droms@bknlvms.BITNET (02/15/88)
I recently added a DEQNA (M7504) module, etch b, rev a to an LSI 11/2 system. I'm trying to run Xinu V7. The DEQNA is exhibiting some strange behavior. When I run Xinu, the program terminates with an illegal instruction panic at the first access to the DEQNA I/O registers. I checked the machine code at the point the panic was generated, and it seems to be a perfectly valid MOV instruction, with one of the I/O registers as an operand. If I try to access the I/O registers through the LSI 11/2 microcode ODT, the processor goes into an unknown state in which it incorrectly echoes or ignores keyboard input, and I have to reboot the system. Anyone seen these symptoms before? Any advice or ideas would be greatly appreciated. - Ralph Droms Bucknell University droms@bknlvms.bitnet
comer@PURDUE.EDU (Douglas Comer) (02/15/88)
>>> I recently added a DEQNA (M7504) module, etch b, rev a to an LSI 11/2 >>> system. I'm trying to run Xinu V7. The DEQNA is exhibiting some strange >>> behavior. When I run Xinu, the program terminates with an illegal >>> instruction panic at the first access to the DEQNA I/O registers. I >>> checked the machine code at the point the panic was generated, and it >>> seems to be a perfectly valid MOV instruction, with one of the I/O >>> registers as an operand. If I try to access the I/O registers >>> through the LSI 11/2 microcode ODT, the processor goes into >>> an unknown state in which it incorrectly echoes or ignores keyboard >>> input, and I have to reboot the system. >>> >>> Anyone seen these symptoms before? Any advice or ideas would be >>> greatly appreciated. >>> >>> - Ralph Droms >>> Bucknell University >>> droms@bknlvms.bitnet We haven't ever seen that problem here. Doug