Retronetworking

h1. Olympia Disque with IKBS

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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.

{{thumbnail(olympia_disque.jpg, size=600)}}

h2. Hardware

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{{thumbnail(olympia_disque_back_connectors.jpg,size=500)}}

h3. Mainboard

The Mainboard comes assembled in a stack with two daughter boards:

{{thumbnail(olympia_disque_mainboard_stack.jpg,size=500)}}

The actual mainboard is the bottom board in the stack:

{{thumbnail(olympia_disque_mainboard_top.jpg,size=500)}}

{{thumbnail(olympia_disque_mainboard_bot.jpg,size=500)}}

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

h4. Connectors (labels added by myself)

|_.Designation|_.Pinout|_.Connects to|

|X1|1x4|Power supply|

|X2|1x3|Power supply|

|X3|1x13|Floppy Controller|

|X4|1x2|Pushbutton on rear panel near DB-15 X.21 connector|

|X5|1x16|Display (X22)|

|X18|2x10|Kayboard (X20) + LED/Pusbutton board (X19)|

h3. Left daughterboard (67.650-3242-2)

{{thumbnail(olympia_disque_left_dboard_bot.jpg,size=500)}}

This board seems to be in charge of driving the electromechanics (daisywheel, paper feed, carriage, ...)

* 1x Mostek MK3870/42 MCU (socketed)

* 1x TMS2516JL-45 16k EPROM 2048x8 (socketed) attachment:TMS3516-45JL.pdf

* 2x 74LS259PC

* 1x 74LS373PC

* 1x ULN2003AN

* 1x LM339N

* 2x SN7404N

* 1x T74LS00BI

* 16x TIP112

* 2x TIP125

* 1x TIP127

h4. Connectors (labels added by myself)

|_.Designation|_.Pinout|_.Connects to|

|X6|1x3||

|X7|1x9|Carriage belt drive step motor|

|X8|1x16|Paper feed step motor|

|X12|2z19|daisy-wheel/carriage|

h3. Right daughterboard (73.200-4045.1/02L / 73.410-4044.2/00)

{{thumbnail(olympia_disque_right_dboard_top.jpg,size=500)}}

{{thumbnail(olympia_disque_right_dboard_bot.jpg,size=500)}}

* 4x NEC D2732D 32k (4096 x 8) EPROM (socketed) attachment:D2732D.pdf

* 1x SN74LS373N

* 1x 8-way dip switch (all on in my unit)

* 1x unknown DIL28 IC (label on top turns marking unreadable)

h3. Display board (73.310-4029.1/05 / 73.410-4028.2/02)

{{thumbnail(olympia_disque_display_top.jpg,size=500)}}

{{thumbnail(olympia_disque_display_bot.jpg,size=500)}}

* 1x single-row 40 character alphanumeric VFD display tube

* 1x Toshiba TMP8085AP CPU (socketed)

* 1x NEC D2732D 32k (4096 x 8) EPROM (socketed) attachment:D2732D.pdf

* 1x RCA CDM6116AE2 RAM

* 1x unknown DIL40 IC (label on top turns marking unreadable)

* 10x UCN4810A VFD display driver

* 1x SN74LS373

* 1x TC40H000P

* 1x 74LS00

h3. Keyboard (73.410-3001-2/00)

{{thumbnail(olympia_disque_keyboard_top.jpg,size=500)}}

{{thumbnail(olympia_disque_keyboard_bot.jpg,size=500)}}

* 1x DM74LS154N

* 76x diode (for key matrix)

* 77x key switch (click)

* 1x 2x10 2.54mm header (bus cable connecting keyboard)

h3. Button and LED panel (73.410-4012.2/02)

* 1x MM5451N

* 8x Diode

* 28x LED 3mm green

* 7x pushbutton

* 1x 2x10 2.54mm header (bus cable connecting keyboard)

h3. Floppy

The floppy drive is a proprietary Olympia Mini-Disk (2" media cartridges with 8kBytes of storage).

{{thumbnail(olympia_disque_floppy_exterior.jpg, size=500)}}

{{thumbnail(olympia_disque_floppy_controller_top.jpg, size=500)}}

{{thumbnail(olympia_disque_floppy_controller_and_drive.jpg, size=500)}}

As you can see in the picture, the plastic part holding the drive motor has cracked and the motor has fallen out.

h3. IKBS board (63.400-6101.1 / ANT 66.3820.600.00-A001 SA-Ausg.B)

This is the internal extensions board turning the daisywheel typewriter into a Teletex device.

The board is the only one in the machine having shield covers, on both top and bottom side.

{{thumbnail(olympia_disque_ikbs_top_shield.jpg, size=500)}}

{{thumbnail(olympia_disque_ikbs_bot_shield.jpg, size=500)}}

The label may indicate it was actually built by ANT and not by Olympia?

{{thumbnail(olympia_disque_ikbs_label.jpg, size=500)}}

IF the shields are removed, the PCBA looks like this:

{{thumbnail(olympia_disque_ikbs_top.jpg, size=500)}}

{{thumbnail(olympia_disque_ikbs_bot.jpg, size=500)}}

* 1x SAB 8085 A-C CPU (socketed)

* 6x MBM2764-30 64k (8192 x 8) EPROM (IC1..IC6)

* 10x Toshiba TC5516AP RAM (socketed, 2x DIP24, 8x DIP28)

* 2x Intel D8251A UART

* 1x Intel D8255A-5

* 1x Intel D8273 HDLC/SDLC controler)

* various logic ICs (74HC00, 74LS03, 74LS00, 7400, 74LS04, 74LS02, 74LS74AN, 74LS32N, 74LS138N, 74LS374N, ...)

* 2x UA637ARC

* 1x 9638RC

* 1x Varta FL3/60DK 063 battery

h4. Connectors

|_.Designation|_.Pinout|_.Connects to|

|SV1|1x4|Power supply|

|SV2|1x14|SUB-D 15 (X.21 Interface)|

|SV3|1x3|Wires soldered to right daughterboard: GND, IS10, IS9). Maybe Chipselect?|

|SV4|1x4|3x Teletex LED panel (X23)|