S36666WB%ETSUACAD.BITNET@ricevm1.rice.edu (Brian Wright) (10/16/90)
Hello,
As everyone has been so fond of telling me that the 68070 doesn't exist.
Well all I can say is 'DO YOUR HOMEWORK!!!'. The Signetics 68070 is *NOT* one
in the series of 68x00. It is rather a take off from the 68000 chip. It
Has a few extra I/O nick-nacks. As someone else has said, "It is a 68000 with
a serial port." So please be sure that you know what you are talking about
before mailing me and telling me it is a pipe dream or other such nonsense.
I thought this subject had been covered thoroughly on USENET.
If someone wants to throw their two-cents worth in about the 68070 please
feel free. If you have more detailed information about the chip don't
hesitate with that either as I don't have information in front of me at this
moment.
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||---Brian Wright | / / ||
||---s36666wb@etsuacad.etsu.edu | \ \/ / Only Amiga ||
||---Commercial Artist and Amigaphile| \/\/ Makes It Possible!! ||
=======================================================================slfields@uokmax.ecn.uoknor.edu (Scott L Fields) (10/16/90)
In article <33524@nigel.ee.udel.edu> S36666WB%ETSUACAD.BITNET@ricevm1.rice.edu (Brian Wright) writes: > As everyone has been so fond of telling me that the 68070 doesn't exist. >Well all I can say is 'DO YOUR HOMEWORK!!!'. The Signetics 68070 is *NOT* one >in the series of 68x00. It is rather a take off from the 68000 chip. It >Has a few extra I/O nick-nacks. As someone else has said, "It is a 68000 with >a serial port." So please be sure that you know what you are talking about >before mailing me and telling me it is a pipe dream or other such nonsense. >I thought this subject had been covered thoroughly on USENET. > If someone wants to throw their two-cents worth in about the 68070 please >feel free. If you have more detailed information about the chip don't >hesitate with that either as I don't have information in front of me at this >moment. Well, I have a couple of 68070's and know quite a bit about it. basically, take a 68000, add a MMU, a serial port, a I2C port {chip to chip serial interface}, 2 DMA channels, a timer, and glue logic and put in on one package and you got the Signetics 68070. They have version that go up to 15Mhz. It could have made a great Amiga CPU but for a few quirks. Not all the interupts lines are available. I believe you could get all but one of the interrupts outside the chip. Too bad there was no coproccesor support for the chip. Heck, what i wanted was almost exactly what the 68070 was. What I was wanting was a chip that was basically a 386sx version of the 68030 {32 bit chip on the inside but 16 bit access outside}. I also wanted 2 DMA channels and a serial interface similar or the same as the I2C interface. I keep hearing that Motorola was going to release a chip called the 68025 that would basically be a chip akin to the 386sx. Oh well.