On Tue, 25 Apr 2000 15:38:46 +0200, Laurens Holst wrote:
>> * two 16-bit timers
>Z180 has even got an entire RS232 interface built into it!!!
This is a good difference. I like the internal RS232 on
Z180. Mainly if it works on the speed Ademir told me... (-:
>> * MMU
>Don't know about that...
Memory Management Unit. Is what makes possible 1Mb on Z180.
The processor relocates the program automatically (calling the
proper segment).
>No. Then you could as well use the Z180, which is almost the same, and runs
>at a higher (clock) speed.
On this case, the difference on speed is HIGH, because, if the
data sent by him are not wrong, it's a RISC processor.
It will be 20MIPS against the aproximately 10.5MIPS of Z380
and 12MIPS of Z180. A good speed improvement on internal processing
that may result in a substancial speed gain, even using standard
DIMM rams (when using Z180 at 33Mhz Ademir was working with a 128Kb
main Memory Mapper composed by SRAMs - used on PC cache, 15ns of access
time) and a regular 4Mb Mapper at 60ns (which give us something as
14Mhz as fastest access). So, faster speed only on the SRAMs...
(ADVRAM uses SRAMs also...).
Abra�OS/2, Daniel Caetano ([EMAIL PROTECTED])
...!m.tag
OS/2 Sites: http://www.quasarbbs.com/daniel/
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Drawings: http://www.djgallery.tsx.org/
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