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The '''AMD Am2900''' is a [[microprocessor family|family]] of [[4-bit architecture|4-bit]] [[bit-slice microprocessor|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 microprocessor|bit-slice]] market. To date, the Am2900 family is used as the de facto baseline for bit-slice design. | The '''AMD Am2900''' is a [[microprocessor family|family]] of [[4-bit architecture|4-bit]] [[bit-slice microprocessor|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 microprocessor|bit-slice]] market. To date, the Am2900 family is used as the de facto baseline for bit-slice design. | ||
| − | + | {| class="wikitable" style="float: right;" | |
| − | + | ! colspan="2" | Family Members | |
| − | + | |- | |
! Part !! Description | ! Part !! Description | ||
|- | |- | ||
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| {{amd|AM2965}}<br />{{amd|AM2966}} || Octal dynamic memory driver | | {{amd|AM2965}}<br />{{amd|AM2966}} || Octal dynamic memory driver | ||
|} | |} | ||
| − | |||
== 2nd sources == | == 2nd sources == | ||
The ''Am2900'' had a large number of 2nd sources: | The ''Am2900'' had a large number of 2nd sources: | ||
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* [[Thomson-CSF]] | * [[Thomson-CSF]] | ||
* [[Vitesse]], November 1985 | * [[Vitesse]], November 1985 | ||
| + | |||
| + | == Design == | ||
| + | The family includes two [[4-bit architecture|4-bit]] [[ALU]]s - ''2901'' and a ''2903''. The {{amd|AM2901}}/{{amd|AM2901A|A}} was the original chip designed, supporting 8 different basic operations. The {{amd|AM2903}}/{{amd|AM2903A|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. | ||
| + | |||
| + | {{empty section}} | ||
| + | |||
Revision as of 14:59, 31 October 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:
- Elektronika
- Fairchild
- Motorola, October 1975
- National
- NEC
- Raytheon, December 1975
- Signetics
- Thomson-CSF
- Vitesse, November 1985
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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