Olivetti Prodest PC1, MSDOS, green phosphor monitor, resident diagnostic, startup kermata

Olivetti Prodest PC1

Read in: IT 🇮🇹   EN 🇺🇸

L'Olivetti Prodest PC1 è un personal computer con processore NEC V40 (compatibile con l'Intel 80188). E' stato prodotto, nel 1987-1988, dall'azienda italiana Olivetti.

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E' un computer dalle prestazioni un po' scarse, anche rispetto all'epoca di produzione, infatti era destinato al mercato home / educational.

Il sistema operativo è MSDOS. Relativamente ai supporti di archiviazione dei dati, l'Olivetti Prodest PC1 è dotato di uno (o due) lettori di floppy disk interni, da 3.5", 720KB. Può essere dotato anche di disco rigido che, però, il mio computer non ha.

Non cercavo questo computer, in particolare. Guardando le offerte su eBay (relative ai computer vintage, ovviamente!), ho visto questo computer corredato con il monitor a fosfori verdi 12 pollici, modello Olivetti MM 1202. L'ho acquistato subito! Infatti, ha una linea che mi piace molto.

Olivetti Prodest PC1, boot screen, boot screen, MSDOS, Microsoft MS-DOS version 3.20, 1987

Nel lotto acquistato, c'è anche il cavo video, per collegare il computer (che, posteriormente, ha un connettore tondo DIN) al monitor (che ha un connettore RCA).

Startup screen

The computer boots with Resident Diagnostics: These are ROM-resident diagnostic programs that verify that the computer is working properly. Diagnostic programs test the operation of: CPU (Nec V40), ROM, DMA, Interrupts, Timer, RAM, floppy disk drive, hard disk (if present).

After the initial self-test, the computer searches for a startup disk (floppy floppy disk or hard disk). If there is no boot disk, it prompts you to insert it and press a key.

The computer then starts with the Microsoft MS-DOS operating system version 3.20.

Olivetti Prodest PC1, boot screen, boot screen, resident diagnostic, boot strap, resident diagnostics 1987, CPU, DMA, RAM, Timer, Interrupts, Speed, Floppy, Fixed disk

Technical characteristics of the Olivetti Prodest PC1

CPU: NEC V40 (μPD70208), 16-bit, 4.77 MHz / 8 MHz software selectable

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ROM: 16 KB

RAM: 256KB / 512KB, expandable up to 640KB via bus, my computer has 512KB

Graphics: 8-pole DIN output for analog TV or monitor, DB9 output for CGA monitor

Text mode: 80 columns x 25 rows or 40 columns x 25 rows

Graphics mode: 640 x 200 pixels or 320 x 200 pixels

Audio: Built-in system speaker, audio output jack

Keyboard: QWERTY 83 keys, includes function keys and numeric keypad

Software supplied: Microsoft MS-DOS version 3.20

Supporti di archiviazione: n. 1 floppy disk drive interno, 3.5", 720 KB (il computer supporta fino n. 2 floppy disk drive interni e anche un hard disk)

Olivetti Prodest PC1, keyboard and rear ports, serial, parallel, audio, video, CGA

Expansion ports:

  • Audio Hi-Fi (jack che, quando inserito, esclude l'altoparlante di sistema)
  • Centronics
  • Serial (DB25)
  • Serial (DB9) for mouse
  • Monitor (n. 1 DIN 8 poles for TV or analog monitor, n. 1 CGA DB9)
  • Lateral expansion bus, 8-bit ISA type (but with some voltages and data missing), IBM compatible

On the lateral expansion bus (external) you can connect, through an expansion box or a Rist Card: floppy disk drive, RAM, LAN, modem, EGA, CD ROM, electronic adapter, Music Box, etc. ...

Dimensions and weight: 39 x 31 x 8 cm, 3.5 Kg

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Olivetti Prodest PC1, MSDOS 3.20, Ms-DOS, Olivetti Prodest PC1 specifications CPU: NEC V40 (μPD70208), 16 bit, 4.77 MHz / 8 MHz software selectable ROM: 16 KB RAM: 256 KB / 512 KB, expandable up to 640 KB via bus, my computer has 512 KB Graphics: DIN output for analog TV or monitor, DB9 output for CGA monitor Text mode:  80 columns x 25 rows or 40 columns x 25 rows Graphics mode: 640 x 200 pixels or 320 x 200 pixels Audio: built-in system speaker, audio output jack Keyboard: QWERTY 83 keys, includes function keys and numeric keypad Supplied software: Microsoft MS-DOS version 3.20 Storage media: n. 1 internal floppy disk drive,  3.5", 720 KB (the computer supports up to 2 internal floppy disk drives and also a hard disk) Expansion ports: Hi-Fi audio (jack that, when inserted, excludes the system speaker) Parallel (Centronics) Serial (DB25) Serial (DB9) for mouse Monitor (n. 1 DIN for TV or analog monitor, n. 1 CGA DB9) Expansion bus, IBM compatible,  for external floppy disk drive 5.25", 360 KB In addition to the external floppy disk drive, on the bus you can connect: RAM expansion, LAN, modem, EGA, CD ROM, Telematics adapter, Music Box.

Emulation

Il computer Olivetti Prodest PC1 si avvia con sistema operativo Microsoft MS-DOS. E' possibile emulare l'ambiente MS-DOS con DOSBox (sebbene DOSBox sia un emulatore per sistemi x86).

Power supply

The power supply of the Olivetti Prodest PC1 personal computer is internal. The mains power cable comes directly from the computer. My example is powered by 220 V alternating current 50 Hz and absorbs 35 W.

The Olivetti MM 1202 monitor is powered separately, always at 220 V in alternating current 50 Hz and draws 30 W.

Papers

1. Olivetti Prodest PC1, manuale d'uso (ITA)
2. Schema e foto del cavo video composito Olivetti Prodest PC1 -> Olivetti MM1202

Collection entry date: 14/03/2022

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