|Hardware Feature #28|
|Beta+ Disk Interface||Technology Research||�109.25 (+drive)|
Beta+ Disk Interface
The following advert was taken from Sinclair User January 1985
Spectrum Disk Interface. . . The Ultimate For The Spectrum Owner.
Spectrum owners ! Now you
can upgrade your machine to take full advantage of the sheer speed and convenience of
floppy disk operating.
Upgrade now with this low cost Beta disk interface from Technology Research that uses only 128 bytes of Spectrum memory and gives you instant operating cabability with any disk drive that the BBC micro uses.
Each interface comes complete with a 5.25inch disk with utility programs already loaded. From the word go you can transfer the contents of one disk to another or make copies of individual programs or data to any other disk. There will be no problems with your upgrade to disk operation as the LOAD and SAVE commands work equally well with cassette or microdrive.
EPROM disk operating system for ease of
The following review was taken from Sinclair User January 1985
Since we last reviewed the Beta disk
system, it has undergone a number of improvements and is now the best selling interface on
the market. It will accept 5.25 and 3inch drives in both 40 or 80 track format. Up to four
drives can be attached, but each must have its own power supply that can cost around
�30.00. The most popular 5.25 disks cost between �1.75 and �3.00 each. The amount of
information they can hold will vary according to the drive used. The Beat divides each
track into 16 sectors of 256 bytes per sector, so a 40 track disk gives 156k of storage.
(alowing 1 track for the directoy) The speed again will vary, all drives spin at 300 rpm,
five revolutions per second - but the time it takes to move from track to track will vary.
The Beta takes between 6 and 48ms, this can be slower, as the interface allows a second
delay for older belt-driven drives to spin up.
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