TPDD Base Protocol - Revision history

Jhoger: /* General Reference */

2019-12-12T23:17:41Z

General Reference

← Older revision		Revision as of 16:17, 12 December 2019
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	== General Reference ==		== General Reference ==

	Note that this information was taken from Compuserve archives. Some stuff has been fixed.		Note that this information was taken from Compuserve archives. Some stuff has been fixed. The best way to understand the protocol is to look at existing code like LaddieAlpha or DLPlus.

	If you have changes please suggest or make them.		If you have changes please suggest or make them.

2019-12-12T23:17:05Z

← Older revision		Revision as of 16:17, 12 December 2019
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	== General Reference ==		== General Reference ==

			Note that this information was taken from Compuserve archives. Some stuff has been fixed.

			If you have changes please suggest or make them.

	<UL>		<UL>
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	of bytes from the block format through the data block". Most people (me included)		of bytes from the block format through the data block". Most people (me included)
	don't understand what that involves if you have to calculate it. Fortunately I found an		don't understand what that involves if you have to calculate it. Fortunately I found an
	example of how to do this and so I'm passing it on to you.</P><P>Checksum=(bytes MOD 256) XOR 255</P><P>where bytes = ~~number of~~ bytes including the Request Type, Length and all Data fields		example of how to do this and so I'm passing it on to you.</P><P>Checksum=(sum-of-bytes MOD 256) XOR 255</P><P>where bytes = the bytes including the Request Type, Length and all Data fields
	(but not including the preamble).</P><HR><H2>Using this Information</H2><P>A lot of the above commands can be set up in advance since there is no variable part to		(but not including the preamble).</P><HR><H2>Using this Information</H2><P>A lot of the above commands can be set up in advance since there is no variable part to
	calculate. Some commands must have the length and checksum calculate as the data is built		calculate. Some commands must have the length and checksum calculate as the data is built

2009-04-07T23:09:52Z

Type 11 - Directory reference return

← Older revision		Revision as of 16:09, 7 April 2009
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	* filename - file name - if no name specied is 00H. If at end of directory is 00H.		* filename - file name - if no name specied is 00H. If at end of directory is 00H.
	* attribute - not used		* attribute - not used
	* size - size of file		* size - size of file, big endian format
	* free - number of free sectors (multiply by 1280 for bytes)		* free - number of free sectors (multiply by 1280 for bytes)
	* checksum - see below for calculating		* checksum - see below for calculating

2009-04-07T23:08:39Z

Type 03 - Read file

2009-04-07T23:07:50Z

Type 04 - Write file

← Older revision		Revision as of 16:07, 7 April 2009
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	* Preamble - always 'ZZ'		* Preamble - always 'ZZ'
	* ~~requesr~~ - type 04		* request - type 04
	* length - length of data 01h-80h (actual length of data)		* length - length of data 01h-80h (actual length of data)
	* checksum - see below for calculating		* checksum - see below for calculating

2009-02-23T17:45:53Z

Base Protocol moved to TPDD Base Protocol: Improved title by making it more specific

← Older revision	Revision as of 10:45, 23 February 2009
(No difference)

2009-01-31T07:00:43Z

← Older revision		Revision as of 00:00, 31 January 2009
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	<P>The above commands can be sent directly without any calculating to speed up your		<P>The above commands can be sent directly without any calculating to speed up your
	program. </P>		program. </P>

			[[Category:Model T Developer Reference]]

2008-12-15T03:57:47Z

← Older revision		Revision as of 20:57, 14 December 2008
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	<pre>		<pre>
	Close$ = "ZZ~~"~~+Chr$(2)+Chr$(0)+Chr$(253)		Close$ = "ZZ"+Chr$(2)+Chr$(0)+Chr$(253)
	Dir1$ = ~~"~~ZZ~~"~~+Chr$(0)+Chr$(26)+Space$(24)+~~"~~F~~"~~+Chr$(1)+Chr$(158)		Dir1$ = "ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(1)+Chr$(158)
	Dir2$ = ~~"~~ZZ~~"~~+Chr$(0)+Chr$(26)+Space$(24)+~~"~~F~~"~~+Chr$(2)+Chr$(157)		Dir2$ = "ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(2)+Chr$(157)
	Status$ = ~~"~~ZZ~~"~~+Chr$(7)+Chr$(0)+Chr$(248)+Chr$(13)		Status$ = "ZZ"+Chr$(7)+Chr$(0)+Chr$(248)+Chr$(13)
	Format$ = ~~"~~ZZ~~"~~+Chr$(6)+Chr$(0)+Chr$(249)+Chr$(13)		Format$ = "ZZ"+Chr$(6)+Chr$(0)+Chr$(249)+Chr$(13)
	Erase$ = ~~"~~ZZ~~"~~+Chr$(5)+Chr$(0)+Chr$(250)		Erase$ = "ZZ"+Chr$(5)+Chr$(0)+Chr$(250)
	Seek$(1) = ~~"~~ZZ~~"~~+Chr$(1)+Chr$(1)+Chr$(1)+Chr$(252)		Seek$(1) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(1)+Chr$(252)
	Seek$(2) = ~~"~~ZZ~~"~~+Chr$(1)+Chr$(1)+Chr$(2)+Chr$(251)		Seek$(2) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(2)+Chr$(251)
	Seek$(3) = ~~"~~ZZ~~"~~+Chr$(1)+Chr$(1)+Chr$(3)+Chr$(250)		Seek$(3) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(3)+Chr$(250)
	</pre>		</pre>

	<P>The above commands can be sent directly without any calculating to speed up your		<P>The above commands can be sent directly without any calculating to speed up your
	program. </P>		program. </P>

2008-12-15T03:56:06Z

← Older revision		Revision as of 20:56, 14 December 2008
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	<pre>		<pre>
	Close$ =~~"~~ZZ"+Chr$(2)+Chr$(0)+Chr$(253)		Close$ = "ZZ"+Chr$(2)+Chr$(0)+Chr$(253)
	Dir1$ ="ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(1)+Chr$(158)		Dir1$ = "ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(1)+Chr$(158)
	Dir2$ ="ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(2)+Chr$(157)		Dir2$ = "ZZ"+Chr$(0)+Chr$(26)+Space$(24)+"F"+Chr$(2)+Chr$(157)
	Status$ ="ZZ"+Chr$(7)+Chr$(0)+Chr$(248)+Chr$(13)		Status$ = "ZZ"+Chr$(7)+Chr$(0)+Chr$(248)+Chr$(13)
	Format$ ="ZZ"+Chr$(6)+Chr$(0)+Chr$(249)+Chr$(13)		Format$ = "ZZ"+Chr$(6)+Chr$(0)+Chr$(249)+Chr$(13)
	Erase$ ="ZZ"+Chr$(5)+Chr$(0)+Chr$(250)		Erase$ = "ZZ"+Chr$(5)+Chr$(0)+Chr$(250)
	Seek$(1)="ZZ"+Chr$(1)+Chr$(1)+Chr$(1)+Chr$(252)		Seek$(1) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(1)+Chr$(252)
	Seek$(2)="ZZ"+Chr$(1)+Chr$(1)+Chr$(2)+Chr$(251)		Seek$(2) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(2)+Chr$(251)
	Seek$(3)="ZZ"+Chr$(1)+Chr$(1)+Chr$(3)+Chr$(250)		Seek$(3) = "ZZ"+Chr$(1)+Chr$(1)+Chr$(3)+Chr$(250)
	</pre>		</pre>

	<P>The above commands can be sent directly without any calculating to speed up your		<P>The above commands can be sent directly without any calculating to speed up your
	program. </P>		program. </P>

2008-12-15T03:55:21Z