| ??? 12/12/05 23:16 Read: times |
#105099 - NT - not quite Responding to: ???'s previous message |
Charles Bannister said:
The evolution of the inp and out function have been extended to visual basic. See this web site for a solution. http://www.logix4u.net/inpout32.htm This looks like a jolly useful utility for all those people wanting to control the PC Parallel port, directly-access the PC's UART registers, etc, from NT-based Windows versions (NT, 2000, XP,...) However, I don't think the description of the problem is quite right: Logix4u.net said:
Whenever the operating system find that a user mode program is trying to execute such instructions [IN, OUT] the operating system stops execution of those programs and will display an error message. The OS will not (necessarily) just crash the application: The application is actually running in a Virtual machine; so these IN and OUT instructions are "trapped", and handled by the OS in software. This is why so many such applications fail on NT-based systems - because this software emulation completely destroys the timing. Thus the problem is not (always) that IN and OUT simply cannot be used; rather, that they no longer directly access the hardware and therefore the timing is nothing like it was for direct access. |
| Topic | Author | Date |
| Add on card programming | 01/01/70 00:00 | |
| please clarify | 01/01/70 00:00 | |
| RE: please clarify | 01/01/70 00:00 | |
| (E)ISA addressing | 01/01/70 00:00 | |
| IOW and IOR | 01/01/70 00:00 | |
| not explicitly | 01/01/70 00:00 | |
| IRQ in EISA slot | 01/01/70 00:00 | |
| interrupt | 01/01/70 00:00 | |
| QBASIC programming | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| DIP Switch Address Setting in EISA card | 01/01/70 00:00 | |
| DIP switches... | 01/01/70 00:00 | |
| card design enclosed | 01/01/70 00:00 | |
| comparator | 01/01/70 00:00 | |
| QBASIC live and well. | 01/01/70 00:00 | |
| NT - not quite | 01/01/70 00:00 | |
| timing in Win? | 01/01/70 00:00 | |
| QBasic Lives!!! | 01/01/70 00:00 | |
| refer to 'Barry B Brey' | 01/01/70 00:00 | |
| EISA Bus interfacing | 01/01/70 00:00 | |
| beware if (E)ISA bus books | 01/01/70 00:00 | |
| Try this? | 01/01/70 00:00 | |
| Power resistor selection | 01/01/70 00:00 | |
| dont do it | 01/01/70 00:00 | |
| LM317 is an option | 01/01/70 00:00 | |
| Wasteful! | 01/01/70 00:00 | |
| if op can........... | 01/01/70 00:00 | |
| Power! | 01/01/70 00:00 | |
| basic Ohm's law | 01/01/70 00:00 | |
| Trouble shoot | 01/01/70 00:00 | |
| heating | 01/01/70 00:00 | |
| Reply : Heating | 01/01/70 00:00 | |
if you refer to D4 then | 01/01/70 00:00 |