Fix for lpt access by shattered (no whatsnew)

Author: micko

src/mess/drivers/pc.c

@@ -203,13 +203,13 @@ static ADDRESS_MAP_START(pc16_io, AS_IO, 16, pc_state )
 	AM_RANGE(0x00a0, 0x00a1) AM_WRITE8(pc_nmi_enable_w, 0x00ff )
 	AM_RANGE(0x0200, 0x0207) AM_READWRITE8_LEGACY(pc_JOY_r,	pc_JOY_w, 0xffff)
 	AM_RANGE(0x0240, 0x0257) AM_READWRITE8(pc_rtc_r,				pc_rtc_w, 0xffff)
-	AM_RANGE(0x0278, 0x027b) AM_DEVREADWRITE8_LEGACY("lpt_2", pc_lpt_r, pc_lpt_w, 0x00ff)
+	AM_RANGE(0x0278, 0x027b) AM_DEVREADWRITE8_LEGACY("lpt_2", pc_lpt_r, pc_lpt_w, 0xffff)
 	AM_RANGE(0x02b0, 0x02bf) AM_RAM // needed for EC-18xx
 	AM_RANGE(0x02e8, 0x02ef) AM_DEVREADWRITE8("ins8250_3", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x02f8, 0x02ff) AM_DEVREADWRITE8("ins8250_1", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x0340, 0x0357) AM_NOP /* anonymous bios should not recogniced realtimeclock */
-	AM_RANGE(0x0378, 0x037f) AM_DEVREADWRITE8_LEGACY("lpt_1", pc_lpt_r, pc_lpt_w, 0x00ff)
-	AM_RANGE(0x03bc, 0x03bf) AM_DEVREADWRITE8_LEGACY("lpt_0", pc_lpt_r, pc_lpt_w, 0x00ff)
+	AM_RANGE(0x0378, 0x037f) AM_DEVREADWRITE8_LEGACY("lpt_1", pc_lpt_r, pc_lpt_w, 0xffff)
+	AM_RANGE(0x03bc, 0x03bf) AM_DEVREADWRITE8_LEGACY("lpt_0", pc_lpt_r, pc_lpt_w, 0xffff)
 	AM_RANGE(0x03e8, 0x03ef) AM_DEVREADWRITE8("ins8250_2", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x03f0, 0x03f7) AM_READWRITE8_LEGACY(pc_fdc_r,				pc_fdc_w, 0xffff)
 	AM_RANGE(0x03f8, 0x03ff) AM_DEVREADWRITE8("ins8250_0", ins8250_device, ins8250_r, ins8250_w, 0xffff)
@@ -239,13 +239,13 @@ static ADDRESS_MAP_START(ibm5550_io, AS_IO, 16, pc_state )
 	AM_RANGE(0x00a0, 0x00a1) AM_READWRITE8(unk_r, pc_nmi_enable_w, 0x00ff )
 	AM_RANGE(0x0200, 0x0207) AM_READWRITE8_LEGACY(pc_JOY_r, pc_JOY_w, 0xffff)
 	AM_RANGE(0x0240, 0x0257) AM_READWRITE8(pc_rtc_r,				pc_rtc_w, 0xffff)
-	AM_RANGE(0x0278, 0x027b) AM_DEVREADWRITE8_LEGACY("lpt_2", pc_lpt_r, pc_lpt_w, 0x00ff)
+	AM_RANGE(0x0278, 0x027b) AM_DEVREADWRITE8_LEGACY("lpt_2", pc_lpt_r, pc_lpt_w, 0xffff)
 	AM_RANGE(0x02b0, 0x02bf) AM_RAM // needed for EC-18xx
 	AM_RANGE(0x02e8, 0x02ef) AM_DEVREADWRITE8("ins8250_3", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x02f8, 0x02ff) AM_DEVREADWRITE8("ins8250_1", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x0340, 0x0357) AM_NOP /* anonymous bios should not recogniced realtimeclock */
-	AM_RANGE(0x0378, 0x037f) AM_DEVREADWRITE8_LEGACY("lpt_1", pc_lpt_r, pc_lpt_w, 0x00ff)
-	AM_RANGE(0x03bc, 0x03bf) AM_DEVREADWRITE8_LEGACY("lpt_0", pc_lpt_r, pc_lpt_w, 0x00ff)
+	AM_RANGE(0x0378, 0x037f) AM_DEVREADWRITE8_LEGACY("lpt_1", pc_lpt_r, pc_lpt_w, 0xffff)
+	AM_RANGE(0x03bc, 0x03bf) AM_DEVREADWRITE8_LEGACY("lpt_0", pc_lpt_r, pc_lpt_w, 0xffff)
 	AM_RANGE(0x03e8, 0x03ef) AM_DEVREADWRITE8("ins8250_2", ins8250_device, ins8250_r, ins8250_w, 0xffff)
 	AM_RANGE(0x03f0, 0x03f7) AM_READWRITE8_LEGACY(pc_fdc_r,				pc_fdc_w, 0xffff)
 	AM_RANGE(0x03f8, 0x03ff) AM_DEVREADWRITE8("ins8250_0", ins8250_device, ins8250_r, ins8250_w, 0xffff)