Project PENTAGON-1024 SL — ZXNet «real.speccy»

From Andrey Romanenko To All 29 November 2004

Hi, Andrew!

AM> Let's just say that most devices connected via ISA “tolerate” lower
AM> exchange rates than are usually used in a PC. However, not all and not
AM> always. Problems can arise with video cards, network cards,
AM> SCSI controllers - with all equipment that has a limited size
AM> buffer RAM and high speeds of external data exchange, obliging the CPU
AM> to quickly fill or free this buffer.

This is complete nonsense said with a smart look. Even if there are such defective devices
then it is probably some kind of self-made product that is not healthy or an early Chinese defect.
A normal device works without any questions even on ISA 16bit with a processor
286 6Mhz.

Regards.

From Chunin Roman To All 29 November 2004

AR> This is complete nonsense said with a smart look. Even if there are such
AR> sub-devices, then this is probably some kind of unhealthy samoval or an early
AR> Chinese marriage. A normal device plows without any questions even
AR> on ISA 16bit with a percentage of 286 6Mhz.
Steep percentage, I saw the minimum 286 at 12MHz, and like a cool turbocharged one
at 16MHz :-)

I’ll tell you that, for example, Miro Sound MX1 does not work at a low speed (7 s
kopecks MHz) ISA, checked in the past on 486, which had 14 kopecks of quartz and there it was possible for the ISA to set different frequencies. And this is no longer a Chinese product, but an exemplary German product from Miro. It was a very high quality card. TB Tropezz, by the way, was also quite buggy.

But again, it’s not the ISA. But the fact is that the speck absolutely does not need it. If
there are any arguments in the opposite direction, i.e. Here is a stunning argument in favor of ISA, then we can consider it further. And just like that, an off-topic debate
began.

Let's talk about the spec after all!

With respect.

NedoPC group. Sprinter2k, ATM Turbo2+. http://chunin.infpres.com/

From Andrew V. Miheev To All 30 November 2004

I wrote that _most_ devices tolerate low communication speeds. But in the case of a 10 megabit network card, data from its cache must be taken out at a speed of at least 1.25 megabytes per second, and at the same time do not forget to send a confirmation packet for each received packet, and this is with the simplest protocols such as IPX/SPX. If you take something more complex like
TCP/IP, then you will get the same amount of overhead costs for assembling/disassembling
packets and putting them in software buffers/queues.

--
With respect, Andrey Mikheev.