Datapoint 2200 - Revision history

Jnc: /* Further reading */ +Datapoint book

2023-06-04T18:05:58Z

‎Further reading: +Datapoint book

Jnc: /* Version II */ Two instructions could switch modes

2023-06-03T11:17:29Z

‎Version II: Two instructions could switch modes

Jnc: /* External links */ +Texas Instruments TMX 1795

2023-06-03T11:12:26Z

‎External links: +Texas Instruments TMX 1795

Jnc: Improve to a fairly complete description

2023-06-03T04:14:02Z

Improve to a fairly complete description

Jnc: N

2021-12-04T00:48:52Z

New page

==External links==

* [http://datapoint.vintagecomputers.square7.ch/index.html Vintage Computers] - large collection of images

[[Category: Personal Computers]]

← Older revision		Revision as of 18:05, 4 June 2023
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	It had 31 instructions, 14 registers (2 sets of 7, for 'Alpha mode' and 'Beta mode'; two instructions could switch back and forth), and a 16-deep stack (the stack can hold the H,L [[memory address register]] values as well as subroutine return points). It could handle up to 16K bytes of main memory (with a 14 bit wide Program Counter); configurations were available with 4K, 8K, 12K, or 16K bytes.		It had 31 instructions, 14 registers (2 sets of 7, for 'Alpha mode' and 'Beta mode'; two instructions could switch back and forth), and a 16-deep stack (the stack can hold the H,L [[memory address register]] values as well as subroutine return points). It could handle up to 16K bytes of main memory (with a 14 bit wide Program Counter); configurations were available with 4K, 8K, 12K, or 16K bytes.
		+
		+	==Further reading==
		+
		+	* Lamont Wood, ''Datapoint: The Lost Story of the Texans Who Invented the Personal Computer Revolution'', Hugo House, Englewood, Austin, 2012 - details the environment in which the 2200 was created

	==External links==		==External links==

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 When semiconductor RAM became available, the CPU was re-designed to be a [[parallel]] unit, producing the so-called 'Version II' machine, released in early 1972. An [[interrupt]] system was made available for handling peripherals.
-It had 31 instructions, 14 registers (2 sets of 7; for 'Alpha mode' and 'Beta mode'), and a 16-deep stack (the stack can hold the H,L [[memory address register]] values as well as subroutine return points). It could handle up to 16K bytes of main memory (with a 14 bit wide Program Counter); configurations were available with 4K, 8K, 12K, or 16K bytes.
+It had 31 instructions, 14 registers (2 sets of 7, for 'Alpha mode' and 'Beta mode'; two instructions could switch back and forth), and a 16-deep stack (the stack can hold the H,L [[memory address register]] values as well as subroutine return points). It could handle up to 16K bytes of main memory (with a 14 bit wide Program Counter); configurations were available with 4K, 8K, 12K, or 16K bytes.
 ==External links==

@@ Line 35: / Line 35: @@
 ** [http://www.bitsavers.org/pdf/datapoint/2200/pictures/ pictures]
 * [http://archive.computerhistory.org/resources/text/Oral_History/Poor_Victor/102658337.05.01.pdf Oral History of Victor (Vic) Poor] - contains background to the creation of the 2200
 * [http://archive.computerhistory.org/resources/text/Oral_History/Intel_8008/Intel_8008_1.oral_history.2006.102657982.pdf Oral History Panel on the Development and Promotion of the Intel 8008 Microprocessor] - contains information about the attempt to build the Intel 8008 for the CPU
 * [http://datapoint.vintagecomputers.square7.ch/index.html Vintage Computers] - large collection of images
 [[Category: Personal Computers]]