View source for Happy Computer 8bit Printer Mod

== Description ==

[[8bit Printer Ports|8bit Printer Port]] mods from german magazine [[Happy Computer (Schneider Sonderheft)]]:

* Happy Computer - Schneider Sonderheft Nr.1 (2/1985) - original DIY for 464
* Happy Computer - Schneider Sonderheft Nr.3 (4/1986) - original DIY for 664/6128
* [[PC Amstrad International]] (issue 8/9'91, page 69-70) - remake of the Happy Computer DIY
* [[KC Compact]] - CPC clone with built-in Happy Computer-style 8bit printer port

== Technical ==

Disconnect the Printer D7 pin from ground, and wire it to the PIOs Tape WR DATA pin instead (That is, Pin 12 of the 8255 chip). That's all about it. No idea why the magazine needed 5 sheets of paper to describe that circuit.

== Scanned Articles ==

<gallery caption="8bit Printer Port for CPC 464">
File:HC 8bit printer 464 1.jpg
File:HC 8bit printer 464 2.jpg
File:HC 8bit printer 464 3.jpg
</gallery>

<gallery caption="8bit Printer Port for CPC 664 / 6128">
File:HC 8bit printer 664 6128 1.jpg
File:HC 8bit printer 664 6128 2.jpg
File:HC 8bit printer 664 6128 3.jpg
</gallery>

== Listings ==

=== CPC 464 ===
 1 REM Happy Computer 1985 - CPC464 8Bit Druck
 2 REM Bruno Kesel
 3 REM Birkenweg 6
 4 REM 6973 Boxberg
 5 REM Tel.: #####/####
 10 REM
 15 MEMORY &9FFF
 20 FOR z=&A000 TO &A036
 30 READ byte:POKE z,byte
 40 NEXT
 45 REM Umlegen der Druckroutine auf Adresse &A000
 50 POKE &BDF2,&0
 60 POKE &BDF3,&A0
 70 DATA &01,&32,&00,&cd,&1b,&08,&30,&07
 90 DATA &10,&f9,&0d,&20,&f6,&b7,&c9,&c5
 100 DATA &20,&ed,&79,&f1,&06,&ef,&e6,&7f
 110 DATA &ed,&79,&f6,&80,&f3,&ed,&79,&e6
 120 DATA &7f,&fb,&ed,&79,&f5,&06,&f6,&3e
 130 DATA &00,&ed,&79,&f1,&c1,&37,&c9

=== CPC 664 ===
 1 REM Happy Computer 1986 - CPC664 8Bit Druck
 10 MEMORY &9FFF
 20 FOR z=&A000 TO &A036
 30 READ b:POKE z,b
 40 NEXT
 50 POKE &BDF2,&0
 60 POKE &BDF3,&A0
 70 DATA &01,&32,&00,&cd,&49,&08,&30,&07
 80 DATA &10,&f9,&0d,&20,&f6,&b7,&c9,&c5
 90 DATA &06,&f6,&cd,&7f,&28,&06,&f5,&3e
 100 DATA &20,&ed,&79,&f1,&06,&ef,&e6,&7f
 110 DATA &ed,&79,&f6,&80,&f3,&ed,&79,&e6
 120 DATA &7f,&fb,&ed,&79,&f5,&06,&f6,&3e
 130 DATA &00,&ed,&79,&f1,&c1,&37,&c9

=== CPC 6128 ===
 1 REM Happy Computer 1986 - CPC6128 8Bit Druck
 10 MEMORY &9FFF
 20 FOR z=&A000 TO &A036
 30 READ b:POKE z,b
 40 NEXT
 50 POKE &BDF2,&0
 60 POKE &BDF3,&A0
 70 DATA &01,&32,&00,&cd,&58,&08,&30,&07
 80 DATA &10,&f9,&0d,&20,&f6,&b7,&c9,&c5
 90 DATA &06,&f6,&cd,&7f,&28,&06,&f5,&3e
 100 DATA &20,&ed,&79,&f1,&06,&ef,&e6,&7f
 110 DATA &ed,&79,&f6,&80,&f3,&ed,&79,&e6
 120 DATA &7f,&fb,&ed,&79,&f5,&06,&f6,&3e
 130 DATA &00,&ed,&79,&f1,&c1,&37,&c9

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