"Device I/O," Error 57, Using SCREEN 3 and Communications Port (37405)
The information in this article applies to:
- Microsoft QuickBASIC 4.0
- Microsoft QuickBASIC 4.0b
- Microsoft QuickBASIC 4.5
- Microsoft BASIC Compiler for MS-DOS and OS/2 6.0
- Microsoft BASIC Compiler for MS-DOS and OS/2 6.0b
This article was previously published under Q37405 SYMPTOMS
Programs that use both Hercules SCREEN 3 and the communication port
("COM1:" or "COM2:") may generate "Device I/O" errors (error 57). For
example, one customer reported that the faster he drew to the Hercules
graphics screen, the more frequently he got the "Device I/O" error.
The same program will run correctly if a CGA, EGA, or VGA card is
used. It will also work correctly if text mode is used (screen 0).
STATUS
Microsoft has confirmed this to be a bug in Microsoft QuickBasic Versions
4.00, 4.00b, 4.50 and Microsoft Basic Compiler 6.00 and 6.00B (buglist6.00,
buglist6.00b) for MS-DOS. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.
| Modification Type: | Minor | Last Reviewed: | 1/9/2003 |
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| Keywords: | KB37405 |
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