Table of Contents
Advertisement
A24 Memory
Registers
64 Register Programming Information
In VXI specifications however, only two types of interrupts are defined;
RORA (Release on Register Access) and ROAK (Release on
Acknowledge). The HP E2251 Carrier converts M-Module Type A
interrupts to RORA and Types B and C interrupts to ROAK (default).
RORA Interrupts The interrupting device provides its logical address on
the data bus (D0 - D7) during the interrupt
acknowledge cycle that was initiated in response to its
interrupt request.. It does not remove the interrupt
request until its Status/Control register is accessed.
ROAK Interrupts The interrupting device removes the interrupt request
upon the presence of a properly addressed interrupt
acknowledge cycle and provides its logical address on
the data bus (D0 - D7). A cause/status byte is also
placed on the data bus (D15 - D8)
The HP E2261A has the following registers in A24 memory:
•
Status Register at address 00
•
Control Register at address 02
•
Interrupt Vector Register at address 04
•
Reserved addresses 06
•
Command / Response Register at address 20
•
Parameter Register 0 at address 22
•
Parameter Register 1 at address 24
•
Command Status Register at address 26
•
Interrupt Generator Register for Serial Port 1 at address 28
•
Interrupt Generator Register for Serial Port 2 at address 2A
•
Interrupt Generator Register for Serial Port 3 at address 2C
•
Interrupt Generator Register for Serial Port 4 at address 2E
•
Reserved addresses 30
•
FIFO Status Register at address 36
•
Interrupt Status/Control Register for Serial Port 1 at address 38
•
Interrupt Status/Control Register for Serial Port 2 at address 3A
•
Interrupt Status/Control Register for Serial Port 3 at address 3C
•
Interrupt Status/Control Register for Serial Port 4 at address 3E
•
Transmit/Receive Register for Serial Port 1 at address 40
•
Transmit/Receive Register for Serial Port 2 at address 42
•
Transmit/Receive Register for Serial Port 3 at address 44
•
Transmit/Receive Register for Serial Port 4 at address 46
h
h
h
- 1E
h
h
h
h
h
h
- 34
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
Advertisement
Table of Contents
