Οι δισκέτες στο πέρασμα των χρόνων...

Να προσθέσουμε και την δισκέτα των 3'', που είναι γνωστή σε μας από τον Amstrad CPC 6128 κυρίως και λιγότερο από τον Spectrum +3:



και μια ματιά στα drive:


Από αριστερά το drive 8", στην μέση το drive των 5'' 1/4 και στα δεξια των 3,5''

Σωστά.....τις ξέχασα magicknight74 σωστός!!!

Αυτές οι δισκέτες αναπτύχθηκαν απο την Amstrad ? Για πιο λόγο να πάει με ένα τέτοιο ασυνήθιστο format ???

Έλα ντε ήθελε να πρωτοτυπήσει η Amstrad..Μην ξεχνάμε πως οι υπολογιστές τις πουλιόταν υποχρεωτικά με μόνιτορ!!!!

kravorzlair έγραψε:Αυτές οι δισκέτες αναπτύχθηκαν απο την Amstrad ? Για πιο λόγο να πάει με ένα τέτοιο ασυνήθιστο format ???

"The original concept of the 3-inch hard case floppy disk was developed in 1973 by Marcell Jánosi, a Hungarian inventor of Budapest Radiotechnic Company (Budapesti Rádiótechnikai Gyár - BRG). The system was the BRG MCD-1, which was patented but later the patent was not extended, therefore the protection was lost and Amdek released the AmDisk-3 Micro-Floppy-disk cartridge system in December 1982. It was designed for use with the Apple II Disk II interface card, but has also been successfully connected to other computers.

The drive itself was manufactured by Hitachi, Matsushita and Maxell. Only Teac outside this "network" is known to have produced drives. Similarly, only three manufacturers of media (Maxell, Matsushita and Tatung) are known (sometimes also branded Yamaha, Amsoft, Panasonic, Tandy, Godexco and Dixons), but "no-name" disks with questionable quality have been seen in circulation.

Amstrad included a 3-inch single-sided, double-density (180 KB) drive in their CPC and some models of PCW. The PCW-8512 included a double-sided, quad density (720 KB) as the second drive and later models, such as the PCW-9512 used quad density even for the first drive. The single-sided double density (180 KB) drive was "inherited" by the ZX Spectrum +3 computer after Amstrad bought the rights from Sinclair.

While all 3-inch media were double-sided in nature, single-sided drive owners were able to flip the disk over to use the other side. The sides were termed "A" and "B" and were completely independent, but single-sided drive units could only access the upper side at one time.
The disk format itself had no more capacity than the more popular (and cheaper) 5¼-inch floppies. Each side of a double-density disk held 180 KB for a total of 360 KB per disk, and 720 KB for quad-density disks. Unlike 5¼-inch or 3½-inch disks, the 3-inch disks were designed to be reversible and sported two independent write-protect switches. It was also more reliable thanks to its hard casing.
3-inch drives were also used on a number of exotic and obscure CP/M systems such as the Tatung Einstein and occasionally on MSX systems in some regions. Other computers to have used this format are the more unknown Gavilan Mobile Computer and Matsushita's National Mybrain 3000. The Yamaha MDR-1 also used 3-inch drives.

The main problems with this format was the high price, due to the quite elaborate and complex case mechanisms. However, the tip on the weight was when Sony in 1984 convinced Apple Computer to use the 3½-inch drives in the Macintosh 128K model, effectively making the 3½-inch drive a de-facto standard."

akmakas έγραψε:Έλα ντε ήθελε να πρωτοτυπήσει η Amstrad..Μην ξεχνάμε πως οι υπολογιστές τις πουλιόταν υποχρεωτικά με μόνιτορ!!!!

Εχω 2 τετοια Amstrad με την πράσινη οθόνη που εχει πανω 2 floppy drives (512Κ νομιζω λενε ?) ,αξίζουν τίποτα? τα εχει ο πατερας μου παραπεταμενα σε μια αποθηκη..

3-Inch media και άντε τρέχα να τα βρείς αμα μπορείς

Anemos έγραψε:Εχω 2 τετοια Amstrad με την πράσινη οθόνη που εχει πανω 2 floppy drives (512Κ νομιζω λενε ?) ,αξίζουν τίποτα? τα εχει ο πατερας μου παραπεταμενα σε μια αποθηκη..

ακόμα εκεί είσαι?

Anemos έγραψε:Εχω 2 τετοια Amstrad με την πράσινη οθόνη που εχει πανω 2 floppy drives (512Κ νομιζω λενε ?) ,αξίζουν τίποτα? τα εχει ο πατερας μου παραπεταμενα σε μια αποθηκη..

Είναι τα amstrad PCW, η μητρική είναι μέσα στην οθόνη, θέλω ένα...
(Σοβαρά μιλάω αν υπάρχει και πληκτρολόγιο!)



Δείτε και εδώ που έχω από τον Μάρτιο:
http://www.silogomania.com/forum-f18/topic-t352.htm