Semiconductor & Computer Engineering
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A '''bit-slice microprocessor''' ('''BSM''') is a [[microprocessor]] designed as a module with the primary purpose of being able to assemble multiple identical such microprocessors to form a larger processor of some desired [[word size]]. Bit-slice microprocessors can be cascaded to produce any conventional (e.g. [[4-bit architecture|4-bit]], [[8-bit architecture|8-bit]], [[16-bit architecture|16-bit]]) as well as unconventional word sizes (e.g. [[10-bit architecture|10-bit]], [[12-bit architecture|12-bit]], [[16-bit architecture|16-bit]]). A notable advantage of a BSM over discrete logic components is the fact that most connections are internal to the chip with only few connections being external. | A '''bit-slice microprocessor''' ('''BSM''') is a [[microprocessor]] designed as a module with the primary purpose of being able to assemble multiple identical such microprocessors to form a larger processor of some desired [[word size]]. Bit-slice microprocessors can be cascaded to produce any conventional (e.g. [[4-bit architecture|4-bit]], [[8-bit architecture|8-bit]], [[16-bit architecture|16-bit]]) as well as unconventional word sizes (e.g. [[10-bit architecture|10-bit]], [[12-bit architecture|12-bit]], [[16-bit architecture|16-bit]]). A notable advantage of a BSM over discrete logic components is the fact that most connections are internal to the chip with only few connections being external. | ||
Revision as of 23:08, 5 February 2016
A bit-slice microprocessor (BSM) is a microprocessor designed as a module with the primary purpose of being able to assemble multiple identical such microprocessors to form a larger processor of some desired word size. Bit-slice microprocessors can be cascaded to produce any conventional (e.g. 4-bit, 8-bit, 16-bit) as well as unconventional word sizes (e.g. 10-bit, 12-bit, 16-bit). A notable advantage of a BSM over discrete logic components is the fact that most connections are internal to the chip with only few connections being external.
A departure from normal microprocessors is that fact that many bit-slice chips do not have an instruction set architecture. Such bit slicing systems allow designers to create their own architecture and other key characteristics such as I/O pins and address width. This flexibility of course came with overall more expensive system and larger amount of ICs.
bit-slice microprocessors
| Word size | Microprocessors | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Intel | National | AMD | MMI | TI | Fairchild | Motorola | RCA | ||
| 2-bit | 3000 | ||||||||
| 4-bit | IMP-4 | 2900 | 5700 | SBP0400 | 9400 4700 |
10800 | 74181 | ||
| 8-bit | IMP-8 | SN54AS888 SN74AS888 |
100K | EPIC | |||||
| 16-bit | IMP-16 | 29100 | |||||||
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