| ??? 05/07/08 17:01 Read: times |
#154545 - one of the gotchas of the LPT-port gadgets is... Responding to: ???'s previous message |
... the cable.
There are crosstalks between lines in even a moderately long cable (1m). Also, not always have the cables enough return (a.k.a. ground) wires, and if they do, the gadgets tend not to have connected all the ground pins of the connector. Another gotcha is the poorly defined levels and output impedance of the LPT port. The third gotcha are the ever-present ground loops. JW |
| Topic | Author | Date |
| software problems with DL2TM programmer | 01/01/70 00:00 | |
| that\'s the crux | 01/01/70 00:00 | |
| reading works barely - writing not a bit | 01/01/70 00:00 | |
| one of the gotchas of the LPT-port gadgets is... | 01/01/70 00:00 | |
| a few successful transactions | 01/01/70 00:00 | |
| wrong shift register used ... | 01/01/70 00:00 | |
you have no idea | 01/01/70 00:00 | |
| get DOS | 01/01/70 00:00 | |
| making progress with IC-prog | 01/01/70 00:00 | |
| no improvement - cable is ok | 01/01/70 00:00 |