| U2501 | Firmware Revision |
| 525-1445-01 | Pre-fcs |
| 525-1445-02 | Pre-fcs |
| 525-1445-03 | Pre-fcs |
| 525-1445-04 | Released by WO_09136 |
| 525-1445-05 | 1.7.0 iPOST 3.2.2 |
| 525-1445-06 | 1.7.0 iPOST 3.4.1 (adds FFB 501-3129 support) |
| 525-1445-07 | 1.8.0 iPOST 3.4.1 (fixes BugID 4011323) |
| 525-1445-08 | 1.8.1 iPOST 3.4.2 (fixes BugIDs 4011323 and 4024654) |
| 525-1445-09 | 1.8.3 iPOST 3.4.4 Older versions are compatible with AMD AM29F040 but are not compatible with SGS Thompson AM29F040. |
| 525-1445-10 | 1.8.3 iPOST 3.4.6 |
| 525-1445-11 | 1.8.3 iPOST 3.4.8 1998/10/27 |
| 525-1445-12 | 1.8.3 iPOST 3.4.8 1999/02/19 |
I/O Type 2 Graphics Board - 512K x 8
| U2501 | Firmware Revision |
| 525-1446-01 | Pre-fcs |
| 525-1446-02 | Pre-fcs |
| 525-1446-03 | Pre-fcs |
| 525-1446-04 | Released by WO_09136 |
| 525-1446-05 | 1.7.0 iPOST 3.2.2 |
| 525-1446-06 | 1.7.0 iPOST 3.4.1 (adds FFB 501-3129 support) |
| 525-1446-07 | 1.8.0 iPOST 3.4.1 (fixes BugID 4011323) |
| 525-1446-08 | 1.8.1 iPOST 3.4.2 (fixes BugIDs 4011323 and 4024654) |
| 525-1446-09 | 1.8.3 iPOST 3.4.4 Older versions are compatible with AMD AM29F040 but are not compatible with SGS Thompson AM29F040. |
| 525-1446-10 | 1.8.3 iPOST 3.4.6 |
| 525-1446-11 | 1.8.3 iPOST 3.4.8 1998/10/27 |
| 525-1446-12 | 1.8.3 iPOST 3.4.8 1999/02/19 |
| None | 1.8.22 iPOST 3.4.22 (Patch
103346-22 |
| 525-1446-13 | 1.8.23 iPOST 3.4.23 1999/10/01 |
PCI I/O Type 3 Board - 512K x 8
| U2501 | Firmware Revision |
| 525-1680-01 | 1.8.7 iPOST 3.0.2 |
| 525-1680-02 | 1.8.7 iPOST 3.0.3 |
| None | 1.8.22 iPOST 3.0.23 (Patch
103346-22 |
| 525-1680-03 | 1.8.23 iPOST 3.0.23 1999/10/01 |
I/O Type 4 Board - 512K x 8
| U2501 | Firmware Revision |
| 525-1757-01 | 1.8.6 iPOST 3.4.4 |
| 525-1757-02 | 1.8.7 iPOST unknown |
| 525-1757-03 | 1.8.7 iPOST 3.4.6 |
| 525-1757-04 | 1.8.7 iPOST 3.4.8 1998/10/27 |
| 525-1757-05 | 1.8.7 iPOST 3.4.8 1999/02/19 |
| None | 1.8.22 + iPOST 3.4.22 (Patch
103346-22 |
| 525-1757-06 | 1.8.23 iPOST 3.4.23 1999/10/01 |
I/O Graphics Type 5 Board - 512K x 8
| U2501 | Firmware Revision |
| 525-1760-01 | Unknown |
| 525-1760-02 | Unknown |
| 525-1760-03 | 1.8.7 iPOST 3.4.6 |
| 525-1760-04 | 1.8.7 iPOST 3.4.8 1998/10/27 |
| 525-1760-05 | 1.8.7 iPOST 3.4.8 1999/02/19 |
| None | 1.8.22 + iPOST 3.4.22 (Patch
103346-22 |
| 525-1760-06 | 1.8.23 iPOST 3.4.23 1999/10/01 |