Gregory's Server@kenshirriff I seem to remember that a 486 was basically a 386 and a 387 in a single package. Would they still have used this behind the scenes ?
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@kenshirriff I seem to remember that a 486 was basically a 386 and a 387 in a single package. Would they still have used this behind the scenes ? 1 comment
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@LuzrBum It's a bit complicated. For the 286, Intel abandoned the complicated request/grant scheme but kept HOLD/HLDA. More complex bus arbitration was moved to the 82289 bus controller chip.
The 486 is more than just a 386 and a 387 packaged together. As far as bus arbitration, the 486 has the HOLD/HLDA pins to control the bus, but added BREQ (bus request) and BOFF (backoff).