<P>2. </FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN =
size=3D4>=BC=F5=B7=A8=D7=D3=B3=CC=D0=F2</FONT><FONT size=3D4>:=20
FSUB</P></FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN>
<P>=A2=D9=B9=A6=C4=DC=A3=BA</FONT>X<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A3=AD</FONT>Y<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=AD</FONT>&gt; Z</P>
<P><FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=B2=CE=CA=FD=B4=AB=B5=DD=B7=BD=B7=A8=A1=A2=CA=B9=D3=C3=B5=C4=
=B6=D1=D5=BB=BA=CD=CB=E3=B7=A8=A1=A2=D6=B4=D0=D0=CA=B1=BC=E4=CD=AC</FONT>=
FADD<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A1=A3</P>
<P>=A2=DA=B3=CC=D0=F2=A3=BA</P></FONT><FONT size=3D1>
<P>***************************************************</P>
<P>* FSUB: Subtraction X - Y -&gt; Z *</P>
<P>* Entry: X,Y in Stack *</P>
<P>* Exit: Z in Stack *</P>
<P>***************************************************</P>
<P>FSB5: LSL 10,SP</P>
<P>LSR 2,SP</P>
<P>ROR 10,SP</P>
<P>FSB3X: JMP FSB3</P>
<P>FSUB: AIS #-2</P>
<P>LDA 9,SP</P>
<P>LSL 10,SP</P>
<P>ROLA</P>
<P>SEC</P>
<P>ROR 10,SP ;Y=3D9,10,11</P>
<P>STA 2,SP ;Ym</P>
<P>LDA 5,SP</P>
<P>LSL 6,SP</P>
<P>ROLA</P>
<P>SEC</P>
<P>ROR 6,SP ;X=3D5,6,7</P>
<P>STA 1,SP ;Xm</P>
<P>CMP #0</P>
<P>BEQ FSB5</P>
<P>SUB 2,SP</P>
<P>BEQ FSB1</P>
<P>BCC FSB4</P>
<P>NEGA</P>
<P>CMP #24</P>
<P>BHS FSB5</P>
<P>LDX 2,SP</P>
<P>STX 1,SP</P>
<P>FSB0: LSR 6,SP</P>
<P>ROR 7,SP</P>
<P>ROR 8,SP</P>
<P>DBNZA FSB0</P>
<P>FSB1: LDA 5,SP</P>
<P>EOR 9,SP</P>
<P>BPL FSB6</P>
<P>LDA 8,SP</P>
<P>ADD 12,SP</P>
<P>STA 12,SP</P>
<P>LDA 7,SP</P>
<P>ADC 11,SP</P>
<P>STA 11,SP</P>
<P>LDA 6,SP</P>
<P>ADC 10,SP</P>
<P>BCC FSB2</P>
<P>INC 1,SP ;Over Flow</P>
<P>RORA</P>
<P>TAX</P>
<P>ROR 11,SP</P>
<P>ROR 12,SP</P>
<P>BCC FSB2</P>
<P>INC 12,SP</P>
<P>BNE FSB2</P>
<P>LDA 11,SP</P>
<P>ADC #0</P>
<P>STA 11,SP</P>
<P>TXA</P>
<P>ADC #0</P>
<P>FSB2: LSLA</P>
<P>STA 10,SP</P>
<P>LSL 5,SP; X Sign</P>
<P>LDA 1,SP</P>
<P>RORA</P>
<P>STA 9,SP</P>
<P>ROR 10,SP</P>
<P>FSB3: LDA 4,SP ;Move PC(in Stack)</P>
<P>STA 8,SP</P>
<P>LDA 3,SP</P>
<P>STA 7,SP</P>
<P>AIS #6</P>
<P>RTS</P>
<P>FSB4: TST 2,SP</P>
<P>BEQ FSB9</P>
<P>CMP #24</P>
<P>BHS FSB9</P>
<P>FSBA: LSR 10,SP</P>
<P>ROR 11,SP</P>
<P>ROR 12,SP</P>
<P>DBNZA FSBA</P>
<P>BRA FSB1</P>
<P>FSB6: LDA 8,SP</P>
<P>SUB 12,SP</P>
<P>STA 12,SP</P>
<P>LDA 7,SP</P>
<P>SBC 11,SP</P>
<P>STA 11,SP</P>
<P>LDA 6,SP</P>
<P>SBC 10,SP</P>
<P>BCC FSB8</P>
<P>NEG 12,SP ;UnderFlow</P>
<P>TAX</P>
<P>LDA 11,SP</P>
<P>SBC #0</P>
<P>STA 11,SP</P>
<P>TXA</P>
<P>SBC #0</P>
<P>COM 5,SP ;/X Sign</P>
<P>FSB8: BIT #$80</P>
<P>BNE FSB2</P>
<P>LSL 12,SP</P>
<P>ROL 11,SP</P>
<P>ROLA</P>
<P>TSTA</P>
<P>BNE FSBC</P>
<P>TST 11,SP</P>
<P>BNE FSBC</P>
<P>TST 12,SP</P>
<P>BEQ FSBD</P>
<P>FSBC: DEC 1,SP</P>
<P>BNE FSB8</P>
<P>FSBD: CLR 9,SP</P>
<P>CLR 10,SP</P>
<P>CLR 11,SP</P>
<P>CLR 12,SP</P>
<P>FSB3Y: JMP FSB3</P>
<P>FSB9: LDA 6,SP</P>
<P>LSLA</P>
<P>LSL 5,SP; X Sign</P>
<P>ROR 1,SP</P>
<P>RORA</P>
<P>STA 10,SP</P>
<P>LDA 1,SP</P>
<P>STA 9,SP</P>
<P>LDA 7,SP</P>
<P>STA 11,SP</P>
<P>LDA 8,SP</P>
<P>STA 12,SP</P>
<P>BRA FSB3Y</P></FONT><FONT size=3D4>
<P>3. </FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN =
size=3D4>=B3=CB=B7=A8=D7=D3=B3=CC=D0=F2=A3=BA</FONT><FONT=20
size=3D4>FMUL</P></FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN>
<P>=A2=D9=B9=A6=C4=DC=A3=BA</FONT>X<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A1=C1</FONT>Y<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=AD</FONT>&gt; Z</P>
<P><FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=B2=CE=CA=FD=B4=AB=B5=DD=B7=BD=B7=A8=CD=AC</FONT>FADD<FONT =
face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A1=A3=CB=FC=D0=E8=CA=B9=D3=C3</FONT>12<FONT =
face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D7=D6=BD=DA=B6=D1=D5=BB=C7=F8=A3=A8=BA=AC</FONT>8<FONT =
face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=D7=D6=BD=DA=B5=C4</FONT>X<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A1=A2</FONT>Y<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=AC</FONT>2<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D7=D6=BD=DA=B5=F7=D3=C3=D6=B8=C1=EE=B5=C4=B7=B5=BB=D8=B5=D8=
=D6=B7=A3=A9=A1=A3</P>
<P>=D6=B4=D0=D0=CA=B1=BC=E4=D4=BC</FONT>50<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A6=CC</FONT>s<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A1=A3</P>
<P>=A2=DA=CB=E3=B7=A8=A3=BA</P>
<P></FONT>1) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D6=B4=D0=D0=CE=B2=CA=FD=B3=CB=B7=A8=A3=AC=CA=B9=D3=C3</FONT=
>M68HC08<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=B5=C4</FONT>MUL<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D6=B8=C1=EE=CA=B5=CF=D6=A1=A3</P>
<P></FONT>2) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=BD=D7=C2=EB=CF=E0=BC=D3=A1=A3</P>
<P></FONT>3) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=BD=E1=B9=FB=B9=E6=B8=F1=BB=AF=A1=A3</P>
<P>=A2=DB=B3=CC=D0=F2=A3=BA</P></FONT><FONT size=3D1>
<P>***************************************************</P>
<P>* FMUL: Multiply X * Y -&gt; Z *</P>
<P>* Entry: X,Y in Stack *</P>
<P>* Exit: Z in Stack *</P>
<P>***************************************************</P>
<P>FML0: CLR 8,SP</P>
<P>CLR 9,SP</P>
<P>CLR 10,SP</P>
<P>CLR 11,SP</P>
<P>JMP FML1</P>
<P>FMUL: AIS #-1</P>
<P>LDA 8,SP</P>
<P>EOR 4,SP</P>
<P>TAX</P>
<P>LDA 8,SP</P>
<P>LSL 9,SP</P>
<P>ROLA</P>
<P>BEQ FML0</P>
<P>SEC</P>
<P>STA 1,SP</P>
<P>ROR 9,SP</P>
<P>LDA 4,SP</P>
<P>LSL 5,SP</P>
<P>ROLA</P>
<P>BEQ FML0</P>
<P>SEC</P>
<P>ROR 5,SP</P>
<P>ADD 1,SP</P>
<P>SUB #$7E ;-126</P>
<P>STA 8,SP</P>
<P>STX 1,SP ;Sign</P>
<P>LDA 11,SP</P>
<P>LDX 6,SP</P>
<P>MUL</P>
<P>STX 4,SP</P>
<P>LDA 11,SP</P>
<P>LDX 5,SP</P>
<P>MUL</P>
<P>ADD 4,SP</P>
<P>STA 4,SP</P>
<P>TXA</P>
<P>ADC #0</P>
<P>STA 11,SP</P>
<P>LDA 10,SP</P>
<P>LDX 7,SP</P>
<P>MUL</P>
<P>TXA</P>
<P>ADD 4,SP</P>
<P>STA 4,SP</P>
<P>CLRA</P>
<P>ADC 11,SP</P>
<P>STA 11,SP</P>
<P>LDA 10,SP</P>
<P>LDX 6,SP</P>
<P>MUL</P>
<P>ADD 4,SP</P>
<P>STA 4,SP</P>
<P>TXA</P>
<P>ADC 11,SP</P>
<P>STA 11,SP</P>
<P>CLRA</P>
<P>ADC #0</P>
<P>PSHA</P>
<P>LDA 10,SP</P>
<P>LDX 8,SP</P>
<P>MUL</P>
<P>ADD 5,SP</P>
<P>STA 5,SP</P>
<P>TXA</P>
<P>ADC 12,SP</P>
<P>STA 12,SP</P>
<P>PULA</P>
<P>ADC #0</P>
<P>STA 7,SP</P>
<P>LDA 10,SP</P>
<P>LDX 5,SP</P>
<P>MUL</P>
<P>ADD 11,SP</P>
<P>STA 11,SP</P>
<P>TXA</P>
<P>ADC 7,SP</P>
<P>STA 10,SP</P>
<P>CLRA</P>
<P>ADC #0</P>
<P>STA 7,SP</P>
<P>LDA 9,SP</P>
<P>LDX 6,SP</P>
<P>MUL</P>
<P>ADD 11,SP</P>
<P>STA 11,SP</P>
<P>TXA</P>
<P>ADC 10,SP</P>
<P>STA 10,SP</P>
<P>CLRA</P>
<P>ADC 7,SP</P>
<P>STA 4,SP</P>
<P>LDA 9,SP</P>
<P>LDX 5,SP</P>
<P>MUL</P>
<P>ADD 10,SP</P>
<P>STA 10,SP</P>
<P>TXA</P>
<P>ADC 4,SP</P>
<P>FML2: BIT #$80</P>
<P>BNE FML3</P>
<P>LSL 11,SP</P>
<P>ROL 10,SP</P>
<P>ROLA</P>
<P>DEC 8,SP</P>
<P>BNE FML2</P>
<P>FML3: LSLA</P>
<P>LSL 1,SP ;Sign</P>
<P>ROR 8,SP</P>
<P>RORA</P>
<P>STA 9,SP</P>
<P>FML1: LDA 2,SP</P>
<P>STA 6,SP</P>
<P>LDA 3,SP</P>
<P>STA 7,SP</P>
<P>AIS #5</P>
<P>RTS</P></FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN size=3D4>
<P>=A1=A1</P></FONT><FONT size=3D4>
<P>4. </FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN =
size=3D4>=B3=FD=B7=A8=D7=D3=B3=CC=D0=F2=A3=BA</FONT><FONT=20
size=3D4>FDIV</P></FONT><FONT face=3D=CB=CE=CC=E5 lang=3DZH-CN>
<P>=A2=D9=B9=A6=C4=DC=A3=BA</FONT>X<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A1=C2</FONT>Y<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=AD</FONT>&gt; Z</P>
<P><FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=B2=CE=CA=FD=B4=AB=B5=DD=B7=BD=B7=A8=CD=AC</FONT>FADD<FONT =
face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A1=A3=CB=FC=D0=E8=CA=B9=D3=C3</FONT>13<FONT =
face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D7=D6=BD=DA=B6=D1=D5=BB=C7=F8=A3=A8=BA=AC</FONT>8<FONT =
face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=D7=D6=BD=DA=B5=C4</FONT>X<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A1=A2</FONT>Y<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=AC</FONT>2<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=D7=D6=BD=DA=B5=F7=D3=C3=D6=B8=C1=EE=B5=C4=B7=B5=BB=D8=B5=D8=
=D6=B7=A3=A9=A1=A3</P>
<P>=D6=B4=D0=D0=CA=B1=BC=E4=D4=BC</FONT>230<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A6=CC</FONT>s<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A1=A3</P>
<P>=A2=DA=CB=E3=B7=A8=A3=BA</P>
<P></FONT>1) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=C5=D0=B6=CF=B3=FD=CA=FD=CA=C7=B7=F1=B5=C8=D3=DA=C1=E3=A3=AC=
=B5=C8=D3=DA=D4=F2=B3=F6=B4=ED=A3=A8</FONT>C<FONT face=3D=CB=CE=CC=E5=20
lang=3DZH-CN>=A3=BD</FONT>1<FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=A3=A9=A1=A3</P>
<P></FONT>2) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=B1=C8=BD=CF=B1=BB=B3=FD=CA=FD=D3=EB=B3=FD=CA=FD=B5=C4=CE=B2=
=CA=FD=A3=AC=C8=E7=B4=F3=D3=DA=B5=C8=D3=DA=D4=F2=D7=F3=D2=C6=B1=BB=B3=FD=CA=
=FD=CE=B2=CA=FD=A3=A8=BD=D7=BC=D3</FONT>1<FONT=20
face=3D=CB=CE=CC=E5 lang=3DZH-CN>=A3=A9=A1=A3</P>
<P></FONT>3) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=BD=D7=C2=EB=CF=E0=BC=F5=A1=A3</P>
<P></FONT>4) <FONT face=3D=CB=CE=CC=E5 =
lang=3DZH-CN>=CE=B2=CA=FD=CF=E0=B3=FD=A3=A8=B2=C9=D3=C3=B1=C8=BD=CF=B3=FD=
=B7=A8=A3=A9=A1=A3</P>
<P>=A2=DB=B3=CC=D0=F2</FONT>:</P><FONT size=3D1>
<P>***************************************************</P>
<P>* FDIV: Division X / Y -&gt; Z *</P>
<P>* Entry: X,Y in Stack *</P>
<P>* Exit: Z in Stack *</P>
<P>***************************************************</P>
<P>FDV1: CLR 13,SP</P>
<P>CLR 12,SP</P>
<P>CLR 11,SP</P>
<P>CLR 10,SP</P>
<P>CLC</P>
<P>FDV8: JMP FDV7</P>
<P>FDV0: LDA #$FF</P>
<P>STA 13,SP</P>
<P>STA 12,SP</P>
<P>STA 11,SP</P>
<P>STA 10,SP</P>
<P>SEC</P>
<P>BRA FDV8</P>
<P>FDIV: AIS #-3</P>
<P>LDA 10,SP</P>
<P>EOR 6,SP</P>
<P>TAX</P>
<P>LDA 10,SP</P>
<P>LSL 11,SP</P>
<P>ROLA</P>
<P>BEQ FDV1</P>
<P>SEC</P>
<P>ROR 11,SP</P>
<P>STA 1,SP</P>
<P>LDA 6,SP</P>
<P>LSL 7,SP</P>
<P>ROLA</P>
<P>BEQ FDV0</P>
<P>SEC</P>
<P>ROR 7,SP</P>
<P>SUB 1,SP</P>
<P>ADD #$7E ;+126</P>
<P>STA 10,SP</P>
<P>STX 6,SP ;Sign</P>
<P>CLR 3,SP</P>
<P>CLR 2,SP</P>
<P>CLR 1,SP</P>
<P>LDA 9,SP</P>
<P>SUB 13,SP</P>
<P>LDA 8,SP</P>
<P>SBC 12,SP</P>
<P>LDA 7,SP</P>
<P>SBC 11,SP</P>
<P>BCS FDV2</P>
<P>LSR 7,SP</P>
<P>ROR 8,SP</P>
<P>ROR 9,SP</P>
<P>ROR 3,SP</P>
<P>INC 10,SP</P>
<P>FDV2: LDX #24</P>
<P>FDV3: LSL 1,SP</P>
<P>ROL 2,SP</P>
<P>ROL 3,SP</P>
<P>ROL 9,SP</P>
<P>ROL 8,SP</P>
<P>ROL 7,SP</P>
<P>BCS FDV4</P>
<P>LDA 9,SP</P>
<P>SUB 13,SP</P>
<P>LDA 8,SP</P>
<P>SBC 12,SP</P>