TNS SC

TNS SC It was manufactured from 1985 by JZD AK Slušovice. The computer was inspired by or was successor to TNS ST. Hardware is based on U880D @ 2,5MHz.Operating systems running on the computer: TNS-DOS(TurboDOS),CP/M,COBRA.

Parts of this topic may be machine translated.

Cards

Modified CPU board made by "2N" (Na Nivá) TNS-CPU-NN-00 TNS-CPU-NN-01. The board differs from the TNS CPU-D mainly in the connection of bus drivers (MHB8286/MHB8287) and small decoding logic. In addition, there is a bootloader EPROM (2732) on the board, which is disconnected via an IO write to a so far unknown port.

In addition to CPU-NN, there is another mysterious CPU board that also carries a 2K BOOT ROM ("ZAVADEC 2K VER 0."), which supports booting from (F)LOPPY (W)INCHESTER (M)INIFLO, as well as (A)DRESY functions (S)KOK (D)UMP (R)ESET. Not sure what this board belongs to, the bootloader references IO ports that are not common on TNS SC/TNS GC/TNS MC/TNS MC/W.

Bootloader

S[0-3] - FDC3
D[0-3] - FDC3
Ex-EPROM
K[0-7];boot from ?? (Kx) (via APK on ports 24-27h) x = 0-7

On TNS-SC computers, bootloaders are reported as "D1>" or "D2>". The method of booting the operating system varies according to the recording density on the system diskette.

If it is a floppy disk with a single recording density, the system is booted by pressing the [S] key ( single ) and then pressing the key with the number of the disk unit in which the system diskette is inserted. For example, for drive 0, the key sequence is: [S] [0]

If it is a diskette with a double recording density, then the [D] key ( double ) is used instead of the [S] key. For

so disk drive 1 will be the key sequence: [D] [1]

On the TNS-SC/W, if the computer is not configured for automatic booting from a Winchester disk, the operating system is loaded similarly.

The TNS-SC(/W) computer can be equipped with 5 1/4" drives. In this case, it is possible to use the INT module from the TNS-MC computer and boot the operating system in the same way as on the TNS-MC.

Additional peripheral KDP 723

It was used to connect KDP 723

Cards

Computers derived from TNS SC

The following computers were inspired by or derived from TNS SC:

References

Back
Licensed under CC-BY-NC-SA. Last change: 2025-01-11 23:15:44
Small
Medium
Large