Intel Allows Release of Full 4004 Chip-Set Details
Anne & Lynn Wheeler
Intel Allows Release of Full 4004 Chip-Set Details
http://hardware.slashdot.org/story/09/11/16/2020235/Intel-Allows-Release-of-Full-4004-Chip-Set-Details
from above:
For the 38th anniversary of Intel's groundbreaking 4004 microprocessor,
the company is allowing us to release new details of their historic
MCS-4 chip family announced on November 15, 1971. For the first time,
the complete set of schematics and artwork for the 4001 ROM, 4002 RAM,
4003 I/O Expander, and 4004 Microprocessor is available to teachers,
students, historians, and other non-commercial users.
... snip ...
--
40+yrs virtualization experience (since Jan68), online at home since Mar1970
dke...@hotmail.com
> Intel Allows Release of Full 4004 Chip-Set Detailshttp://hardware.slashdot.org/story/09/11/16/2020235/Intel-Allows-Rele...
>
> from above:
>
> For the 38th anniversary of Intel's groundbreaking 4004 microprocessor,
> the company is allowing us to release new details of their historic
> MCS-4 chip family announced on November 15, 1971. For the first time,
> the complete set of schematics and artwork for the 4001 ROM, 4002 RAM,
> 4003 I/O Expander, and 4004 Microprocessor is available to teachers,
> students, historians, and other non-commercial users.
>
> ... snip ...
>
> --
> 40+yrs virtualization experience (since Jan68), online at home since Mar1970
Hi
I new that the I/O used dynamic shift registers but didn't realize
that the 4002
used dynamic bit cells.
Also, the ROMs had a stack of as many as 15 transistors for the
arrays. If we
could do that today, life would be great. Speed just wasn't an issue
when
they had the multiplexed bus.
I know that listening to Faggin that he could have made it run faster
if they'd
given him enough pins to create a real complete bus. He said they were
only
allowed to use packages that were used for their RAM chips.
Multiplexing the
bus was the only option.
Dwight