pppd at 76.8 kb/s on Sparc's onboard serial (zilog)

[CHAUMARAT_Gilles@stna.dgac.fr (CHAUMARAT Gilles)]

Is anybody running the hack to do 76.8 kb/s on the "old" (not ultra) sparc
 onboard serial ?

native pppd can't do it. I've added a #define B76800 0x10005 in
 /usr/include/bits/termios.h and rebuilt a pppd with support for it in
 speeds array in pppd/sys-linux.c:
#ifdef B76800
        { B76800, 76800 },
#endif

pppd builds fine. I checked the support for 76800 dumping speeds with gdb.

pppd does not say "76800 not supported" anymore but exits before/when 
 dialing with a "serial looped back." message.

Is it due to my modem not supporting 76800 with DTE ? The modem 
(DIAMOND SupraExpress 56e PRO) works fine at 115200 bps with
 a PC 16550A UART.

Any idea ?

Gilles Chaumarat