COM4N to COM4 Reversion Procedure: Difference between revisions
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If it is necessary to revert from the network option back to standard (non-network), the COM4N must be converted back to standard as well. The network option required shared interrupts and standard uses unique interrupts for each port. The non-network version of the hardware will not operate with shared interrupts.= Required Materials and Tools | If it is necessary to revert from the network option back to standard (non-network), the COM4N must be converted back to standard as well. The network option required shared interrupts and standard uses unique interrupts for each port. The non-network version of the hardware will not operate with shared interrupts. | ||
== Upgrade Parts Required | = Required Materials and Tools = | ||
== Upgrade Parts Required == | |||
*IRQ cable (3 connector, CBL-151-1124F)<br> | *IRQ cable (3 connector, CBL-151-1124F)<br> | ||
*“COM4” ejector tab<br> | *“COM4” ejector tab<br> | ||
== Tools/supplies Required | == Tools/supplies Required == | ||
*Flat blade screwdriver<br> | *Flat blade screwdriver<br> | ||
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= Procedure to Revert a COM4N Board from Shared Interrupts Back to Individual Interrupts = | |||
1. Remove all jumpers from J15, J16 and J17. | |||
2. Add the following jumpers. Refer to figure 1 for location: | |||
{| class="wikitable" style="border-collapse: collapse; width: 10%;" border="1px" cellpadding="2px" | |||
|- | |||
| style="width: 50%;" | J16 | |||
| style="width: 50%;" | 3-4 | |||
|- | |||
| style="width: 50%;" | J17 | |||
| style="width: 50%;" | | |||
1-2 | |||
3-7 | |||
|} | |||
3. The Hardware Watchdog MUST be enabled. Verify the jumper J18 is installed. | |||
4. Remove the COM4N ejector tab (held with press-pin) and replace with a COM4A tab or | |||
remove COM4N label. | |||
5. Replace 2-position IRQ cable, CBL-151-1124G, with 3-position IRQ cable, CBL-151-1124F.[[image:img1741309949314.png|500px|center|thumb|Figure 1: COM4A board ]] | |||
[[Category:Procedures]] | |||
Latest revision as of 18:26, 7 April 2025
If it is necessary to revert from the network option back to standard (non-network), the COM4N must be converted back to standard as well. The network option required shared interrupts and standard uses unique interrupts for each port. The non-network version of the hardware will not operate with shared interrupts.
Required Materials and Tools
Upgrade Parts Required
- IRQ cable (3 connector, CBL-151-1124F)
- “COM4” ejector tab
Tools/supplies Required
- Flat blade screwdriver
- Antistatic (ESD) wrist strap
- Wire-wrap tool
- 30ga wire-wrap wire
| NOTE | Non-network version of the hardware will not operate with shared interrupts. |
| Caution | Follow proper antistatic precautions when handling the boards. |
1. Remove all jumpers from J15, J16 and J17.
2. Add the following jumpers. Refer to figure 1 for location:
| J16 | 3-4 |
| J17 |
1-2 3-7 |
3. The Hardware Watchdog MUST be enabled. Verify the jumper J18 is installed.
4. Remove the COM4N ejector tab (held with press-pin) and replace with a COM4A tab or remove COM4N label.
5. Replace 2-position IRQ cable, CBL-151-1124G, with 3-position IRQ cable, CBL-151-1124F.
