Boca Research 2x2, Turbo1x1 manual Troubleshooting

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SYMPTOM	POSSIBLE REMEDY
I am not sure how to	• In general, IRQ4 belongs to COM1.
set the IRQs.	IRQ3 belongs to COM2. COM3 and
	COM4 can be set to IRQ5-7, 10-12, or
	11-15. It is best to put an interrupt-
	driven device on COM1 or 2 (e.g., a
	mouse).
	• The IRQ settings in your software must
	match the settings in Windows 95
	Device Manager.
No response when	• Verify that the external device is
working at speeds	capable of those speeds.
exceeding 115Kbps.	• Make sure the board is set to high-
	speed mode with the J12 jumper.
The board will not	• Check the Windows 98/95 Device
work in high-speed	Manager and make sure the port is set
mode.	for high-speed by clicking “Boca IO
	Adapter” in Device Manager. These
	settings must not conflict with any
	other hardware.
Diagnostic programs	• The diagnostics program used must be
such as Checkit	capable of testing 650 UARTS. Most
report failures on	diagnostics programs can test only 450
serial ports or wrong	and 550 UARTs.
UART speed.

Troubleshooting