Hi Anders, thanks for the info. -------- Original-Nachricht -------- > understood, the USB to RS232 adapter consists of at least two parts: > > * The RS232 emulating chip which can be a PL-2303, HL-340, Keyspan or some > other design. > > * A chip to convert voltage levels to TTL. If I understood correctly, the > USB port natively has -7V and +12V. The USB port has GND, +5V, Data- and Data+ (it's a differential, timeshared-bidirectional signal), and that's it. (USB3.0 is different, it has additional wires) So you have to create the RS232 voltages from the 5V. > Now, some adapters have a solution to both these factors. Some adapters > only emulate the RS232 signalling without bothering about signal levels. > Some implement the TTL levels with a special chip that limits transfer > speeds, while others don't. Sometimes an adapter that is known to work > can be changed without notice by the manufacturer, and you will buy a > different adapter than you thought you did. So maybe if mine does not work, but has a PL2303, it could be the voltage converter, or the transfer speed? The voltage I can probably measure, is there a way to adapt the transfer speed of the c2n232? > I ended up using a built-in serial port, for which the C2N232 works fine. > However I've had quite some issues running the cbmlink client software, > both on 3032, 4032, 8032 and VIC-20. So far the only machine on which the > cbmlink works reliably is the CBM-II line: 610 and 710, probabaly because > the cassette port isn't normally used by the Kernel in those. What problems do you have? I used cbmlink with the PC, but only occasionally for now, without problem. I'm using a 8296, using the "-m 8032-1" switch. > Actually I have a serial port EPROM programmer which I connected to my two My EPROM burner and my GALBLAST is for the LPT port, that the laptop still has, only the software is for windows only :-( Also the XILINX jtag cable works on the laptop's LPT port, but that runs on Linux too :-) AndrÃ© -- GMX DSL SOMMER-SPECIAL: Surf & Phone Flat 16.000 fÃ¼r nur 19,99 Â¿/mtl.!* http://portal.gmx.net/de/go/dsl Message was sent through the cbm-hackers mailing listReceived on 2010-08-07 10:00:37
Archive generated by hypermail 2.2.0.