TOMS 720

## Description

Manufacturer: Toms
Year: 1991?

## Picture

<missing>

## Formats

    SSSD S 1x40x18x128

    SSED E 1x40x26x128

    SSDD D 1x40x18x256

    DSQD O 2x80x18x256

    DSDD Q 2x40x18x256

    SSID i 1x40x9x512

    DSID I 2x40x9x512

    DS?? C 2x80x9x512 - undocumented?

## Speeds

70kbps, compatible with Engl-Turbo-1050

## Commands

52 - Read sector
50 - Write sector
57 - Write sector with verify
53 - Get status
22 - Format ED
21 - Format
69 - ??? some kind of format
4E - Read PERCOM block
4F - Write PERCOM block
3F - Get high-speed index
23 - ???
24 - ???

## Hardware

8055 cpu running on 6MHz, 8155, 27256 os eprom, 6264 sram, twd2797 fdc, 8255 for Centronics. Four buttons, two digit display. One SIO port, one Centronics port. Memory map (0 KB TXT).

## Schematics

here (77 KB GIF), drawn by Jerzy Sobola.

## Misc

Has support for 3 other devices. D3: (romdisk), $40 (ramdisk?), $4D (printer). Can boot MyDos from romdisk with drive opened. Back (c) 1998-2004 Jindroush Last modified: Sun Jan 12 16:39:48 2003