MIP405T Support

MIP405T Frequently Asked Questions

Manuals, Data Sheets, and Press Releases can be found in the MPL Documentation area of this homepage.

Question #340:

I observe power-up problems or sudden, unmotivated resets of the MIP board during normal operation. It seems to get worse if an additional add-on card is installed and/or the CPU and/or GPU load is increased.

Answer:

Chances are that this is a power supply problem. In contrast to the PIP boards, the MIP boards expect their 5V system input voltage to be provided in a "suitable, clean" form, especially relating to short power transients. Please check the following points:

make use there is a low impedance connection between the external power supply and the MIP board (wire length as short as possible / wire cross section as wide as possible).
supply 5.25V instead of 5V to the system.
use a better power supply.
solder the power supply wires directly to the pads of the power supply connector on the MIP board.

Question #329:	I have attached a PC/104 or PC/104-Plus card to the [PIP \| MIP] and i am sure that the card is configured correctly both from the hardware and the software side. Nevertheless the card does not work as expected, but shows erratic behaviour.
Answer:	Does the card need +12V, -12V or -5V from the PC104/PC104-Plus bus? If the answer is yes, chances are that the I/O drivers and/or some A/D or D/A circuitry are not properly powered. By default the [PIP \| MIP] does NOT provide the voltages mentioned above on the PC/104 or PC/104-Plus bus. Please check the corresponding "User Manual" and/or "Technical Reference Manual" for details.

Question #285:

Under Linux, i would like to use a card and/or driver using ISA interrupts, but it doesn't seem to work. Is there anything special about ISA interrupts?

Answer:

As the [PIP405 | MIP405 | MIP405T] supports more than 16 interrupt sources, the ISA interrupts are remapped to a non PC-like position as described in the table below:

PPC405 Interrupt Number	Usage
0 - 24	used by PPC405 internal devices
25	interrupt from PIIX4 (Master PIC)
26	interrupt from DUART ([PIP405 \| MIP405]) / unused (MIP405T)
27	external IRQ2
28 - 31	PCI INTA, INTB, INTC, INTD
32 - 47	standard PC ISA interrupts

So, if you want to use ISA IRQ5 for example, you have to request interrupt 37 (32 + 5) in your driver.