox;
ListPaintBox: TPaintBox;
ListScrollBar: TScrollBar;
ListEdit: TEdit;
RegGroupBox: TGroupBox;
RegPaintBox: TPaintBox;
RegScrollBar: TScrollBar;
RegEdit: TEdit;
MainGroupBox: TGroupBox;
MainPaintBox: TPaintBox;
MainScrollBar: TScrollBar;
MainEdit: TEdit;
BinGroupBox: TGroupBox;
BinPaintBox: TPaintBox;
BinScrollBar: TScrollBar;
BinEdit: TEdit;
StepGroupBox: TGroupBox;
StepButton: TButton;
TraceGroupBox: TGroupBox;
TraceEdit: TEdit;
TraceButton: TButton;
BpGroupBox: TGroupBox;
BpEdit: TEdit;
BpButton: TButton;
{ DISASSEMBLY BOX EVENTS }
procedure ListBoxScroll(Sender: TObject;
ScrollCode: TScrollCode; var ScrollPos: Integer);
procedure ListGroupBoxClick(Sender: TObject);
procedure ListPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure ListEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procedure ListEditChange(Sender: TObject);
procedure ListPaintBoxPaint(Sender: TObject);
{ REGISTER BOX EVENTS }
procedure RegBoxScroll(Sender: TObject; ScrollCode: TScrollCode;
var ScrollPos: Integer);
procedure RegGroupBoxClick(Sender: TObject);
procedure RegPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure RegEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procedure RegEditChange(Sender: TObject);
procedure RegPaintBoxPaint(Sender: TObject);
{ MAIN REGISTER BOX EVENTS }
procedure MainBoxScroll(Sender: TObject; ScrollCode: TScrollCode;
var ScrollPos: Integer);
procedure MainGroupBoxClick(Sender: TObject);
procedure MainPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure MainEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procedure MainEditChange(Sender: TObject);
procedure MainPaintBoxPaint(Sender: TObject);
{ BINARY EDITOR BOX EVENTS }
procedure BinBoxScroll(Sender: TObject; ScrollCode: TScrollCode;
var ScrollPos: Integer);
procedure BinGroupBoxClick(Sender: TObject);
procedure BinPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure BinEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procedure BinEditChange(Sender: TObject);
procedure BinPaintBoxPaint(Sender: TObject);
{ GENERAL FORM EVENTS }
procedure DebugCreate(Sender: TObject);
procedure DebugShow(Sender: TObject);
procedure DebugHide(Sender: TObject);
{ MACHINE CODE EXECUTION CONTROL EVENTS }
procedure StepGroupBoxClick(Sender: TObject);
procedure StepButtonClick(Sender: TObject);
procedure TraceGroupBoxClick(Sender: TObject);
procedure TraceButtonClick(Sender: TObject);
procedure TraceEditChange(Sender: TObject);
procedure BpGroupBoxClick(Sender: TObject);
procedure BpButtonClick(Sender: TObject);
procedure BpEditChange(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
DebugForm: TDebugForm;
implementation
{$R *.dfm}
uses
Def, Dis, Asem, Cpu;
const
SELECTED = clBlue;
var
ListAddr: integer;
ListMem: integer; {selected memory}
RegAddr: integer;
MainAddr: integer;
BinAddr: integer;
BinMem: integer; {selected memory}
EditState: (NoEditSt, ListAddrEditSt, ListInstrEditSt, RegEditSt,
FlagEditSt, MainEditSt, BinAddrEditSt, BinDataEditSt,
BinCharEditSt);
EditAddr: integer; {address of edited object - memory location, register}
{ set the font color of all TGrupBox controls to default }
procedure Unselect;
begin
with DebugForm do
begin
ListGroupBox.Font.Color := clWindowText;
RegGroupBox.Font.Color := clWindowText;
MainGroupBox.Font.Color := clWindowText;
BinGroupBox.Font.Color := clWindowText;
StepGroupBox.Font.Color := clWindowText;
TraceGroupBox.Font.Color := clWindowText;
BpGroupBox.Font.Color := clWindowText;
end {with};
end {Unselect};
procedure BoxEdit (box: TPaintBox; ed: TEdit; Col, Row, W: integer);
var
cx, cy, L, T: integer;
begin
with box do
begin
cx := Canvas.TextWidth('0');
cy := Canvas.TextHeight('0');
L := Left;
T := Top;
end {with};
with ed do
begin
Left := L + Col * cx;
Top := T + Row * cy;
Width := cx * W;
Height := cy;
MaxLength := W;
Text := '';
end {with};
end {BoxEdit};
{ value of a hex digit }
function GetDigit (c: char) : integer;
const
digits: string[22] = '0123456789ABCDEFabcdef';
var
i: integer;
begin
i := 1;
while (i<=22) and (c <> digits[i]) do Inc (i);
if i>16 then GetDigit := i-7 else GetDigit := i-1;
end {GetDigit};
{ remove digits out of specified range from the edited string }
procedure CheckEdit (ed: TEdit; limit: integer);
var
i, x, y: integer;
s: string;
begin
with ed do
begin
if Modified then
begin
s := Text;
x := SelStart;
y := SelLength;
i := 1;
while i <= Length(s) do
begin
if GetDigit(s[i]) >= limit then
begin
Delete (s, i, 1);
if x >= i then Dec(x) else if x+y >= i then Dec(y);
end
else
begin
Inc (i);
end {if};
end {while};
Text := s;
SelStart := x;
SelLength := y;
end {if};
end {with};
end {CheckEdit};
procedure CloseEdit;
begin
EditState := NoEditSt;
with DebugForm do
begin
with ListEdit do
begin
Text := '';
Width := 0;
Left := 0;
Top := 0;
end {with};
with RegEdit do
begin
Text := '';
Width := 0;
Left := 0;
Top := 0;
end {with};
with MainEdit do
begin
Text := '';
Width := 0;
Left := 0;
Top := 0;
end {with};
with BinEdit do
begin
Text := '';
Width := 0;
Left := 0;
Top := 0;
end {with};
ListPaintBox.Invalidate;
RegPaintBox.Invalidate;
MainPaintBox.Invalidate;
BinPaintBox.Invalidate;
end {with};
end {CloseEdit};
{ scrolling with the arrow keys,
returns new value for Position or -1 when Position hasn't changed }
function ArrowKeys (Key: word; sb: TScrollBar) : integer;
begin
with sb do
begin
Result := Position;
case Key of
VK_HOME: Result := Min;
VK_PRIOR: Dec (Result, LargeChange);
VK_UP: Dec (Result, SmallChange);
VK_DOWN: Inc (Result, SmallChange);
VK_NEXT: Inc (Result, LargeChange);
VK_END: Result := Max;
end {case};
if Result < Min then Result := Min
else if Result > Max then Result := Max;
if Result = Position then Result := -1;
end {with};
end;
{ DISASSEMBLY BOX EVENTS }
{ expects the new disassembly address, sets new values of ListAddr, ListMem }
procedure SetListMem (a18: integer);
begin
ListMem := FindMem (a18);
ListAddr := a18;
if ListMem < 0 then
{ out of allowed address space, select ROM0 }
begin
ListMem := ROM0;
ListAddr := FirstAddr (ListMem);
end {if};
end {SetListMem};
procedure TDebugForm.ListGroupBoxClick(Sender: TObject);
begin
ListEdit.SetFocus;
Unselect;
ListGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.ListBoxScroll(Sender: TObject;
ScrollCode: TScrollCode; var ScrollPos: Integer);
begin
ListAddr := ScrollPos + FirstAddr (ListMem);
ListEdit.SetFocus;
Unselect;
ListGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.ListPaintBoxMouseDown(Sender: TObject;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
Col, Row, cols, rows, i, w: integer;
savepc, saveua, savedel: word;
cx, cy: integer; { font size in pixels }
begin
ListEdit.SetFocus;
Unselect;
ListGroupBox.Font.Color := SELECTED;
CloseEdit;
EditAddr := ListAddr;
with ListPaintBox do
begin
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
cols := Width div cx;
rows := Height div cy;
Col := X div cx;
Row := Y div cy;
end {with};
if Row >= rows then Exit;
if (Col < 5) and (Row = 0) then
begin
EditState := ListAddrEditSt;
Col := 0;
w := 5;
ListEdit.CharCase := ecUpperCase;
end
else if (Col >= 7) and (Col < cols) then
begin
EditState := ListInstrEditSt;
savepc := pc;
saveua := ua;
savedel := delayed_ua;
ua := word(ListAddr shr 16);
delayed_ua := ua;
i := 0;
while i < Row do
begin
if (EditAddr >= LastAddr (ListMem)) or
(EditAddr < FirstAddr (ListMem)) { when pc wraps around }
then break;
pc := word(EditAddr);
{ move the 'pc' to the next instruction, i.e. disassemble a single
instruction without generating any output }
Arguments (ScanMnemTab);
EditAddr := Addr18 (ListAddr shr 16, pc);
Inc (i);
end {while};
pc := savepc;
ua := saveua;
delayed_ua := savedel;
if i < Row then Exit;
Col := 7;
w := cols - 7;
ListEdit.CharCase := ecNormal;
end
else
begin
Exit;
end {if};
BoxEdit (ListPaintBox, ListEdit, Col, Row, w);
end;
procedure TDebugForm.ListEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
var
i, a, valcode: integer;
savepc, saveua, savedel: word;
begin
i := ArrowKeys (Key, ListScrollBar);
if (i >= 0) and (EditState = NoEditSt) then
begin
ListAddr := i + FirstAddr (ListMem);
ListPaintBox.Invalidate;
end
else if Key = VK_RETURN then
begin
if EditState = ListAddrEditSt then
begin
Val ('$0'+Trim(ListEdit.Text), a, valcode);
SetListMem (a);
CloseEdit;
end
else if EditState = ListInstrEditSt then
begin
{ determine the memory access mode in the 'opforg' variable }
savepc := pc;
saveua := ua;
savedel := delayed_ua;
pc := word(ListAddr);
ua := word(ListAddr shr 16);
delayed_ua := ua;
FetchOpcode;
pc := savepc;
ua := saveua;
delayed_ua := savedel;
{ assemble the instruction }
loc := word(EditAddr);
wmd := opforg;
InBuf := ListEdit.Text;
Assemble;
{ when succeeded, copy the assembler output to the memory }
if InIndex = 0 then
begin
i := 0;
while i < OutIndex do
begin
if opforg = 0 then
begin
ptrb(SrcPtr(EditAddr + i))^ := OutBuf[i];
Inc (i);
end
else
begin
ptrw(SrcPtr(EditAddr + i div 2))^ := ptrw(@OutBuf[i])^;
Inc (i,2);
end {if};
end {while};
dummysrc[0] := $FF;
dummysrc[1] := $FF;
CloseEdit;
end
{ when failed, position the cursor just before the first offending character }
else
begin
ListEdit.SelStart := InIndex-1;
end {if};
end {if};
end
else if key = VK_ESCAPE then CloseEdit;
end;
procedure TDebugForm.ListEditChange(Sender: TObject);
begin
if EditState = ListAddrEditSt then CheckEdit (ListEdit, 16);
end;
procedure TDebugForm.ListPaintBoxPaint(Sender: TObject);
var
i, rows: integer;
a: integer;
savepc, saveua, savedel, index: word;
cx, cy: integer; { font size in pixels }
begin
savepc := pc;
saveua := ua;
savedel := delayed_ua;
a := ListAddr;
ua := word(ListAddr shr 16);
delayed_ua := ua;
with ListPaintBox do
begin
Canvas.Brush.Style := bsSolid;
Canvas.Brush.Color := Color;
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
end {with};
with ListPaintBox.Canvas do
begin
for i := 0 to rows-1 do
begin
if (a >= LastAddr (ListMem)) or
(a < FirstAddr (ListMem)) { when pc wraps around }
then break;
TextOut (0, i*cy, IntToHex(a, 5) + ':');
pc := word(a);
index := ScanMnemTab;
TextOut (7*cx, i*cy, Mnemonic (index));
TextOut (13*cx, i*cy, Arguments (index));
a := Addr18 (ListAddr shr 16, pc);
end {for};
end {with};
pc := savepc;
ua := saveua;
delayed_ua := savedel;
{ set the scroll bar }
with ListScrollBar do
begin
SetParams (ListAddr - FirstAddr (ListMem), 0, LastAddr (ListMem) -
FirstAddr (ListMem) - rows);
if (a < LastAddr (ListMem)) and
(a >= FirstAddr (ListMem)) { when pc wraps around }
then LargeChange := a - ListAddr;
end {with};
end;
{ REGISTER BOX EVENTS }
type
reg_properties = record
name: string[3];
ptr: pointer;
size: integer;
mask: word;
end;
flag_properties = record
name: array[0..1] of string[3];
column: integer;
mask: byte;
end;
const
REGROWS = 13;
regset: array[0..REGROWS-1] of reg_properties = (
( name: 'PC:'; ptr: @pc; size: 4; mask: $FFFF; ),
( name: 'SS:'; ptr: @ss; size: 4; mask: $FFFF; ),
( name: 'US:'; ptr: @us; size: 4; mask: $FFFF; ),
( name: 'IX:'; ptr: @ix; size: 4; mask: $FFFF; ),
( name: 'IY:'; ptr: @iy; size: 4; mask: $FFFF; ),
( name: 'IZ:'; ptr: @iz; size: 4; mask: $FFFF; ),
( name: 'SX:'; ptr: @sx; size: 2; mask: $001F; ),
( name: 'SY:'; ptr: @sy; size: 2; mask: $001F; ),
( name: 'SZ:'; ptr: @sz; size: 2; mask: $001F; ),
( name: 'UA:'; ptr: @ua; size: 2; mask: $00FF; ),
( name: 'IA:'; ptr: @ia; size: 2; mask: $00FF; ),
( name: 'IB:'; ptr: @ib; size: 2; mask: $00FF; ),
( name: 'IE:'; ptr: @ie; size: 2; mask: $00FF; )
);
flagset: array[0..3] of flag_properties = (
( name: ('Z ', 'NZ'); column: 2; mask: Z_bit; ),
( name: ('NC', 'C '); column: 4; mask: C_bit; ),
( name: ('LZ ', 'NLZ'); column: 6; mask: LZ_bit; ),
( name: ('UZ ', 'NUZ'); column: 9; mask: UZ_bit; )
);
procedure TDebugForm.RegGroupBoxClick(Sender: TObject);
begin
RegEdit.SetFocus;
Unselect;
RegGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.RegBoxScroll(Sender: TObject; ScrollCode: TScrollCode;
var ScrollPos: Integer);
begin
RegAddr := ScrollPos;
RegEdit.SetFocus;
Unselect;
RegGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.RegPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
Col, Row, rows, w: integer;
cx, cy: integer; { font size in pixels }
begin
RegEdit.SetFocus;
Unselect;
RegGroupBox.Font.Color := SELECTED;
CloseEdit;
with RegPaintBox do
begin
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
Col := X div cx;
Row := Y div cy;
end {with};
if rows > REGROWS+1 then rows := REGROWS+1;
if (Row > 0) and (Row < rows) and (Col >= 4) then
{ registers other than Flags }
begin
EditAddr := Row + RegAddr - 1;
w := regset[EditAddr].size;
if Col >= 4+w then Exit;
EditState := RegEditSt;
BoxEdit (RegPaintBox, RegEdit, 4, Row, w);
end
else if (Row = 0) and (Col >= 2) and (Col < 12) then
{ Flags register }
begin
EditState := FlagEditSt;
EditAddr := 0;
while (EditAddr < 3) and (Col >= flagset[EditAddr+1].column) do
Inc (EditAddr);
flag := flag xor flagset[EditAddr].mask;
RegPaintBox.Invalidate;
end {if};
end;
procedure TDebugForm.RegEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
var
i, x, valcode: integer;
begin
i := ArrowKeys (Key, RegScrollBar);
if (i >= 0) and (EditState = NoEditSt) then
begin
RegAddr := i;
RegPaintBox.Invalidate;
end
else if Key = VK_RETURN then
begin
if EditState = RegEditSt then
begin
Val ('$0'+Trim(RegEdit.Text), x, valcode);
with regset[EditAddr] do
begin
x := x and integer(mask);
if size > 2 then ptrw(ptr)^ := word(x) else ptrb(ptr)^ := byte(x);
if ptr = @ua then delayed_ua := ua;
end {with};
CloseEdit;
end {if};
end
else if Key = VK_ESCAPE then CloseEdit;
end;
procedure TDebugForm.RegEditChange(Sender: TObject);
begin
CheckEdit (RegEdit, 16);
end;
procedure TDebugForm.RegPaintBoxPaint(Sender: TObject);
var
i, rows: integer;
x: word;
cx, cy: integer; { font size in pixels }
begin
with RegPaintBox do
begin
Canvas.Brush.Style := bsSolid;
Canvas.Brush.Color := Color;
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
end {with};
if rows > REGROWS+1 then rows := REGROWS+1;
with RegPaintBox.Canvas do
begin
{ scrollable registers }
for i := 0 to rows-2 do
begin
with regset[i+RegAddr] do
begin
TextOut (0, (i+1)*cy, name);
if size > 2 then x := ptrw(ptr)^ else x := word(ptrb(ptr)^);
TextOut (4*cx, (i+1)*cy, IntToHex(x and mask, size));
end {with};
end {for};
{ unscrollable Flags register }
TextOut (0, 0, 'F:');
for i := 0 to 3 do
begin
if Odd (i) then Brush.Color := clLtGray else Brush.Color := clWhite;
with flagset[i] do
begin
if (flag and mask) = 0 then x := 0 else x := 1;
TextOut (column*cx, 0, name[x]);
end {with};
end {for};
end {with};
{ set the scroll bar }
with RegScrollBar do
begin
SetParams (RegAddr, 0, REGROWS+1-rows);
LargeChange := rows-1;
end {with};
end;
{ MAIN REGISTER BOX EVENTS }
const
MAINROWS = 2;
mrnames: array[0..MAINROWS-1] of string[9] = ('$00..$15:', '$16..$31:');
procedure TDebugForm.MainGroupBoxClick(Sender: TObject);
begin
MainEdit.SetFocus;
Unselect;
MainGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.MainBoxScroll(Sender: TObject;
ScrollCode: TScrollCode; var ScrollPos: Integer);
begin
MainAddr := ScrollPos*16;
MainEdit.SetFocus;
Unselect;
MainGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.MainPaintBoxMouseDown(Sender: TObject;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
Col, Row, rows: integer;
cx, cy: integer; { font size in pixels }
begin
MainEdit.SetFocus;
Unselect;
MainGroupBox.Font.Color := SELECTED;
CloseEdit;
with MainPaintBox do
begin
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
Col := X div cx;
Row := Y div cy;
end {with};
Dec (Col, 10);
if (Row >= 0) and (Row < rows) and (Col >= 0) and (Col < 51) and
((Col mod 13) < 11) and (((Col mod 13) mod 3) < 2) then
begin
EditState := MainEditSt;
Col := (Col - Col div 13) div 3;
EditAddr := MainAddr + 16*Row + Col;
Col := 3*Col + Col div 4 + 10;
BoxEdit (MainPaintBox, MainEdit, Col, Row, 2);
end {if};
end;
procedure TDebugForm.MainEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
var
i, x, valcode: integer;
begin
i := ArrowKeys (Key, MainScrollBar);
if (i >= 0) and (EditState = NoEditSt) then
begin
MainAddr := 16*i;
MainPaintBox.Invalidate;
end
else if Key = VK_RETURN then
begin
if EditState = MainEditSt then
begin
Val ('$0'+Trim(MainEdit.Text), x, valcode);
mr[EditAddr] := byte(x);
CloseEdit;
end {if};
end
else if Key = VK_ESCAPE then CloseEdit;
end;
procedure TDebugForm.MainEditChange(Sender: TObject);
begin
CheckEdit (MainEdit, 16);
end;
procedure TDebugForm.MainPaintBoxPaint(Sender: TObject);
var
i, j, rows, Col: integer;
cx, cy: integer; { font size in pixels }
begin
with MainPaintBox do
begin
Canvas.Brush.Style := bsSolid;
Canvas.Brush.Color := Color;
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
end {with};
if rows > MAINROWS then rows := MAINROWS;
with MainPaintBox.Canvas do
begin
for j := 0 to rows-1 do
begin
TextOut (0, j*cy, mrnames[MainAddr div 16 + j]);
for i := 0 to 15 do
begin
Col := 3*i + i div 4 + 10;
TextOut (Col*cx, j*cy, IntToHex(mr[MainAddr+16*j+i], 2));
end {for i};
end {for j};
end {with};
{ set the scroll bar }
with MainScrollBar do
begin
SetParams (MainAddr div 16, 0, MAINROWS-rows);
LargeChange := rows;
end {with};
end;
{ BINARY EDITOR BOX EVENTS }
{ expects the memory address, sets new values of BinAddr, BinMem }
procedure SetBinMem (a18: integer);
begin
BinMem := FindMem (a18);
BinAddr := a18 and $3FFF0;
if (BinMem < 0) or not memdef[BinMem].writable then
{ out of allowed address space, select RAM0 }
begin
BinMem := RAM0;
BinAddr := FirstAddr (BinMem);
end {if};
end {SetBinMem};
procedure TDebugForm.BinGroupBoxClick(Sender: TObject);
begin
BinEdit.SetFocus;
Unselect;
BinGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.BinBoxScroll(Sender: TObject;
ScrollCode: TScrollCode; var ScrollPos: Integer);
begin
BinAddr := ScrollPos*16 + FirstAddr (BinMem);
BinEdit.SetFocus;
Unselect;
BinGroupBox.Font.Color := SELECTED;
CloseEdit;
end;
procedure TDebugForm.BinPaintBoxMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
Col, Row, rows, w: integer;
cx, cy: integer; { font size in pixels }
begin
BinEdit.SetFocus;
Unselect;
BinGroupBox.Font.Color := SELECTED;
CloseEdit;
with BinPaintBox do
begin
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
Col := X div cx;
Row := Y div cy;
end {with};
if Row >= rows then Exit;
if (Row = 0) and (Col < 5) then
begin {select BinAddr edition}
EditState := BinAddrEditSt;
EditAddr := 0;
Col := 0;
w := 5;
BinEdit.CharCase := ecUpperCase;
end
else if (Col >= 7) and (Col < 55) and (((Col-7) mod 3) < 2) then
begin {select byte edition in the BinBox}
Col := (Col-7) div 3;
EditAddr := BinAddr + 16*Row + Col;
if EditAddr >= LastAddr (BinMem) then Exit;
Col := Col*3 + 7;
EditState := BinDataEditSt;
w := 2;
BinEdit.CharCase := ecUpperCase;
end
else if (Col >= 55) and (Col < 71) then
begin {select character edition in the BinBox}
EditAddr := BinAddr + 16*Row + Col - 55;
if EditAddr >= LastAddr (BinMem) then Exit;
EditState := BinCharEditSt;
w := 1;
BinEdit.CharCase := ecNormal;
end
else
begin
Exit;
end {if};
BoxEdit (BinPaintBox, BinEdit, Col, Row, w);
end;
procedure TDebugForm.BinEditKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
var
i, x, valcode: integer;
begin
i := ArrowKeys (Key, BinScrollBar);
if (i >= 0) and (EditState = NoEditSt) then
begin
BinAddr := 16*i + FirstAddr (BinMem);
BinPaintBox.Invalidate;
end
else if Key = VK_RETURN then
begin
if EditState = BinAddrEditSt then
begin
Val('$0'+Trim(BinEdit.Text), x, valcode);
SetBinMem (x);
CloseEdit;
end
else if EditState = BinDataEditSt then
begin
Val ('$0'+Trim(BinEdit.Text), x, valcode);
DstPtr(EditAddr)^ := byte(x);
CloseEdit;
end
else if EditState = BinCharEditSt then
begin
DstPtr(EditAddr)^ := byte(Ord(BinEdit.Text[1]));
CloseEdit;
end {if};
end
else if Key = VK_ESCAPE then CloseEdit;
end;
procedure TDebugForm.BinEditChange(Sender: TObject);
begin
if (EditState = BinAddrEditSt) or (EditState = BinDataEditSt) then
CheckEdit (BinEdit, 16);
end;
procedure TDebugForm.BinPaintBoxPaint(Sender: TObject);
var
i, j, rows: integer;
a: integer;
x: byte;
cx, cy: integer; { font size in pixels }
begin
a := BinAddr;
with BinPaintBox do
begin
Canvas.Brush.Style := bsSolid;
Canvas.Brush.Color := Color;
cx := Canvas.TextWidth ('0');
cy := Canvas.TextHeight ('0');
rows := Height div cy;
end {with};
with BinPaintBox.Canvas do
begin
for i := 0 to rows-1 do
begin
if a >= LastAddr (BinMem) then break;
{ address }
TextOut (0, i*cy, IntToHex(a, 5) + ':');
{ bytes }
for j := 0 to 15 do
begin
TextOut ((7+3*j)*cx, i*cy, IntToHex(SrcPtr(a+j)^, 2));
end {for};
{ characters }
for j := 0 to 15 do
begin
x := SrcPtr(a+j)^;
if (x < $20) or (x > $7E) then x := byte(Ord('.'));
TextOut ((55+j)*cx, i*cy, Chr(x));