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(2nd sources)
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The ''Am2900'' had a large number of 2nd sources:
 
The ''Am2900'' had a large number of 2nd sources:
  
* [[Elektronika]]
+
{| class="wikitable"
* [[Fairchild]]
+
! 75 || 76 || 77 || 78 || 79 || 80 || 81 || 82 || 83 || 84 || 85 || 86 || 87 || 88 || 89 || 90 || 91 || 92 || 93 || 94 || 95 || 96
* [[Motorola]], October 1975
+
|-
* [[National]]
+
| colspan="9" | [[Motorola]]
* [[NEC]]
+
|-
* [[Raytheon]], December 1975
+
| colspan="22" | [[Thomson-CSF]]
* [[Signetics]]
+
|-
* [[Thomson-CSF]]
+
| colspan="7" | [[Raytheon]]
* [[Vitesse]], November 1985
+
|-
 +
| colspan="2" | || colspan="15" | [[National]]
 +
|-
 +
| colspan="3" | || colspan="6" | [[Fairchild]]
 +
|-
 +
| colspan="3" | || colspan="3" | [[Signetics]]
 +
|-
 +
| colspan="3" | || colspan="6" | [[NEC]]
 +
|-
 +
| colspan="5" | || colspan="2" | [[OKI]]
 +
|-
 +
| colspan="10" | || colspan="7" | [[Cypress]]
 +
|-
 +
| colspan="11" | || colspan="3" | [[Vitesse]]
 +
|-
 +
| colspan="11" | || colspan="11" | [[Elektronika]]
 +
|}
  
 
== Design ==
 
== Design ==

Revision as of 13:53, 1 November 2015

The AMD Am2900 is a family of 4-bit bit-slice chips designed by Advanced Micro Devices and introduced to the market in August 1975. Each component represents an individual unit in a microprocessor. Designed to be flexible and expandable, those chips were capable of emulating a large number of existing systems. Made in bipolar technology allowed for higher speeds (8.3-12Mhz, later up to 32). Its flexibility, higher speed, unusually large amount of 2nd sources, and good marketing allowed AMD to dominate the bit-slice market. To date, the Am2900 family is used as the de facto baseline for bit-slice design.

Family Members
Part Description
AM2901
AM2901A
AM2901B
4-bit ALU
AM2902 Carry-lookahead generator
AM2903
AM2903A
4-bit ALU, Enhanced version of the 2901
AM2904 Status and shift control unit
AM2905 Quad 2-input bus transceiver
AM2906 Quad 2-input bus transceiver with parity
AM2907
AM2908
Quad bus transceiver with interface logic
AM2909
AM2909A
AM2911
4-bit-slice address sequencer
AM2910 12-bit address sequencer
AM2912 Quad bus transceiver
AM2913 Priority interrupt expander
AM2914 Priority interrupt controller
AM2915
AM2916
AM2917
Quad 3-state bus transceiver
AM2918
AM29LS18
Quad D register
AM2919 Quad register
AM2920 Octal D flip-flip register
AM2921 1-to-8 decoder
AM2922
AM2923
8-input MUX
AM2924 3-to-8 decoder
AM2925 Clock generator
AM2926
AM2929
3-state quad bus driver
AM2927
AM2928
Quad 3-state Bus Transceiver
AM2930 Program control unit
AM2932 Program control unit for push/pop stack
AM2940 DMA Address generator
AM2940 Timer/Counter/DMA Address generator
AM2946
AM2947
AM2948
AM2949
Octal 3-state bidirectional bus transceiver
AM2950
AM2951
Bidirectional I/O Port
AM2954
AM2955
Octal registers
AM2956
AM2957
Octal latches
AM2958
AM2959
Octal buffer
AM2960 16-bit error detection and correction unit
AM2961
AM2962
4-bit error correction bus buffer
AM2964 Dynamic memory controller
AM2965
AM2966
Octal dynamic memory driver

2nd sources

The Am2900 had a large number of 2nd sources:

75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
Motorola
Thomson-CSF
Raytheon
National
Fairchild
Signetics
NEC
OKI
Cypress
Vitesse
Elektronika

Design

The family includes two 4-bit ALUs - 2901 and a 2903. The AM2901/A was the original chip designed, supporting 8 different basic operations. The AM2903/A was an enhanced version designed a bit later which included 7 additional operations. The slices can be stacked to produce 8, 12, or 16 data paths and memory addresses for use in larger programs.

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