T e c h n i c a l I n f o r m a t i o n
Jumper configurations
There are very few jumpers that will ever need changing, most of them have been factory set for your system and its needs, but for completeness, the details are given here.
Internal speaker operation
PL2 | Next to outer SIMM socket, default position link pins 4 |
| and 5 gives audio output to the internal speaker in mono. |
| Only to be removed in a system having internal stereo |
| speakers. |
Internal ‘audio’ modem
PL4 | Just along from the CD audio connection, default position |
| if no internal modem is fitted, link pins 3 and 4. Remove |
| only when fitting an internal modem supporting sound. |
BIOS reprogramme
These links are for special purposes. Only to be used for an official upgrade to the system BIOS. Do not move for any other reason.
PL5 | Next to PL2, normal link 2 and 3. This link is used in the |
| event of a disaster occurring during an upgrade to the |
| system BIOS. Link moved to pins 1 and 2 will enable the |
| system to be booted up from an internal backup of the |
| BIOS held in a secure area in the system ROM. |
PL6 | Normal link 2 and 3, move to pins 1 and 2 to enable |
| BIOS reprogramming (requires specialist software). |
Floppy disk control mode
PL13 Next to floppy disk ribbon connector, default position link pins 3 and 4. To enable