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 Inviato: 04 Apr 2011 12:43 Oggetto: 30 anni fa Osborne 1, il primo portatile |
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Commenti all'articolo 30 anni fa Osborne 1, il primo portatile
Aveva uno schermo da 5 pollici, due lettori di floppy e pesava quasi 11 kg.
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franz
Dio minore
Registrato: 25/05/05 16:12
Messaggi: 800
Residenza: Lac Majeur
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| Inviato: 04 Apr 2011 16:18 Oggetto: |
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beeeello, c'era anche un Pommodore 64 fatto così. Era lo SX
| Citazione: | Aside from its built-in features and different form factor, there were several other subtle differences between the SX-64 and the regular C64. The default screen color was changed to blue text on a white background for improved readability on the smaller screen. This sometimes caused compatibility problems with programs that assumed the C64's default blue background. (This was, however, often easily overcome by the user simply entering the appropriate BASIC POKE commands to change screen colors and keystroke to change the cursor color to mimic the C64's default colors prior to loading of the program.) The default device for load and save operations was changed to the floppy drive. In addition, the cassette port and RF port were omitted from the SX-64 because it had a built-in disk drive and monitor, and thus no need for a tape drive or television connector. However, the omission made it impossible to use a standard C64 Centronics parallel printer interface without modification, since these interfaces used a connector on the cassette port to get +5V for operation. There were also subtle differences in the cartridge port, both electrically and in regards to its physical placement on the board, which made compatibility with certain C64 cartridges spotty.
Like the power supply of the C64, the original SX-64's (built in) power supply limits the machine's expandability. Later units (from GA4 and on) used a larger power supply intended for the DX-64 (see below).
Compatibility with Commodore RAM Expansion Units varies. Early SX-64 power supplies cannot handle the extra power consumption from the REU. The physical placement of the cartridge port can prevent the REU from seating properly. The 1700 and 1750, 128K and 512K units intended for the C128, are said to work more reliably with the SX-64 than the 1764 unit that was intended for the regular C64. Some SX-64 owners modified Commodore REUs to use an external power supply in order to get around the power supply issues.
An enhanced version of the SX-64 with dual floppy drives, known as the DX-64, was announced and a few have been reported to exist, but it is very rare. Instead of an extra floppy drive, a modem could also be built in above the first drive. Some hobbyists installed a second floppy drive themselves in the SX-64's empty drive slot. A version with a monochrome screen called the SX-100 was announced but never released. |
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Freestyler
Semidio
Registrato: 12/05/06 12:04
Messaggi: 491
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| Inviato: 04 Apr 2011 23:45 Oggetto: |
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Che figata, è bellissimo!  |
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OXO
Dio maturo
Registrato: 10/05/05 17:30
Messaggi: 1942
Residenza: Scandicci
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| Inviato: 05 Apr 2011 15:47 Oggetto: |
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Mamma mia, fa quasi tenerezza, a leggere certe caratteristiche tecniche da brivido...  |
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utonto_medio
Dio maturo
Registrato: 09/02/08 14:28
Messaggi: 1012
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| Inviato: 05 Apr 2011 21:22 Oggetto: |
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| uhm... ma cosa poteva fare??? con 5 pollici di display poi... |
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utonto_medio
Dio maturo
Registrato: 09/02/08 14:28
Messaggi: 1012
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| Inviato: 05 Apr 2011 21:23 Oggetto: |
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| uhm... ma cosa poteva fare??? con 5 pollici di display poi... |
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Zeus
Amministratore
Registrato: 21/10/00 01:01
Messaggi: 12777
Residenza: San Junipero
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| Inviato: 06 Apr 2011 07:04 Oggetto: |
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Già, cosa si poteva fare senza hard disk e con soli 64 Kbyte di Ram?  Oggi perfino un telefonino ha più memoria... |
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{Helldiver}
Ospite
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| Inviato: 29 Set 2011 16:46 Oggetto: |
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| A onor del vero non era proprio un portatile, era un "trasportabile", nel senso che se non avevi una presa di corrente lì vicino non potevi utilizzarlo, in realtà il primo vero laptop fù l'Epson HX-20, annunciato nel 1981 ma entrato nella grande distribuzione solo 2 anni dopo; quello non necessitava di nessuna presa di corrente vicina e lo potevi tenere tranquillamente sulle ginocchia seduto su una panchina al parco, per esempio. |
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