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TransEra Modell 900 IEEE-488 Interface
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Card Defaults: |
Base Address |
2B8 |
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Interrupt |
5 |
The TransEra IEEE-488 interface cards were developed to give HTBasic full compatibility with the HP-IB interface found on Hewlett-Packard’s 9000 Series 200/300 Workstations.
General Setup
This section explains how to set up the I/O address, interrupt number and DMA channel number for the TransEra Model 900 card. Earlier parts of this chapter explained how to load the device driver required by HTBasic.
The TransEra IEEE-488 bus controller board includes the Texas Instruments 9914 IEEE-488 controller chip to provide complete hardware compatibility with an HP workstation’s HP-IB hardware.
The card is shipped with the options and jumpers already set for correct operation with HTBasic. If you have another board in your computer that uses interrupt 5 or I/O addresses in the range &H2A0 to &H2BF, you will need to change either the TransEra board or the other board so that the two no longer conflict. The following paragraphs explain how to change the default address, interrupt number or disable the System Controller status of the board.
I/O Address
The default I/O address for the Model 900 card is &H02B8. Addresses in the range &H02A0 to &H02BF are used. If these addresses conflict with other hardware installed in your computer, the address can be changed. It can be set to any address between &H0018 - &H03F8, in increments of &H20. The board uses 24 I/O addresses below and 8 above the specified address. This range is listed as the Address Range in the table below:
I/O Address Table
Chip
Switch Number
Address
Address
7
6
5
4
3
2
1
Range
18
on
on
on
on
on
on
on
000-01F
38
on
on
on
on
on
on
off
020-03F
58
on
on
on
on
on
off
on
040-05F
78
on
on
on
on
on
off
off
060-07F
98
on
on
on
on
off
on
on
080-09F
0B8
on
on
on
on
off
on
off
0A0-0BF
0D8
on
on
on
on
off
off
on
0C0-0DF
0F8
on
on
on
on
off
off
off
0E0-0FF
118
on
on
on
off
on
on
on
100-11F
138
on
on
on
off
on
on
off
120-13F
158
on
on
on
off
on
off
on
140-15F
178
on
on
on
off
on
off
off
160-17F
198
on
on
on
off
off
on
on
180-19F
1B8
on
on
on
off
off
on
off
1A0-1BF
1D8
on
on
on
off
off
off
on
1C0-1DF
1F8
on
on
on
off
off
off
off
1E0-1FF
218
on
on
off
on
on
on
on
200-21F
238
on
on
off
on
on
on
off
220-23F
258
on
on
off
on
on
off
on
240-25F
278
on
on
off
on
on
off
off
260-27F
298
on
on
off
on
off
on
on
280-29F
2B8
on
on
off
on
off
on
off
2A0-2BF
2D8
on
on
off
on
off
off
on
2C0-2DF
2F8
on
on
off
on
off
off
off
2E0-2FF
318
on
on
off
off
on
on
on
300-31F
338
on
on
off
off
on
on
off
320-33F
358
on
on
off
off
on
off
on
340-35F
378
on
on
off
off
on
off
off
360-37F
398
on
on
off
off
off
on
on
380-39F
3B8
on
on
off
off
off
on
off
3A0-3BF
3D8
on
on
off
off
off
off
on
3C0-3DF
3F8
on
on
off
off
off
off
off
3E0-3FF
If you change the I/O address, you must inform the software that uses the board. If you are using HTBasic, specify the new address in the LOAD BIN statement:
LOAD BIN "GPIB;BASE 3B8"
This statement corresponds to an I/O address of &H3B8 and the options should be set as follows:
Chip
Switch Number
Address
Address
7
6
5
4
3
2
1
Range
3B8
on
on
off
off
off
on
off
3A0-3BF
Interrupt and DMA Jumpers
The jumpers at J1 specify the I/O interrupt number used by the board, and should be set to 5. You may use another interrupt if it is not being used by another device. Move the jumper and inform the software using the board. If you are using HTBasic, you specify the interrupt in the LOAD BIN option. For example, to use interrupt 3, you would place the jumper on I3 and use the following LOAD BIN statement in your AUTOST file:
LOAD BIN "GPIB;INT 3"
DMA Channel
The jumpers at J2 specify the DMA request and acknowledge channels used by the board. If DMA is not used by the software driver, no jumpers should be placed on J2. This is the default. If DMA is used, the same channel should be used for both. Pick a channel that is not being used by another device. Generally, channels 1 and 3 are the only available channels. Put on the jumpers and inform the software driver. If you are using HTBasic, specify the DMA channel in the LOAD BIN statement with the DMA option. For example, to use DMA channel 1, place the jumpers on DR1 and DA1 and include the following option in your LOAD BIN statement:
LOAD BIN "GPIB;DMA 1"
System Controller
Switch 8 is used to enable or disable the System Controller capabilities of the board. If switch 8 is on, the board will act as system controller. When using the board with HTBasic, the switch setting specifies the default state, which is overridden with either the -SYSTEM or -NOTSYS driver options.
Only one system controller can be attached to the bus at a time. If you have another computer on the bus that will be the system controller, you may disable the system controller capabilities of the Model 900 card by setting switch 8 off. The card then defaults to a Talker/Listener device. If control is passed to the card, it can become the active controller.
Multiple GPIB Cards
Any combination of up to four GPIB interfaces may be active at one time. Each GPIB interface is associated with an Interface Select Code (ISC) by the LOAD BIN command. To use more than one GPIB interface, each interface must have a unique ISC, BASE address, and IRQ. Therefore, a separate LOAD BIN command is required for each interface. However, you cannot use the same driver file name in more than one LOAD BIN command.
To use more than one GPIB interface that use the same driver, you must load copies of the driver with altered names. Here is an example that uses one GPIB card with ISC 7 and a second card with ISC 8.
1. Go to the HTBasic directory. For example:
c: cd \HTBWIN
2. Make a copy of the GPIB driver. The copy can have any arbitrary base name, but must end with the .DW6 suffix. For example:
c:copy GPIB.DW6 GPIB2.DW6
3. Run HTBasic for Windows.
4. Load one driver for ISC 7. For example:
LOAD BIN "GPIB;ISC 7"
5. Load the driver for ISC 8. For example:
LOAD BIN "GPIB2; ISC 8"
Troubleshooting
"Error 167":
This is the most common error returned when using the LOAD BIN statement to load HTBasic drivers. Fortunately, the cause of the error is almost always the same: disagreement between driver parameters and actual card settings.
Nine times out of ten , when fielding this call, the answer is found in a discrepancy between the BASE and INT values loaded in the LOAD BIN statement, and the BASE and INT values setup on the card (jumper switches or software settings).
To properly deduce the source of " Error 167," check the following areas.
1· Determine the base address setting and interrupt setting on the card itself.
2· Make sure that these values agree with those specified in the LOAD BIN statement.
If the value of the jumper switches on the card were set to a base address of 2B8, and an interrupt of 5. You would need to assure that the LOAD BIN statement agrees. For example:
LOAD BIN "GPIB;BOARD BASE 2B8 INT 5"
3· Make sure that no other hardware devices in your computer are set to use this same interrupt.
(Note: On most new motherboards, Interrupt 2 is taken by the motherboard so do not use it. Other major culprits of conflicts are network and video cards)
IRQ conflict with Plug & Play
If your plug and play Windows is using the interrupt or base address you would like your Model 900 card to use, you must reserve these resources for the card from inside of Windows. To reserve resources, go to the System Control Panel, then get the properties of the Computer. Then, click on the Reserve Resources Tab. You may now add the resources that you want to assign to the Model 900 card. It is best to check the View Resources Tab first to find possible available resources. If you find available resources, you will not necessarily have to reserve them. Once these resources are reserved, other plug & play devices will find other available resources, leaving your Model 900 card's resources for you to assign from HTBasic. Note that Windows 9x will not recognize your Model 900 card, however, HTBasic will.
Windows NT4 / 2000 / XP Support available
Windows NT 4.0, Windows 2000 and Windows XP have a protective layer that prevents direct access to the hardware from a software program. This layer is called the Hardware Abstraction Layer. To access the hardware directly a Kernel layer driver must be provided. The GPIB driver that is shipped with HTBasic for accessing the Model 900 card from DOS, Windows 3.x and Windows 9x accesses the hardware directly with out the help of a Kernel layer driver. So, to access this card from NT4/2000/XP was necessary for TransEra to write a Kernel layer driver.
For HTBasic 9.x and higher this driver is called GPIB900 and is included in HTBasic.For older HTBasic versions another driver based on the Agilent SICL library is available from our ftp site:
TransEraIOConfigurationUtility.exe.
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