Hi All,
I just pulled out my old USR Courier 56k v.everything X2 Modem! haha such a beast! claimed to be the worlds first software upgradable modem. I first had it @ 21k6 or 19k2 speed (I think) then upgraded it to 28k8 then 33k6 then 56k via software flashes.
Now just thinking back I remember on older pc's like my 386 and ami 500 that the serial ports couldnt handle above 28k8 I think. On the PC you had to have a 16550 UART serial port.
Does anyone know the max achievable baud rate with an analog modem on a A500 & A1200.
Just wanted to get better understanding of the technical issues that I had back then and if it really was possible B-)
Well, on a stock A500, you were limited by the CPU, and the serial.device (Driver), if you used the Commodore supplied Device, then you could not go over 19200 (From memory) without getting errors. But then you had replacement drivers that gave more speed for the basic CPU. (Like Baudbandit.device). I personally had A500 to A500 at 56k, but I am pretty sure there were devices that ran at 115k on a stock A500.
I used to run 115k Baud rate's to a 56k Device on a stock A500. (Helped with the little bit of Data Compression the modems used).
Now on a A1200, you have more CPU grunt, so less chances for Buffer Under/Overrun.
But these days, SERIAL is obsolete given Firewire/USB1/USB2.
