28-bit
From Wikipedia, the free encyclopedia
 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
| Processors | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1-bit | 4-bit | 8-bit | 12-bit | 16-bit | 18-bit | 24-bit | 31-bit | 32-bit | 36-bit | 48-bit | 60-bit | 64-bit | 128-bit |
| Applications | |||||||||||||
| 8-bit | 16-bit | 32-bit | 64-bit | ||||||||||
| Data sizes | |||||||||||||
| bit nibble octet byte | |||||||||||||
| halfword word dword qword | |||||||||||||
| IEEE floating-point standard | |||||||||||||
| Single precision floating-point format (32-bit) Double precision floating-point format (64-bit) Quadruple precision floating-point format (128-bit) | |||||||||||||
In computer architecture, 28-bit integers, memory addresses, or other data units are those that are at most 28 bits wide. Also, 28-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
The only significant 28-bit computer was the Norsk Data ND-505, which was essentially a 32-bit machine with six wires in its address bus removed. The reason for scaling down was to be able to sell it to Iron Curtain countries, avoiding the then CoCom embargo on 32-bit machines.
