Motorola MVME1X7P manual VMEchip2 Board Status/Control Register, Isf, Rst

Models: MVME1X7P

1 316
Download 316 pages 46.44 Kb
Page 196
Image 196

2

VMEchip2

VMEchip2 Board Status/Control Register

ADR/SIZ

Local Bus: $FFF40104/VMEbus: $XXY2 (8 bits [5 used])

 

 

 

 

 

 

 

 

 

 

 

BIT

7

6

5

4

3

2

1

 

0

 

 

 

 

 

 

 

 

 

 

NAME

RST

ISF

BF

SCON

SYSFL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPER

S/R

R/W

R

R

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

0 PSL

0 PSL

1 PS

X

1 PSL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This register is the VMEchip2 board status/control register.

SYSFL

This bit is set when the VMEchip2 is driving the

 

SYSFAIL signal.

SCON

This bit is set if the VMEchip2 is system controller.

BF

When this bit is high, the Board Fail signal is active.

 

When this bit is low, the Board Fail signal is inactive.

 

When this bit is set, the VMEchip2 drives SYSFAIL if the

 

inhibit SYSFAIL bit is not set.

ISF

When this bit is set, the VMEchip2 is prevented from

 

driving the VMEbus SYSFAIL signal line. When this bit

 

is cleared, the VMEchip2 is allowed to drive the VMEbus

 

SYSFAIL signal line.

RST

This bit allows a VMEbus master to reset the local bus.

 

Refer to the note on local reset in the GCSR Programming

 

Model section, earlier in this chapter. When this bit is set,

 

a local bus reset is generated. This bit is cleared by the

 

local bus reset.

2-106

Computer Group Literature Center Web Site

Page 196
Image 196
Motorola MVME1X7P manual VMEchip2 Board Status/Control Register, Isf, Rst