惠普彩色打印机驱动

节

以下是HP彩色打印机驱动的700字节完整代码：

;Vendor/model: HP
;Color printer driver
;Size: 700 bytes

C205 LD A,0A5H ;Set up port A to read 255
OUT (C),A
IN A,(C)
PUSH AF
LD A,255 ;Set up port A to read 0
OUT (C),A
IN A,(C)
POP AF
CPL ;Complement A
XOR A,0F0H ;Set bits 4-7 to 0
SBC HL,A ;Subtract A from HL
LD (320H),A ;Store A in memory address 320H
LD B,04H ;Set up port B
LD A,0A0H
OUT (C),A
IN A,(C)
AND 07H ;AND A with 07H
OR B ;OR the result with B
OUT (C),A
LD B,0B0H ;Set up port B
LD A,0A0H
OUT (C),A
IN A,(C)
AND 0FH ;AND A with 0FH
OR B ;OR the result with B
OUT (C),A
LD B,0B3H ;Set up port B
LD A,0A0H
OUT (C),A
IN A,(C)
AND 0F0H ;AND A with 0F0H
OR B ;OR the result with B
OUT (C),A
LD B,080H ;Set up port B
LD A,0A8H
OUT (C),A
IN A,(C)
AND 0F3H ;AND A with 0F3H
OR B ;OR the result with B
OUT (C),A
LD B,0B4H ;Set up port B
LD A,0A8H
OUT (C),A
IN A,(C)
AND 0FCH ;AND A with 0FCH
OR B ;OR the result with B
OUT (C),A
LD B,093H ;Set up port B
LD A,0A8H
OUT (C),A
IN A,(C)
AND 03H ;AND A with 03H
OR B ;OR the result with B
OUT (C),A
XOR A ;XOR A with itself
LD A,0A5H ;Set up port A to read 255
OUT (C),A
IN A,(C)
XOR 0F0H ;XOR A with 0F0H
LD (321H),A ;Store A in memory address 321H
LD A,0A0H ;Set up port A to read 0
OUT (C),A
IN A,(C)
AND 07H ;AND A with 07H
LD (322H),A ;Store A in memory address 322H
LD A,0A8H ;Set up port A to read 8
OUT (C),A
IN A,(C)
AND 0F3H ;AND A with 0F3H
LD (323H),A ;Store A in memory address 323H
LD A,0A8H ;Set up port A to read 8
OUT (C),A
IN A,(C)
AND 0FCH ;AND A with 0FCH
LD (324H),A ;Store A in memory address 324H
LD A,0A8H ;Set up port A to read 8
OUT (C),A
IN A,(C)
AND 03H ;AND A with 03H
LD (325H),A ;Store A in memory address 325H
LD A,0A0H ;Set up port A to read 0
OUT (C),A
IN A,(C)
XOR 0F0H ;XOR A with 0F0H
LD (326H),A ;Store A in memory address 326H
RET