Hello

[Philipp Rumpf]

On Tue, Oct 13, 1998 at 09:20:34PM +0200, Daniel Engstrom wrote:
> On 13 Oct, Stefan Reinauer wrote:
> > On Tue, 13 Oct 1998 daniel.engstrom at riksnett.no wrote:
> 
> Some boards have 4MBit (256k byte) flash these days... And IO though one
> could use compression. The gunzip object code in linux is 14k bytes and
> the kernel compresses about 2.5:1 which means that if we total 16k
> uncompressed code we have 112k left in the PROM. If we get 2.5x as well
> it will give 280k. If we only get 2x it will still be 224k binary code.
> 
> I am more worried about NVRAM space, the standard RTC only have 64 bytes
> of which 50 bytes are general purpose. Ofcuse most board have
Wrong. Most newer systems (i.e., those that have Flash ROMs, more or less)
have 128 bytes, of which 114 bytes are usable (one could think about abusing
the century and alarm fields, however). These bytes are accessible just like
normal CMOS is (out 0x70,index / in data,0x71).
And there are extensions or possibilities for extension on PS/2s and Compaqs
(they used to store the serial number there).

Philipp Rumpf
<prumpf at jcsbs.lanobis.de>