19 Jun
2007
19 Jun
'07
8:25 a.m.
Also, these are truly microcoded. These usually have
there own microcode
ROMs and can have any number of bits wide to run them. Often when used
for hardware control ( such as disk drive controllers ) many of the bits
in the micro code directly control I/O functions so that the processor part
could be doing something with data at the same time the I/O was doing
something else.
You can control bitslice chips without microcode. The instruction
decoder of the processor can be a hardwired control system that feeds
control signals to the bitslices. This was sometimes done with the ECL
bitslices, as too much time is wasted in microcode.
--
Will