OT-DIY CPU's

From: lee courtney <charlesleecourtney_at_yahoo.com>
Date: Sun Aug 18 03:36:25 2002

> Hex what is that. OCTAL is the way to go!
> Ban all 8/16/32/64 bit computers ... Bring back
> 18/36 and 12/24 cpu's!
> A 18 bit PDP-11 would have been so nice!

Hey! Many 16-bit minicomputers use octal notation -
PDP11, HP1000. Just because your word size is a
multiple of 4 doesn't mean you can't still use octal.

Lee Courtney

--- Ben Franchuk <bfranchuk_at_jetnet.ab.ca> wrote:
> Peter C. Wallace wrote:
>
> > Our firmware is in assembler, the problem is what
> version of the
> > assembler, since the CPU may change daily... I do
> pretty well know the opcodes
> > in hex, ( I deliberately made add = AXXXXh, NOP =
> 0000h) but whenever I change
> > some bit field definition I forget what the
> machine code looks like anymore...
>
> Hex what is that. OCTAL is the way to go!
> Ban all 8/16/32/64 bit computers ... Bring back
> 18/36 and 12/24 cpu's!
> A 18 bit PDP-11 would have been so nice!
>
> > My CPU sort of looks like a pipelined 16 bit PIC
> so architecture wise
> > it dates from an on-topic time...
> >
> I designing a 12/24 bit cpu that is in the 1980-1985
> time frame.
> http://www.jetnet.ab.ca/users/bfranchuk/index.html
>
> We have a lot of 16 bit cpu's so what is the
> advantage of your design
> over others. 64K byte memory is the minumum useful
> memory for a computer.
> 12K operating system, 48K data & program space.
> While that is two chips
> nowdays for 32KB ram / 32 rom memory even for a
> controler that is limited memory.
>
>
>


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Received on Sun Aug 18 2002 - 03:36:25 BST

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