Egan Ford

All,

I updated http://asciiexpress.net/gameserver today. With Michael
Mahon's help I was able to speed up the 12kHz/6kHz 8000 bps HIFI to
12kHz/8kHz 9600 bps. I also fixed a big that effected some games that
loaded below $800. Lastly I removed the CRC code in favor of a faster
checksum + file length check.

If you find any problems please let me know before the end of the year
(before I go back to work).

Thanks.

David Schmidt

On 12/18/2011 8:47 PM, Egan Ford wrote:
> [...] Lastly I removed the CRC code in favor of a faster
> checksum + file length check.

I've been toying with ways to speed up the data stream of ADTPro... and
the CRC is one place I think changes can be made. What was your
checksum algorithm - and did you do it over the entire file, or for
segments of some size?

Egan Ford

On Dec 18, 7:54*pm, David Schmidt <schmi...@my-deja.com> wrote:
> On 12/18/2011 8:47 PM, Egan Ford wrote:
>
> > [...] *Lastly I removed the CRC code in favor of a faster
> > checksum + file length check.
>
> I've been toying with ways to speed up the data stream of ADTPro... and
> the CRC is one place I think changes can be made. *What was your
> checksum algorithm - and did you do it over the entire file, or for
> segments of some size?

EOR. Entire file. Start with 0xFF and EOR every byte as it is read
in. The new HIFI code has enough cycles when the sin wave is positive
to compute EOR checksum. The data stream should end with a
precomputed checksum so that when the checksum EORs the checksum you
get 0. That is the check. Before that, I check that then last byte
ends where expected. For audio traffic any disruption will always
change the length of the input. It'd be almost impossible to still
have the data end where it should. In that event, hopefully the
checksum will save me.

BLuRry

On Dec 18, 7:47*pm, Egan Ford <dataj...@gmail.com> wrote:
> All,
>
> I updatedhttp://asciiexpress.net/gameservertoday. *With Michael
> Mahon's help I was able to speed up the 12kHz/6kHz 8000 bps HIFI to
> 12kHz/8kHz 9600 bps. *I also fixed a big that effected some games that
> loaded below $800. *Lastly I removed the CRC code in favor of a faster
> checksum + file length check.
>
> If you find any problems please let me know before the end of the year
> (before I go back to work).
>
> Thanks.

Nice work!!! :-D

-B