Dma Channels; Sources Of Reset; Table 2-3. Ibc Dma Channel Assignments - Motorola MVME2600 series Installation And Use Manual

DMA Channels

The PIB supports seven DMA channels. Channels 0 through 3 support
8-bit DMA devices. Channels 5 through 7 are dedicated to 16-bit DMA
devices. The channels are allocated as follows:

Table 2-3. IBC DMA Channel Assignments

IBC IBC
Priority Label
1 Channel 0
2 Channel 1
3 Channel 2
4 Channel 3
5 Channel 4
6 Channel 5
7 Channel 6
8 Channel 7

Sources of Reset

The MVME2603/2604 SBC has eight potential sources of reset:
1. Power-on reset
2.
3. Watchdog timer Reset function controlled by the SGS-Thomson
http://www.motorola.com/computer/literature
Controller
DMA1 Serial Port 3 Receiver (Z85230 Port A Rx)
Serial Port 3 Transmitter (Z85230 Port A
Tx)
Floppy Drive Controller
Parallel Port
DMA2 Not available — Cascaded from DMA1
Serial Port 4 Receiver (Z85230 Port B Rx)
Serial Port 4 Transmitter (Z85230 Port B
Tx)
Not Used
switch (resets the VMEbus when the MVME2603/2604 is
RESET
system controller)
MK48T559 timekeeper device (resets the VMEbus when the
MVME2603/2604 is system controller)
Programming Considerations
DMA Assignment
2
2-13