| Jumper | Pins | Function |
| W1 CMOS Clear | 1-2* Open |
Secure CMOS Power Remove jumper for 10 seconds and reinstall to clear CMOS |
|
J22 Clock Speed Select |
1-2 2-3 3-4 4-5 |
50 MHz CPU External Bus Frequency 40 MHz CPU External Bus Frequency 60 MHz CPU External Bus Frequency 66 MHz CPU External Bus Frequency |
| J28 Bus Speed Select |
2-4, 1-3 2-4, 3-5 4-6, 1-3 4-6, 3-5 |
2/3 × Internal CPU Frequency 1/2 × Internal CPU Frequency 1/3 × Internal CPU Frequency 2/5 × Internal CPU Frequency |
| * default setting | ||
| Function | Description | Designator |
| Keyboard | Miniature 6-Pin | J11 |
| Mouse | Miniature 6-Pin | J14 |
| Speaker/Headphone Out | Mini Stereo | J15 |
| Audio Line In | Mini Stereo | J17 |
| Microphone In | Mini Stereo | J24 |
| Parallel | DSUB 25-Pin | J25 |
| Video | 15-Pin Header | J27 |
| ROM | 3-Pin Header, Key 2 | J2 |
| External Battery | 4-Pin Header, Key 2 | J3 |
| Wavetable | 26-Pin Header, Key 13 | J4 |
| Modem Audio | 9-Pin Header, Key 2 | J5 |
| Serial | 9-Pin Header | J6 |
| Secondary Drive IDE | 40-Pin Header | J7 |
| MIDI/Joystick | DSUB 15-Pin 2 Row | J8 |
| Internal Line In (CD-ROM Audio) | 4-Pin Header, Key 2 | J10 |
| CD-ROM/Hard Drive IDE | 40-Pin Header | J9 |
| Diskette Drive | 34-Pin Header | J12 |
| MPEG Audio | 4-Pin Header, Key 2 | J13 |
| Riser Board | ISA Slot | J16 |
| SIMM Sockets | 72-Pin SIMM | J18, J19, J20, J21 |
| Clock Speed Select | 5-Pin Header | J22 |
| MPEG Board | 10-Pin Header | J26 |
| Bus Speed Select | 6-Pin Header | J28 |
| MPEG Board | 26-Pin Header | J32 |
| VGA Pass-through/Feature Connector | 26-Pin Header | J33 |
| LED | 5-Pin Keyed Header, Key 2 | J34 |
| CPU Type Selector | 3-Pin Header | JP5 |
| Cache | DIMM | U41 |