[sdiy] MSP430?

[ASSI]

On Sunday 23 November 2003 10:47, Jaroslaw Ziembicki wrote:
> - Assembler programming is very easy. It's a genuine RISC
> architecture. There are just few (23?) instructions, and
> they can be used with many addressing modes.

On a side-note, it is not a RISC, no matter what marketing would want 
you to believe. The number of instructions does not have much, if 
anything to do with a processor architecture being RISC. To quote from 
a famous article John Masjey used to post regularly to comp.arch:

[... sidenotes have been removed for brevity]
MOST RISCs:
- Have 1 size of instruction in an instruction stream
- And that size is 4 bytes
- Have a handful (1-4) addressing modes)
- Have NO indirect addressing in any form
- Have NO operations that combine load/store with arithmetic
- Have no more than 1 memory-addressed operand per instruction
- Do NOT support arbitrary alignment of data for loads/stores
- Use an MMU for a data address no more than once per instruction
- Have >=5 bits per integer register specifier
- Have >= 4 bits per FP register specifier 
[...]

> Some MSP family members have an additional high speed crystal
> oscillator on board. For MIDI applications you will need such a type.

The header board I'm eying has the clock quartz soldered on, and 
facilities for adding the high frequency quartz as well. Why would I 
absolutely need the second quartz for MIDI applications?


Achim.
-- 
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