Re: 65832 CPU??? Apple //f???

[dempson@actrix.gen.nz (David Empson)]

Bryan Parkoff <BParkoff@satx.rr.com> wrote:

> 65832 CPU???  Apple //f???
> 
>     I have seen many rumors that talk about 65832 CPU that supports 32 bits
> expanding up to 4GB while 65816 CPU that supports 16 bits expanding up to
> 16MB.  Is it true that WDC stopped doing their project to release 65832 CPU?

As far as I know, this product was never released.  It might not have
even got as far as a prototype, though the design was apparently done on
paper.

WDC were planning two variants of this CPU.

The 65832 was intended to be pin compatible with the 65816, so it could
be inserted into a machine which currently used a 65816.  It would have
had an 8-bit data bus and 24-bit address bus, just like the 65816, but
with improvements to the CPU architecture and instruction set.

The other variant was the 65032, which would have had a 32-bit address
bus and possibly a 32-bit data bus, with the same CPU core as the 65832.
This would have only been usable in a new motherboard design.

This "two variant" plan is the same as with the 16-bit versions: the
65802 was pin compatible with the 6502 and 65C02, with the same
addressing restrictions but an enhanced instruction set and CPU
architecture, while the 65816 increased the address space to 24 bits but
wasn't 100% pin compatible with the 8-bit series.  The '802 and '816
used the same CPU core with different bonding to external pins.

-- 
David Empson
dempson@actrix.gen.nz