Olympia BOSS

Technical detail about the Micral 80/60 / Olympia BOSS computers
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The Olympia Boss appears to be OEM’d by R2E (already bought by Bull by then), and used the product code Micral 80/60 as seen on the motherboard.

It shares many similarities with the Bull TTX-35 which seem to stem from the same internal project: same CPU, video chip, power supply etc.

Power Supply

Astec AA11500.

Specs:

  • Input voltage: 230V 1.2A or 115V 2.2A, 50 or 60Hz.
  • Output voltages:
    • 5V ??A
    • 12V ??A
    • -12V ??A
    • ??? ??A

Rifa caps:

Marking Brand Part Number Voltage Value Precision Type Length Width Pitch
C1 Rifa PME271M510 250V AC 0.01µF 20% X 18mm 5.5mm 15mm
C2 Rifa PME2712M622 250V AC 0.22µF X 24mm 11mm 20mm
C3 Rifa PME277MB422 250V AC 2200pF Y? 18mm 5.5mm 15mm
C4 Rifa PME277MB422 250V AC 2200pF Y? 18mm 5.5mm 15mm
C14 Rifa PHE280DA622 100V DC 0.22µF 10% 13mm 5mm 10mm
C16 Rifa PME271M510 250V AC 0.01µF X 18mm 5.5mm 15mm
C17 Rifa PHE261DA622 100V DC 0.22µF 20% 13mm 5mm 10mm
C36 Rifa PHE280DA622 100V DC 0.22µF 13mm 5mm 10mm
C37 Rifa PHE280DB668 100V DC 0.68µF 18mm 7mm 15mm
C38 Rifa PHE280DB668 100V DC 0.68µF 18mm 7mm 15mm
C39 Rifa PHE280DB668 100V DC 0.68µF 18mm 7mm 15mm
C40 Rifa PHE280DA622 100V DC 0.22µF 10% 13mm 5mm 10mm

C1, C2, C3, C4 and C16 (PME series) are cracked. Every other cap (PHE series) is silver-colored and in good shape.

Fuses:

  • F1: 250V 2.5A
  • F2: 250V 5A
  • F3: 250V 5A
  • F4: 32V 15A

Replacements:

Marking Quantity Voltage Value Class Part Number
C1, C16 2 250V AC 0.01µF X2 103MKP275KE
C2 1 250V AC 0.22µF X2 B32923H3224M
C3, C4 2 250V AC 2200pF Y B81123C1222M
C14, C17, C36, C40 4 100V DC 0.22µF - MKS4D032203C00KD00
C37, C38, C39 3 100V DC 0.68µF - MKP4D036804F00JSSD