Fitting an 80387 to XEN-S

See Also
IPB 4012 - IPB 4026 - IPB 4045 - IPB4085

Both on Venus I and Venus II XEN-S motherboards, the fitting of an 80387 co-processor involves both a daughter-board and a PAL chip.

If the PAL is NOT fitted, the co-processor will be seen by your application, but its functions will not be available, which will cause any number of failures. In AutoCAD 386 for example, it has been known to draw extra lines and hang intermittently.

The correct PAL is located in one of two places:-

• Venus I Motherboard - IC 96
• Venus II Motherboard - IC 73

The standard PAL fitted to the board is labelled VENC096C

This part needs to be exchanged for a PAL labelled VNPC096C

This chip may be sourced from Apricot Spares department quoting:-

• Part number: 12151931

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