8bit Printer Ports - Revision history

SerErris: /* CPC Schneider International - 8 bit Printer Port Mod */

2022-02-27T02:12:12Z

‎CPC Schneider International - 8 bit Printer Port Mod

Fgbrain at 22:10, 27 April 2012

2012-04-27T22:10:10Z

MacDeath at 16:53, 19 December 2010

2010-12-19T16:53:52Z

Nocash: /* External Printer Ports */

2010-10-02T03:48:07Z

‎External Printer Ports

Nocash: /* External Printer Ports */

2010-10-02T03:47:37Z

‎External Printer Ports

Nocash: /* External Printer Ports */

2010-09-30T13:21:46Z

‎External Printer Ports

Nocash: /* External Printer Ports */

2010-09-29T01:25:08Z

‎External Printer Ports

Nocash: /* External Printer Ports */

2010-09-15T22:31:42Z

‎External Printer Ports

Nocash: /* External Printer Ports */

2010-09-15T21:59:53Z

‎External Printer Ports

Nocash: renamed OS to firmware; OS is confusing too, implies sth like msdos/cpm/windows, bios or firmware should be clearer

2010-09-12T16:08:12Z

renamed OS to firmware; OS is confusing too, implies sth like msdos/cpm/windows, bios or firmware should be clearer

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 === CPC Schneider International - 8 bit Printer Port Mod ===
-DIY from [[CPC Schneider International]] (issue 12'85, page 64), this solution uses joystick port pin 8 (or (keyboard?) pin 2, unclear?).
+DIY from [[CPC Schneider International]] (issue 12'85, page 64), this solution uses joystick port pin 8 or keyboard connector pin 2. Both PINs are connected to Pin 11 of the 74LS145 Decoder.
 * For details see: [[CPCI 8bit Printer Mod]]

@@ Line 1: / Line 1: @@
-The CPC [[Printer Port]] has only 7 bit data. Which is sufficient for english 7 bit ASCII character sets, but not enough for 8 bit character sets. Also, printing bitmap graphics usually requires 8 bit data (though usually can also print 7 pixels columns combined with a reduced line-feed rate). Amstrad's DMP1 works perfectly with 7 bit, but Amstrad's later DMP2000/DMP2160 include a few functions that won't work on 7 bit ports - so even the official CPC printers aren't fully compatible with the CPC printer port.
+The CPC [[Printer Port]] has only 7 bit data. Which is sufficient for English 7 bit ASCII character sets, but not enough for 8 bit character sets. Also, printing bitmap graphics usually requires 8 bit data (though usually can also print 7 pixels columns combined with a reduced line-feed rate). Amstrad's DMP1 works perfectly with 7 bit, but Amstrad's later DMP2000/DMP2160 include a few functions that won't work on 7 bit ports - so even the official CPC printers aren't fully compatible with the CPC printer port.
 == Internal 8 bit Printer Ports/Mods ==
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 * Centronics to serial 8-pin DIN Adaptor for "Gabriele 9009" daisy-wheel printer from Triumph-Adler (DIY, [[CPC Schneider International]] 12-1985, pages 88, 89)
 * KDS Printer T Switch ([[KDS]]) - allows to connect 2 printers, the desired printer can be selected via software
 == See also ==

← Older revision		Revision as of 16:53, 19 December 2010
Line 59:		Line 59:
	* [[Amstrad/Schneider Printer Support for 7bit Printer Ports]]		* [[Amstrad/Schneider Printer Support for 7bit Printer Ports]]

−	[[Category:~~Hardware~~]] [[Category:DIY]]	+	[[Category:Printers and printer ports]] [[Category:DIY]]

@@ Line 52: / Line 52: @@
 * Centronics to serial 8-pin DIN Adaptor for "Gabriele 9009" daisy-wheel printer from Triumph-Adler (DIY, [[CPC Schneider International]] 12-1985, pages 88, 89)
-* KDS Printer T Switch ([[KDS]]) (allows to connect 2 printers, the desired printer can be selected via software)
+* KDS Printer T Switch ([[KDS]]) - allows to connect 2 printers, the desired printer can be selected via software
 == See also ==

@@ Line 42: / Line 42: @@
 * [[RS232|RS232 Interfaces]] (various manufacturers) - can be used to access RS232-compatible printers with full '''8 bit''' support
 * [[Schneiderware Centronics Port]] - connects (via a separate motherboard) to Expansion Port (uses a [[8255 PPI chip]])
 Also, reportedly, the following external hardware exists:
@@ Line 50: / Line 49: @@
 * 8 bit Printer Port with 16 bit I/O port ([[HoneySoft]]) (see [[Media:Amstrad Computer User8509037.jpg|advert]])
-There's nothing else known about that hardware.
+Other external printer-related hardware (though not 8bit related):
 == See also ==

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 * [[8bit Printer Port (Amstrad Action)]] (DIY) - connects to Expansion Port (uses Port FBF8h/FBF9h)
 * [[8bit Printer Port (Paul Bauriedl)]] (DIY) - connects to Printer Port (splits port EFxxh to 2 x 4 bit)
 * [[CPCI 8bit Printer Mod]] (DIY) - connects bit 7 to Joystick_1_Select signal (can be connected internally or externally)
 * [[CPCISA by Yarek]] can be used with various ISA bus printer cards (8bit, one- or bi-directional types, SPP, XPP, EPP, etc.)

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 === 8 bit Printer Port in KC Compact ===
-The [[KC Compact]] uses the bit 5 of [[8255|PPI]] Port C as 8th printer bit (this is same as the Happy Computer mod, see above). Although the 8th bit is a built-in feature, the KC Compact OS doesn't support it. But it's supported by [[FutureOS]].
+The [[KC Compact]] uses the bit 5 of [[8255|PPI]] Port C as 8th printer bit (this is same as the Happy Computer mod, see above). Although the 8th bit is a built-in feature, the KC Compact Firmware doesn't support it. But it's supported by [[FutureOS]].
 === 8 bit Printer Port in Aleste 520EX ===
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 === 8 bit Printer Port in CPC Plus ===
-In the CPC Plus, Bit 3 of [[CRTC]] Register 0Ch can be used as eighth printer bit. For compatibility to normal CPCs, this feature can be disabled by removing the 10 kOhm resistor R30 on the mainboard (aka R130 in the schematic). See [[LK Links]] for more info. Although the 8th bit is a built-in feature, the CPC Plus BASIC/OS doesn't support it. However the 8 bit printer port of the CPC Plus is supported by [[FutureOS]].
+In the CPC Plus, Bit 3 of [[CRTC]] Register 0Ch can be used as eighth printer bit. For compatibility to normal CPCs, this feature can be disabled by removing the 10 kOhm resistor R30 on the mainboard (aka R130 in the schematic). See [[LK Links]] for more info. Although the 8th bit is a built-in feature, the CPC Plus Firmware doesn't support it. However the 8 bit printer port of the CPC Plus is supported by [[FutureOS]].
 == External Printer Ports ==