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	<id>https://wiki.amstrad-cpc.net/index.php?action=history&amp;feed=atom&amp;title=BIOS_Text_Functions</id>
	<title>BIOS Text Functions - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://wiki.amstrad-cpc.net/index.php?action=history&amp;feed=atom&amp;title=BIOS_Text_Functions"/>
	<link rel="alternate" type="text/html" href="https://wiki.amstrad-cpc.net/index.php?title=BIOS_Text_Functions&amp;action=history"/>
	<updated>2026-09-04T11:59:01Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.46.0</generator>
	<entry>
		<id>https://wiki.amstrad-cpc.net/index.php?title=BIOS_Text_Functions&amp;diff=63367&amp;oldid=prev</id>
		<title>MacDeath at 16:41, 19 December 2010</title>
		<link rel="alternate" type="text/html" href="https://wiki.amstrad-cpc.net/index.php?title=BIOS_Text_Functions&amp;diff=63367&amp;oldid=prev"/>
		<updated>2010-12-19T16:41:41Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw-interface=&quot;&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 16:41, 19 December 2010&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l54&quot;&gt;Line 54:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 54:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   BDD6 HOOK_TXT_UNWRITE        ;in: H=x, L=y, out: A=char, Z=space, cy=1=okay&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   BDD6 HOOK_TXT_UNWRITE        ;in: H=x, L=y, out: A=char, Z=space, cy=1=okay&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   BDD9 HOOK_TXT_OUT_ACTION     ;in: A=char&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   BDD9 HOOK_TXT_OUT_ACTION     ;in: A=char&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:BIOS]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>MacDeath</name></author>
	</entry>
	<entry>
		<id>https://wiki.amstrad-cpc.net/index.php?title=BIOS_Text_Functions&amp;diff=63366&amp;oldid=prev</id>
		<title>Nocash: Created page with &#039;== Text Character Output (and read-back from VRAM) ==   BB5A TXT_OUTPUT        in: A=char ;display 20h..FFh, or handle 00h..1Fh   BB5D TXT_WR_CHAR       in: A=char ;display 00h..…&#039;</title>
		<link rel="alternate" type="text/html" href="https://wiki.amstrad-cpc.net/index.php?title=BIOS_Text_Functions&amp;diff=63366&amp;oldid=prev"/>
		<updated>2010-01-24T21:57:56Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;#039;== Text Character Output (and read-back from VRAM) ==   BB5A TXT_OUTPUT        in: A=char ;display 20h..FFh, or handle 00h..1Fh   BB5D TXT_WR_CHAR       in: A=char ;display 00h..…&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Text Character Output (and read-back from VRAM) ==&lt;br /&gt;
  BB5A TXT_OUTPUT        in: A=char ;display 20h..FFh, or handle 00h..1Fh&lt;br /&gt;
  BB5D TXT_WR_CHAR       in: A=char ;display 00h..FFh&lt;br /&gt;
  BB60 TXT_RD_CHAR       out: A=char, Z=space, cy=1=okay&lt;br /&gt;
&lt;br /&gt;
== Text Cursor Position ==&lt;br /&gt;
  BB6F TXT_SET_COLUMN    in: A=x&lt;br /&gt;
  BB72 TXT_SET_ROW       in: A=y&lt;br /&gt;
  BB75 TXT_SET_CURSOR    in: H=x, L=y&lt;br /&gt;
  BB78 TXT_GET_CURSOR    out: H=x, L=y&lt;br /&gt;
  BB87 TXT_VALIDATE      io: H=x, L=y, out: cy: 1=position ok, 0=scroll&lt;br /&gt;
  BB63 TXT_SET_GRAPHIC   in: A=0=normal text position, A&amp;gt;0=graphics position&lt;br /&gt;
&lt;br /&gt;
== Text Cursor... ==&lt;br /&gt;
  BB7B TXT_CUR_ENABLE&lt;br /&gt;
  BB7E TXT_CUR_DISABLE&lt;br /&gt;
  BB81 TXT_CUR_ON&lt;br /&gt;
  BB84 TXT_CUR_OFF&lt;br /&gt;
  BB8A TXT_PLACE_CURSOR&lt;br /&gt;
  BB8D TXT_REMOVE_CURSOR&lt;br /&gt;
&lt;br /&gt;
== Text Colors ==&lt;br /&gt;
  BB90 TXT_SET_PEN       in: A=foreground color 0..15&lt;br /&gt;
  BB93 TXT_GET_PEN       out: A=foreground color 0..15&lt;br /&gt;
  BB96 TXT_SET_PAPER     in: A=background color 0..15&lt;br /&gt;
  BB99 TXT_GET_PAPER     out: A=background color 0..15&lt;br /&gt;
  BB9C TXT_INVERSE       exchange foreground and background colors&lt;br /&gt;
  BB9F TXT_SET_BACK      in: A=0=normal, A=1=transparent/OR&lt;br /&gt;
  BBA2 TXT_GET_BACK      out: Z=normal, NZ=transparent/OR&lt;br /&gt;
&lt;br /&gt;
== Text Character Set ==&lt;br /&gt;
  BBA5 TXT_GET_MATRIX    in: A=char, out: HL=char bitmap ptr, cy:0=ROM,1=RAM&lt;br /&gt;
  BBA8 TXT_SET_MATRIX    in: A=char, HL=ptr to 8x8 char bitmap&lt;br /&gt;
  BBAB TXT_SET_M_TABLE   in: D=00h=RAM, E=1st char, HL=RAM chars, out: cy,A,HL&lt;br /&gt;
  BBAE TXT_GET_M_TABLE   out: cy=1=RAM, A=1st char, HL=RAM chars&lt;br /&gt;
&lt;br /&gt;
== Text Windows (aka Streams) ==&lt;br /&gt;
  BB66 TXT_SET_WINDOW    in: H=x1, L=y1, D=x2, E=y2 (x=0..79, y=0..24)&lt;br /&gt;
  BB69 TXT_GET_WINDOW    out: H=x1, L=y1, D=x2, E=y2, cy=0=hardware scrolling&lt;br /&gt;
  BB6C TXT_CLEAR_WINDOW  fill window by PAPER color&lt;br /&gt;
  BBB4 TXT_STR_SELECT    in: A=new window number, out: A=old (# 0..7)&lt;br /&gt;
  BBB7 TXT_SWAP_STREAMS  in: B,C=window numbers to be exchanged&lt;br /&gt;
&lt;br /&gt;
== Text Init/Specials ==&lt;br /&gt;
  BB4E TXT_INITIALIZE&lt;br /&gt;
  BB51 TXT_RESET&lt;br /&gt;
  BB54 TXT_VDU_DISABLE&lt;br /&gt;
  BB57 TXT_VDU_ENABLE&lt;br /&gt;
  BBB1 TXT_GET_CONTROLS  out: HL=ptr to table of control characters&lt;br /&gt;
  BD40 TXT_ASK_STATE_664 ;out: A(b0=CUR_EN,b1=CUR_ON,b7=VDU) (664 and up only)&lt;br /&gt;
  BDCD HOOK_TXT_DRAW_CURSOR&lt;br /&gt;
  BDD0 HOOK_TXT_UNDRAW_CURSOR&lt;br /&gt;
  BDD3 HOOK_TXT_WRITE_CHAR     ;in: H=x, L=y, A=char&lt;br /&gt;
  BDD6 HOOK_TXT_UNWRITE        ;in: H=x, L=y, out: A=char, Z=space, cy=1=okay&lt;br /&gt;
  BDD9 HOOK_TXT_OUT_ACTION     ;in: A=char&lt;/div&gt;</summary>
		<author><name>Nocash</name></author>
	</entry>
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