RS232 kártya PCI slotba 16C650 vezérlővel (fifo mod)

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Sziasztok,

PCI sínbe illeszkedő RS232 port bővítő kártyát keresek.

Lényeges az hogy ne a standard 16C550 vagy azzal kompatibilis USART vezérlő legyen rajta hanem 16C650-950.

16C650 lenne a legjobb! Ha van több egyforma az még jobb.

Köszönöm
A.

  • 401 megtekintés

( locsemege v | 2019. 06. 22., szo – 13:26 )

Nem tudok segíteni, nincs ilyenem, csak kíváncsi vagyok. Mi a különbség a kontrollerek között, mi az a feature, amelyre szükséged van?

tr '[:lower:]' '[:upper:]' <<<locsemege
LOCSEMEGE

"There is some confusion regarding 16550. Early models had a bug and worked properly only as 16450's (no FIFO). Later models with the bug fixed were named 16550A but many manufacturers did not accept the name change and continued calling it a 16550. Most all 16550's in use today are like 16550A's. Linux will report it as being a 16550A even though your hardware manual (or a label note) says it's a 16550."
Forras: https://www.pccompci.com/uarts.html

A helyzet még ennél is kuszább :)

According to another source, the FIFO issue was corrected only in the 16550AF model, with the A model still being buggy. (The C and CF models are okay too, according to this source.) The 16550AFN model added DMA transfers.
https://en.wikipedia.org/wiki/16550_UART

Van olyan forrás is, ami szerint a 16650-esek korai változataiban is hibás a FIFO:
16650: This UART was introduced by Startech Semiconductor which is now owned by Exar Corporation and is not related to Startech.com. Early versions have a broken FIFO buffer and therefore cannot safely run any faster than the 16450 UART.[12] Versions of this UART that were not broken have 32-character FIFO buffers and could function at standard serial port speeds up to 230.4 kbit/s if the operating system has a 1 millisecond interrupt latency. Current versions of this UART by Exar claim to be able to handle up to 1.5 Mbit/s. This UART introduces the Auto-RTS and Auto-CTS features in which the RTS# signal is controlled by the UART to signal the external device to stop transmitting when the UART's buffer is full to or beyond a user-set trigger point and to stop transmitting to the device when the device drives the CTS# signal high (logic 0).
https://en.wikipedia.org/wiki/Universal_asynchronous_receiver-transmitt…

A puding próbája az evés :)

( zuhi_ v | 2019. 06. 24., h – 05:51 )

Valami ilyesmi kacatok nekem is vannak...