Amstrad/Schneider Printer Character Sets - Revision history

MacDeath at 00:35, 17 December 2010

2010-12-17T00:35:54Z

Nocash: /* DMP3000/DMP3160 fonts */

2010-09-16T17:10:26Z

‎DMP3000/DMP3160 fonts

Nocash: /* Character Set ROMs */

2010-09-16T15:35:03Z

‎Character Set ROMs

Nocash: /* DMP3000/DMP3160 fonts */

2010-09-16T15:23:35Z

‎DMP3000/DMP3160 fonts

Nocash: /* DMP3000 fonts */

2010-09-16T15:23:05Z

‎DMP3000 fonts

Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /mnt/cpcwiki-httpdocs/includes/diff/DairikiDiff.php on line 434

Nocash: /* Character Set ROMs */

2010-09-15T21:39:42Z

‎Character Set ROMs

Nocash: /* NLQ401 fonts */

2010-09-08T23:57:42Z

‎NLQ401 fonts

Nocash: /* DMP2000/2160 fonts */

2010-09-06T11:38:28Z

‎DMP2000/2160 fonts

Nocash: /* IBM Character Set (DMP3000/3160) */

2010-09-05T23:36:21Z

‎IBM Character Set (DMP3000/3160)

Nocash: /* IBM Character Set (DMP3000/3160) */

2010-09-05T23:31:55Z

‎IBM Character Set (DMP3000/3160)

← Older revision		Revision as of 00:35, 17 December 2010
Line 1:		Line 1:
		+	[[Category:Peripherals]] [[Category:Printers and printer ports]]
	{{AmstradPrinterLinks}}		{{AmstradPrinterLinks}}
	<br>		<br>

@@ Line 42: / Line 42: @@
 NLQ-pass-2 chr(100h..14Bh), 76 special "IBM" symbols
 C00 NLQ-pass-3+4 lower half of IBM NLQ symbols (same data used for both passes)
 '''Notes:'''The draft symbols in first 4K of DMP3000 aren't yet dumped (though they are likely to be same as in DMP3160). In the DMP3160 BIOS Dump, the NLQ "á" is damaged; NLQ-pass-2 chr(13Fh), address 7AF8h is 00h (it's intact, 2Ah, in DMP3000 BIOS Dump).<br>
 '''Encoding/Mechanics:''' Same as DMP2000/2160, see there. A special case are the IBM symbols which are defined as two characters each (one holding the upper half, one the lower half, which is required for block graphic and border symbols) (accordingly it takes 4 passes for IBM-NLQ symbols, and 2 passes for IBM-Draft symbols).

← Older revision		Revision as of 15:35, 16 September 2010
Line 5:		Line 5:

	Here are some Draft and NLQ charsets extracted from the EPROMs. In case of the DMP2000/DMP3000, additional Draft characters are probably contained in the CPUs on-chip ROM.		Here are some Draft and NLQ charsets extracted from the EPROMs. In case of the DMP2000/DMP3000, additional Draft characters are probably contained in the CPUs on-chip ROM.
		+	The red arrow indicates underlengths (where the 8bit data is shifted down to the lower 8-pins). The blue line indicates the pre-defined width for use in proportional mode.

	<gallery>		<gallery>

@@ Line 41: / Line 41: @@
 NLQ-pass-2 chr(100h..14Bh), 76 special "IBM" symbols
 C00 NLQ-pass-3+4 lower half of IBM NLQ symbols (same data used for both passes)
-'''Notes:'''The draft symbols in first 4K of DMP3000 aren't yet dumped (though they are likely to be same as in DMP3160). In the DMP3160 BIOS Dump, the NLQ "á" is damaged; NLQ-pass-2 chr(13Fh), address 7AF8h is 00h (it's intact, 2Ah, in DMP3000 BIOS Dump)
+'''Notes:'''The draft symbols in first 4K of DMP3000 aren't yet dumped (though they are likely to be same as in DMP3160). In the DMP3160 BIOS Dump, the NLQ "á" is damaged; NLQ-pass-2 chr(13Fh), address 7AF8h is 00h (it's intact, 2Ah, in DMP3000 BIOS Dump).<br>
 '''Encoding/Mechanics:''' Same as DMP2000/2160, see there. A special case are the IBM symbols which are defined as two characters each (one holding the upper half, one the lower half, which is required for block graphic and border symbols) (accordingly it takes 4 passes for IBM-NLQ symbols, and 2 passes for IBM-Draft symbols).

@@ Line 26: / Line 26: @@
 '''Mechanical Restrictions:''' After drawing a draft pixel, the next ONE pixel (in the same row) must be white. There is no such restriction for NLQ pixels (because they are defined in a lousy resolution).
-=== DMP3000 fonts ===
+=== DMP3000/DMP3160 fonts ===
-* Draft font: ASCII chars probably somewhere in uPD7811 ROM (not dumped), IBM chars at EPROM offset 5000h..5xxxh
+Character set memory map:
-* NLQ font: circa 330 characters, at EPROM offset 5C00h..6BFFh (pass1) and 6C00h..7BFFh (pass2); ASCII, Italics, IBM characters
+C0 Draft chr(00h..7Fh), ASCII & International (normal)
-'''Encoding/Mechanics:''' Same as DMP2000/2160, see there.
+C0 Draft chr(00h..7Fh), ASCII & International (italics)
 == International Characters ==

@@ Line 7: / Line 7: @@
 <gallery>
-File:DMP2000 Charset.png|DMP2000/DMP2160
+File:DMP2000 Charset.png|DMP2000/DMP2160 (incomplete)
-File:DMP3000 Charset.png|DMP3000
+File:DMP3000 Charset.png|DMP3000 (incomplete)
-File:NLQ401 Charset.png|NLQ401
+File:DMP3160 Charset.png|DMP3160 (complete)
 </gallery>

@@ Line 16: / Line 16: @@
 * NLQ font: 103 characters, at EPROM offset 209Eh..3FFFh (pass1+pass2); ASCII characters
 '''Encoding:''' 11 bytes per Draft character (same as Epson chars, but without prefix byte), 39 bytes per NLQ pass (in super-high horizontal resolution; about 3-4 times better than the later DMP2000..3000 models). In lack of prefix flags, underlengths are defined by software (at ROM address 090Eh..091Ch).<br>
-'''Mechanical Restrictions:''' After drawing a draft pixel, the next ONE pixel (in the same row) must be white. After a NLQ pixel, the next THREE must be white.
+'''Mechanical Restrictions:''' After drawing a draft pixel, the next ONE pixel (in the same row) must be white. After a NLQ pixel, the next THREE must be white.<br>
 === DMP2000/2160 fonts ===

@@ Line 21: / Line 21: @@
 * Draft font: probably somewhere in uPD7811 ROM (not dumped)
 * NLQ font: 128 characters, at EPROM offset 3400h..39FFh (pass1) and 3A00h..3FFFh (pass2); ASCII characters
-'''Encoding:''' 12 bytes per char (one prefix, plus eleven 8bit columns; the prefix contains underlength flag, and proportional char width info; same format as with ESC "&" command), 2-pass NLQ characters are defined identically as two draft characters (the prefix byte is having the same value in both definitions)<br>
+'''Encoding:''' 12 bytes per char (one prefix, plus eleven 8bit columns; the prefix contains underlength flag, and proportional char width info; same format as with [[Amstrad/Schneider Printer Control Codes|ESC "&" command]]), 2-pass NLQ characters are defined identically as two draft characters (the prefix byte is having the same value in both definitions)<br>
 '''Mechanical Restrictions:''' After drawing a draft pixel, the next ONE pixel (in the same row) must be white. There is no such restriction for NLQ pixels (because they are defined in a lousy resolution).

@@ Line 82: / Line 82: @@
 |E0h||alp|| ß || xx|| xx|| xx|| xx|| µ || xx|| xx|| xx|| xx|| xx|| xx|| xx|| xx|| xx
 |-
-|F0h||xx || ± || >=|| <=|| xx|| xx|| ÷ || xx|| ° || xx|| xx||sqr|| ^n|| ² || xx||
+|F0h||xx || ± || >=|| <=|| xx|| xx|| ÷ || xx|| ° || xx|| xx||sqr|| ^n|| ² || • ||
 |-
 |}

@@ Line 70: / Line 70: @@
 |80h|| Ç || ü || é || â || ä || à || å || ç || ê || ë || è || ï || î || ì || Ä || Å
 |-
-|90h|| É || æ || Æ || ô || ö || ò || û || ù || ÿ || Ö || Ü || ¢ || £ || ¥ || pt|| ƒ
+|90h|| É || æ || Æ || ô || ö || ò || û || ù || ÿ || Ö || Ü || ¢ || £ || ¥ || Pt|| ƒ
 |-
 |A0h|| á || í || ó || ú || ñ || Ñ || ª || º || ¿ || xx|| ¬ || ½ || ¼ || ¡ || « || »