Motorola MVME2300 Series - Manual (Page 61)

ISA Local Resource Bus
http://www.motorola.com/computer/literature 1-37
1
Seven-Segment Display Register
Note This register is NOT USED on the MVME2300-series
boards.
This 16-bit register allows data to be sent to the 4-digit hexadecimal
diagnostic display. The register also allows the data to be read back
.
DIG3[3:0] Hexadecimal value of the most significant digit.
DIG2[3:0] Hexadecimal value of the third significant digit.
DIG1[3:0] Hexadecimal value of the second significant digit.
DIG0[3:0] Hexadecimal value of the least significant digit.
VME Registers
The registers listed in the table below provide the following functions for
the VMEbus interface:
❏ A software interrupt capability
❏ A location monitor function
❏ A geographical address status
For these registers to be accessible from the VMEbus, the Universe ASIC
must be programmed to map VMEbus Slave Image 0 into the appropriate
PCI I/O address range. Refer to the
VMEbus Slave Map section for
additional details.
REG 7-Segment Display Register - Offset $08C0
BIT
SD1
5
SD1
4
SD1
3
SD1
2
SD1
1
SD1
0
SD9 SD8 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0
FIELD DIG3[3:0] DIG2[3:0] DIG1[3:0] DIG0[3:0]
OPER R/W
RESET X X X X X X X X X X X X X X X X