Beta Disk Interface is a disk interface for ZX Spectrum computers. It was developed by Technology Research Ltd (United Kingdom), in 1984 and released in 1985 with price £109.25 (or £249.75 with one disk drive). Beta 128 Disk Interface is a 1987 version supporting ZX Spectrum 128 machines (difference is in access points addresses). Beta disk interfaces were distributed with TR-DOS operating system in ROM, also attributed to Technology Research Ltd. Latest firmware version is 5.03 (1986). The interface was possibly based on WD1793 chip.
The interface handles single and double sided, 40 and 80 track double density floppy disks, up to 4 drives.
Read more about Beta Disk Interface: Clones, Operating Systems Support
Famous quotes containing the word disk:
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This maple burn itself away;
Unloved, the sun-flower, shining fair,
Ray round with flames her disk of seed,
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With summer spice the humming air;”
—Alfred Tennyson (1809–1892)