Olympia Disque with IKBS¶

The Olympia Disque is an electronic daisywheel typwriter with single-line alphanumeric display, battery-buffered RAM and a proprietary 2" floppy disk drive.

It was possible to enable the Olympia Disque for Teletex, either with an internal add-on-board (IKBS) or with an external device.

Hardware¶

Mainboard¶

The mainboard hosts

• 1x NEC D8085AHC CPU (socketed)
• 4x TI TMS2764JL-35 EPROMs (IS1..IS4)
• 1x Fujitsu MBM27128-30 EEPROM (IS54 via daughterboard 73.410-4066.1)
• 5x HM6116LP-3 RAM (onboard)
• 4x HM6116P-3 RAM (socketed)
• 1x NEC D8253C-2 programmable timer IC (socketed)
• 2x NEC D8255AC-5 programmable peripheral IC
  • towards connector leading to daughterboard 73.200-4045.1/02L / 73.410-4044.2/00
  • towards connector X5
• various logic ICs (SN74LS245N, SN74LS02N, SN74LS393N, SN74LS04N, SN74LS138, TC40H032P, TC40HC002P
• Panasonic Lithium Battery BR-2/3A 3V

Left daughterboard (67.650-3242-2)¶

• 1x Mostek MK3870/42 MCU (socketed)
• 1x TMS2516JL-45 16k EPROM 2048x8 (socketed) TMS3516-45JL.pdf
• 2x 74LS259PC
• 1x 74LS373PC
• 1x ULN2003AN
• 1x LM339N
• 2x SN7404N
• 1x T74LS00BI
• 16x TIP112
• 2x TIP125
• 1x TIP127

Right daughterboard (73.200-4045.1/02L / 73.410-4044.2/00)¶

• 4x NEC D2732D 32k (4096 x 8) EPROM (socketed) D2732D.pdf
• 1x SN74LS373N
• 1x 8-way dip switch (all on in my unit)
• 1x unknown DIL28 IC (label on top turns marking unreadable)

IKBS board¶