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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/olivetti-prodest-pc-128s.md

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+---
+title: Olivetti Prodest PC 128S
+categories:
+- Computers
+types:
+- Home Computer
+origins:
+- Italy
+years:
+- '1987'
+params:
+  name: Prodest PC 128S
+  image: /media/museum/photos/olivetti_pc128s_system_s1.jpg
+  company: /companies/olivetti
+  company_name: Olivetti
+  specs:
+  - label: NAME
+    value: Prodest PC 128S
+  - label: MANUFACTURER
+    value: Olivetti
+  - label: TYPE
+    value: Home Computer
+  - label: ORIGIN
+    value: Italy
+  - label: YEAR
+    value: '1987'
+  - label: BUILT IN LANGUAGE
+    value: BBC BASIC Version 4
+  - label: KEYBOARD
+    value: Full-stroke 93-key with 10 function keys and numeric keypad
+  - label: CPU
+    value: 65C12 - CMOS version of the 6502 with minor technical changes
+  - label: SPEED
+    value: 2 MHz
+  - label: RAM
+    value: 128 KB
+  - label: ROM
+    value: '64 KB - OS: 32 KB, BASIC: 16 KB, ADFS: 16 KB'
+  - label: TEXT MODES
+    value: 80 x 32/25 (2 colors) / 40 x 32/25 (2 or 4 colors) / 20 x 32 (16 colors) / 40 x 25 (Teletext display)
+  - label: GRAPHIC MODES
+    value: 640 x 256 (2 colors) / 320 x 256 (4 colors) / 160 x 256 (16 colors)
+  - label: COLORS
+    value: 16 (8 colors + flashing option)
+  - label: SOUND
+    value: 4 channels, 7 octaves
+  - label: SIZE / WEIGHT
+    value: |-
+      Keyboard unit: 42.5 (W) x 21.7 (D) x 7.7 (H) cm\
+      Expansion unit: 35.1 (W) x 33.3 (D) x 9.5 (H) cm
+  - label: I/O PORTS
+    value: RGB & Composite video out, RS232 (optional), Econet port (optional), Parallel printer, Disk-drive, Joystick/mouse, expansion edge connector
+  - label: BUILT IN MEDIA
+    value: 1 or 2 3.5'' 640 KB floppy-disk drives
+  - label: OS
+    value: ADFS
+  - label: POWER SUPPLY
+    value: Switching PSU in the expansion box
+  - label: PRICE
+    value: Unknown
+  tabs:
+  - photos
+  - links
+  photos:
+  - title: LARGE VIEW
+    subtitle: ''
+    text: ''
+    image: /media/museum/photos/olivetti_pc128s_system_s2.jpg
+  - title: TOP VIEW
+    subtitle: ''
+    text: ''
+    image: /media/museum/photos/olivetti_pc128s_topview_s1.jpg
+  - title: RUNNING SYSTEM
+    subtitle: ''
+    text: Welcome logo of the utility and programs diskette.
+    image: /media/museum/photos/olivetti_pc128s_bootscreen_s1.jpg
+  - title: MAIN UNIT
+    subtitle: ''
+    text: ''
+    image: /media/museum/photos/olivetti_pc128s_mainunit_s1.jpg
+  - title: LEFT & RIGHT SIDES
+    subtitle: ''
+    text: On the right side, the bus expansion connector.
+    image: /media/museum/photos/olivetti_pc128s_bothsides_s1.jpg
+  - title: OLIVETTI LOGOS
+    subtitle: ''
+    text: Nice Italian design.
+    image: /media/museum/photos/olivetti_pc128s_keyblogos_s1.jpg
+  - title: REAR SIDES
+    subtitle: ''
+    text: |-
+      Main unit, from left to right:\
+      • Expansion connector (right side)\
+      • RGB DIN socket\
+      • Composite video jack\
+      • locations for optional RS232 and Econet connectors\
+      • Joystick/mouse DB9 connector\
+      • Parallel printer connector\
+      • External floppy-disk drive DB25 connector\
+      • DC 5V input conector. Power is supplied by the expansion unit
+
+      Expansion unit\
+      • Male and female power plugs, fuses and power switch.\
+      • 5V power lead and disk interface flat cable, both are nornally connected to the main unit.
+    image: /media/museum/photos/olivetti_pc128s_rearside_s1.jpg
+  - title: MAINBOARD
+    subtitle: ''
+    text: |-
+      **(1)** Empty sockets for the optional RS232 interface\
+      **(2)** Connectors for the optional Econet card\
+      **(3)** SAA-5050 Teletext character generator (Mode 7)\
+      **(4)** Custom chip. Address decoder for various peripherals\
+      **(5)** 65SC12 microprocessor\
+      **(6)** Custom chip dedicated to ROM and RAM bank switching\
+      **(7)** 64 KB system ROM. Up to 4 additional ROMs can be added\
+      **(8)** 128 KB RAM chips (4x4464)\
+      **(9)** Custom chip in charge of the video RAM management\
+      **(10)** 6845 video chipset (First IBM PC monochrome and colour cards used the same chipset)\
+      **(11)** Custom chip used to manage the system's data bus\
+      **(12)** 6522 VIA chips (Versatile Interface Adapter) in charge of various I/O\
+      **(13)** Western Digital WD1772 floppy-disk controller
+    image: /media/museum/photos/olivetti_pc128s_inside_s1.jpg
+  - title: INSIDE THE EXPANSION MODULE
+    subtitle: ''
+    text: Sony double-sided, single density floppy-disk drive and switching PSU, also used for the main unit. Provision is made for a second 3.5" drive.
+    image: /media/museum/photos/olivetti_pc128s_insidefdunit_s1.jpg
+  - title: MANUALS
+    subtitle: ''
+    text: User manual, command summary cards for the 'Sheet' word processor, spreadsheet and database programs, Welcome diskette and even the warranty card :-)
+    image: /media/museum/photos/olivetti_pc128s_manuals_s1.jpg
+  - title: ORIGINAL BOXES
+    subtitle: ''
+    text: ''
+    image: /media/museum/photos/olivetti_pc128s_boxes_s1.jpg
+  links:
+  - title: PC128S Olivetti Prodest
+    url: http://pc128s.altervista.org/
+    text: Italian website dedicated to the PC128S Olivetti Prodest
+  comments:
+  - author: aotta (Italy)
+    date: Sunday 22nd July 2012
+    text: just an update... i repair my pc128s by replacing the via 6522, and attached to a lcd tv by modding the original rgb cable (that hadn''t the 5v wire attached!!!). Now i''m fully satisfied with my Olivetti Prodest!!!!
+  - author: aotta (italy)
+    date: Saturday 16th June 2012
+    text: |-
+      I (re)bought a pc128s a few days ago!\
+      i had to changed the floppy, and it worked... for few minutes! :(\
+      then it freezed and now it start with continuos beeeep and only break key working... :(\
+      and the monitor burned with lot of smoke after an half an hour it was on!\
+      what a pity, a 25 years old computer, used only for a bit!!!
+  - author: Cesare (Italy)
+    date: Sunday 29th April 2012
+    text: |-
+      The initially price of the PC128s is litalian lire 660.000 + IVA. about 342 euro + IVA (20$ tax).\
+      Bye
+  - author: PC128S
+    date: Wednesday 4th April 2012
+    text: Sito dedicato al computer PC128S Olivetti Prodest
+  - author: Daneel
+    date: Sunday 23rd October 2011
+    text: In the 1987 I''ve bought an Olivetti PC 128s win 14" colour monitor for 1.500.000 lire, about 775 euro.
+  oc_id: 1055
+  source:
+    url: https://web.archive.org/web/20230608072917/http://www.old-computers.com/museum/computer.asp?c=1055
+    date: '2023-06-08'
+---
+
+The Olivetti PC 128S was exactly the same machine as the Acorn [BBC Master compact](/museum/acorn-computer-bbc-master-compact/). It was sold only in Italy.
+
+Olivetti merely transformed the case design with nice blue and grey patterns and translated all the programs of the original Acorn Welcome disk, as well as the manual into Italian language.
+
+Although it was one of the most advanced 8-bit computer, the PC 128S, like its predecessor, the [PC 128](/museum/olivetti-prodest-pc-128/), didn't meet a large success, mainly because it came to late on the market, just at the time when the new Atari and Commodore 16-bit machines were launched in Europe.