Semiconductor & Computer Engineering
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== bit-slice microprocessors== | == bit-slice microprocessors== | ||
{| class="wikitable" style="text-align: center;" | {| class="wikitable" style="text-align: center;" | ||
| − | ! [[Word size]] !! colspan=" | + | ! [[Word size]] !! colspan="9" | Microprocessors |
|- | |- | ||
| − | | || Intel || National || AMD || MMI || TI || Fairchild || Motorola || | + | | || Intel || National || AMD || MMI || TI || Fairchild || Motorola || RCA || |
|- | |- | ||
<!-- ======== 2-bit ======== --> | <!-- ======== 2-bit ======== --> | ||
| − | | | + | | {{arch|2}} |
|| {{intel|3000}} | || {{intel|3000}} | ||
| + | || | ||
|| | || | ||
|| | || | ||
| Line 21: | Line 22: | ||
|- | |- | ||
<!-- ======== 4-bit ======== --> | <!-- ======== 4-bit ======== --> | ||
| − | | | + | | {{arch|4}} |
|| | || | ||
|| {{national|IMP-4}} | || {{national|IMP-4}} | ||
| Line 29: | Line 30: | ||
|| {{fairchild|9400}}<br />{{fairchild|4700}} | || {{fairchild|9400}}<br />{{fairchild|4700}} | ||
|| {{motorola|10800}} | || {{motorola|10800}} | ||
| + | || | ||
|| {{74s|74181}} | || {{74s|74181}} | ||
|- | |- | ||
<!-- ======== 8-bit ======== --> | <!-- ======== 8-bit ======== --> | ||
| − | | | + | | {{arch|8}} |
|| | || | ||
|| {{national|IMP-8}} | || {{national|IMP-8}} | ||
| Line 40: | Line 42: | ||
|| {{fairchild|100K}} | || {{fairchild|100K}} | ||
|| | || | ||
| + | || {{rca|EPIC}} | ||
|| | || | ||
|- | |- | ||
<!-- ======== 16-bit ======== --> | <!-- ======== 16-bit ======== --> | ||
| − | | | + | | {{arch|16}} |
|| | || | ||
|| {{national|IMP-16}} | || {{national|IMP-16}} | ||
|| [[AMD 29100|29100]] | || [[AMD 29100|29100]] | ||
| + | || | ||
|| | || | ||
|| | || | ||
Revision as of 23:49, 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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