83Plus:Software:usb8x/Error Codes

Error codes may be returned via both the [[../Asm_Interface|assembly language interface]] and the [[../BASIC_Interface|BASIC interface]]. In the BASIC interface, the error code is returned in the first element of the return list. In the assembly language interface, an error is generally indicated by a return with the carry flag set. The error code can then be read from an offset of offErrorCode from the start of the usb8x driver buffer. There may be an additional error code located at offErrorCode+1. Error code equates are located in usb8x.inc.

Error Codes

Error #	Name	Info
0	OK	No error occured
1	Port82	An error occured while waiting for a value from port 82. This generally happens during initialization.
2	Port91Bit2	An error condition was detected via port 91 (NAK?)
3	Port91Bit4	An error condition was detected via port 91 (Stall?)
4	Port4C	Port 4C did not hold the expected value. This generally happens during initialization.
5	Port4D	Port 4D did not hold the expected value. This generally happens during initialization.
6	Port3A	Port 3A did not hold the expected value. This generally happens during initialization.
7	Port81	Port 81 did not hold the expected value. This generally happens during initialization.
8	Port8C	The frame counter did not start. This indicates a problem during initialization.
9	Port8F	Port 8F did not hold the expected value. This generally happens during initialization.
10	EPIndex	A non existant entry point was called. Be sure to check for the minimum required version of usb8x before calling entry points.
11	EPGetDes	An unsupported descriptor was requested from [[../Asm_Interface/ReadDescriptor|ReadDescriptor]].
12	NoDevice	No Device is connected.
13	FindDescriptor	An error occured in [[../Asm_Interface/FindDescriptor|FindDescriptor]].
14	BadClass	The attached device does not have the required class. (i.e. a keyboard is connected when [[../Asm_Interface/MouseInit|MouseInit]] is called).
15	Timeout	A timeout occured while waiting for data. This currently is only returned by [[../BASIC_Interface/MouseDo|MouseDo]].
16	BadID	The attached device does not have the required vendor or device ID.
17	ReadDescriptor	An error occured in [[../Asm_Interface/ReadDescriptor|ReadDescriptor]]. Check sub error code for additional information.
18	Init	An error occured during initialization. Check sub error code for more information.
19	AutoSetup	An error occured during [[../Asm_Interface/AutoSetup|AutoSetup]]. Check sub error code for more information.
20	Demo	An error occured in demo code. This should not be returned via either of the programming interfaces.
21	FindPipe	An error occured in [[../Asm_Interface/FindPipe|FindPipe]]. This error may occasionally improperly be listed a sub error code, because AutoSetup generates a FindPipe error during normal operation.
22	Stub	Returned by stub routines (not current used).
23	GetMaxPacketSize	An error occured while trying to determine the maximum supported packet size.
24	SetAddress	An error occured while trying to set the device address

Be aware that the error codes listed on this page are in decimal, while the error codes displayed in USBInfo are in hexadecimal.