Digiblaster howto - Revision history

TFM: /* Diagram (Digiblaster v2) (Joshua) */

2017-11-06T08:08:45Z

Diagram (Digiblaster v2) (Joshua)

← Older revision		Revision as of 08:08, 6 November 2017
Line 122:		Line 122:
	''Converted 1996/1998 by [[Octoate]]'''		''Converted 1996/1998 by [[Octoate]]'''

	[[Category:Programming]] [[Category:Printers and printer ports]] [[Category:Music and sound~~]][[Category:DIY~~]]		[[Category:Digiblaster]]
			[[Category:DIY]]
			[[Category:Programming]]
			[[Category:Printers and printer ports]]
			[[Category:Music and sound]]

Polluks: /* The programming */ typo

2016-07-24T02:38:57Z

The programming: typo

← Older revision		Revision as of 02:38, 24 July 2016
Line 43:		Line 43:

	The program writes directly to the hardware of the CPC.		The program writes directly to the hardware of the CPC.
	You can use the port with the ~~adress~~ &EFxx.		You can use the port with the address &EFxx.
	Because the CPC has only a 7bit printer port (we need 8bit for the Digiblaster) we use the STROBE signal, which is inverted by the hardware, so you have to invert your sound value.		Because the CPC has only a 7bit printer port (we need 8bit for the Digiblaster) we use the STROBE signal, which is inverted by the hardware, so you have to invert your sound value.
	Now we want to output the value &C5:		Now we want to output the value &C5:

	LD a,&C5 ;A=&C5		LD a,&C5 ;A=&C5
	LD B,&EF ;load the port ~~adress~~		LD B,&EF ;load the port address
	XOR &80 ;invert the 7th bit		XOR &80 ;invert the 7th bit
	OUT (C),A ;out to the printer port		OUT (C),A ;out to the printer port

MacDeath at 19:00, 19 December 2010

2010-12-19T19:00:26Z

← Older revision		Revision as of 19:00, 19 December 2010
Line 122:		Line 122:
	''Converted 1996/1998 by [[Octoate]]'''		''Converted 1996/1998 by [[Octoate]]'''

	[[Category:Programming]] [[Category:Printers and printer ports]] [[Category:Music and sound]]		[[Category:Programming]] [[Category:Printers and printer ports]] [[Category:Music and sound]][[Category:DIY]]

MacDeath at 19:00, 19 December 2010

2010-12-19T19:00:04Z

← Older revision		Revision as of 19:00, 19 December 2010
Line 122:		Line 122:
	''Converted 1996/1998 by [[Octoate]]'''		''Converted 1996/1998 by [[Octoate]]'''

	[[Category:Programming]] [[Category:~~Hardware~~]] [[Category:~~DIY~~]]		[[Category:Programming]] [[Category:Printers and printer ports]] [[Category:Music and sound]]

Nocash: /* The programming */

2010-03-05T00:10:46Z

The programming

← Older revision		Revision as of 00:10, 5 March 2010
Line 47:		Line 47:
	Now we want to output the value &C5:		Now we want to output the value &C5:

	~~<pre>~~		LD a,&C5 ;A=&C5
	~~LD a,&C5 ;A=&C5~~		LD B,&EF ;load the port adress
	~~LD B,&EF ;load the port adress~~		XOR &80 ;invert the 7th bit
	~~XOR &80 ;invert the 7th bit~~		OUT (C),A ;out to the printer port
	~~OUT (C),A ;out to the printer port~~

	LD a,&C5 ;A=&C5
	LD B,&EF ;load the port adress
	XOR &80 ;invert the 7th bit
	OUT (C),A ;out to the printer port
	~~</pre>~~

	The accu is the register A.		The accu is the register A.

Octoate: added categories (Hardware and DIY)

2010-02-27T11:56:42Z

added categories (Hardware and DIY)

← Older revision		Revision as of 11:56, 27 February 2010
Line 129:		Line 129:
	''Converted 1996/1998 by [[Octoate]]'''		''Converted 1996/1998 by [[Octoate]]'''

	[[Category:Programming]]		[[Category:Programming]] [[Category:Hardware]] [[Category:DIY]]

Octoate: /* Diagram (Digiblaster v2) (Joshua) */ - it wasn't the Joshua from the group Exodus

2010-02-10T20:43:21Z

Diagram (Digiblaster v2) (Joshua): - it wasn't the Joshua from the group Exodus

← Older revision		Revision as of 20:43, 10 February 2010
Line 108:		Line 108:
	[[Image:Digiblaster_diagram_v1.png]]		[[Image:Digiblaster_diagram_v1.png]]

	== Diagram (Digiblaster v2) (Joshua~~/Exodus~~) ==		== Diagram (Digiblaster v2) (Joshua) ==

	[[Image:digiblaster diagram.jpg]]		[[Image:digiblaster diagram.jpg]]

Nocash: /* Notes and Differences between v1 and v2 */

2010-01-08T18:05:30Z

Notes and Differences between v1 and v2

← Older revision		Revision as of 18:05, 8 January 2010
Line 88:		Line 88:
	''[[Face Hugger\|A. Stroiczek]]''		''[[Face Hugger\|A. Stroiczek]]''

	== ~~Notes and~~ Differences between v1 and v2 ==		== Differences between v1 and v2 ==

	Both versions are doing more or less the same (and are compatible at software side). Both versions produce linear D/A conversion (though in v1 the conversion is glitchy, v2 is more accurate). Also, in v2, the 470 Ohm POT is replaced by a normal 470 Ohm resistor plus 22uF capacitor.		Both versions are doing more or less the same (and are compatible at software side). Both versions produce linear D/A conversion (though in v1 the conversion is glitchy, v2 is more accurate). Also, in v2, the 470 Ohm POT is replaced by a normal 470 Ohm resistor plus 22uF capacitor.
Line 97:		Line 97:
	v2 1K 2K 4K 8K 16K 32K 64K 128K		v2 1K 2K 4K 8K 16K 32K 64K 128K
	Where v1 uses standard E12-series values. Whilst v2 uses less common values like 2K (which you may not have at home), and even totally non-standard values like 4K (which aren't manufactured, and need to be produced by using two 2K resistors).		Where v1 uses standard E12-series values. Whilst v2 uses less common values like 2K (which you may not have at home), and even totally non-standard values like 4K (which aren't manufactured, and need to be produced by using two 2K resistors).

			== Notes ==

	* '''Caution''' Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).		* '''Caution''' Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).

Nocash: /* Differences between v1 and v2 */

2010-01-08T18:02:19Z

Differences between v1 and v2

← Older revision		Revision as of 18:02, 8 January 2010
Line 88:		Line 88:
	''[[Face Hugger\|A. Stroiczek]]''		''[[Face Hugger\|A. Stroiczek]]''

	== Differences between v1 and v2 ==		== Notes and Differences between v1 and v2 ==

	Both versions are doing more or less the same (and are compatible at software side). Both versions produce linear D/A conversion (though in v1 the conversion is glitchy, v2 is more accurate). Also, in v2, the 470 Ohm POT is replaced by a normal 470 Ohm resistor plus 22uF capacitor.		Both versions are doing more or less the same (and are compatible at software side). Both versions produce linear D/A conversion (though in v1 the conversion is glitchy, v2 is more accurate). Also, in v2, the 470 Ohm POT is replaced by a normal 470 Ohm resistor plus 22uF capacitor.

	The different resistor values are:		The different resistor values are:
	D7 D6 D5 D4 D3 D2 D1 D0		STB D6 D5 D4 D3 D2 D1 D0
	v1 1K 2K2 4K7 10K 22K 39K 82K 150K		v1 1K 2K2 4K7 10K 22K 39K 82K 150K
	v2 1K 2K 4K 8K 16K 32K 64K 128K		v2 1K 2K 4K 8K 16K 32K 64K 128K
Line 99:		Line 99:

	* '''Caution''' Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).		* '''Caution''' Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).

			* As said above, Strobe is inverted by the CPC's printer port hardware. And, when using '''unsigned''' samples, it must be actually inverted by software. However, with '''signed''' samples, that hardware feature is just perfect, and no inversion is needed.

	== Diagram (Digiblaster v1) (Andreas Stroiczek) ==		== Diagram (Digiblaster v1) (Andreas Stroiczek) ==

Nocash: /* Differences between v1 and v2 */

2010-01-07T12:50:11Z

Differences between v1 and v2

← Older revision		Revision as of 12:50, 7 January 2010
Line 98:		Line 98:
	Where v1 uses standard E12-series values. Whilst v2 uses less common values like 2K (which you may not have at home), and even totally non-standard values like 4K (which aren't manufactured, and need to be produced by using two 2K resistors).		Where v1 uses standard E12-series values. Whilst v2 uses less common values like 2K (which you may not have at home), and even totally non-standard values like 4K (which aren't manufactured, and need to be produced by using two 2K resistors).

	'''Caution'''		* '''Caution''' Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).

	Both schematics connect GND to Pin9, which works on the CPC's (unmodified) [[Connector:Printer_port\|7bit printer port]], but not on (upgraded) [[8bit Printer Ports]], so better connect GND elsewhere (eg. Pin19).

	== Diagram (Digiblaster v1) (Andreas Stroiczek) ==		== Diagram (Digiblaster v1) (Andreas Stroiczek) ==