COM4N to COM4 Reversion Procedure: Difference between revisions
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= Procedure to Revert a COM4N Board from Shared Interrupts | = Procedure to Revert a COM4N Board from Shared Interrupts Back to Individual Interrupts = | ||
Back to Individual Interrupts | |||
1. Remove all jumpers from J15, J16 and J17. | 1. Remove all jumpers from J15, J16 and J17. | ||
2. Add the following jumpers. Refer to figure 1 for location: | 2. Add the following jumpers. Refer to figure 1 for location: | ||
J16 3-4 | {| class="wikitable" style="border-collapse: collapse; width: 10%;" border="1px" cellpadding="2px" | ||
J17 1-2 | |- | ||
3- | | style="width: 50%;" | J16 | ||
3. The Hardware Watchdog MUST be enabled. Verify the jumper J18 is installed. | | 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 | 4. Remove the COM4N ejector tab (held with press-pin) and replace with a COM4A tab or | ||
remove COM4N label. | remove COM4N label. | ||
5. Replace 2-position IRQ cable, CBL-151-1124G, with 3-position IRQ cable, CBL-151- | 5. Replace 2-position IRQ cable, CBL-151-1124G, with 3-position IRQ cable, CBL-151- | ||
1124F. | 1124F.[[image:img1741309949314.png|500px|center|thumb|Figure 1: COM4A board ]] | ||
Revision as of 21:51, 6 March 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.
