User`s manual

DIGITAL-LOGIC AG MPC40/A/B/C, MPC41 Manual V1.4C

7.5 Remote Control over COM Port

7.5.1 Requirements

Serial Null-Modem cable (only RX and TX)

Remote computer: Serial port address 3F8h

Host computer: Serial port COM1 or COM2, OS (Windows or MSDOS), floppy image file with MSDOS 6.22

or FREEDOS (eg. freedos2img which is located on the product CD or in the download area).

7.5.2 Limitation

OS on the Remote computer: MSDOS or FREEDOS

By enabling “remote floppy” support, all other floppy disks on the remote computer will be disabled.

7.5.3 Principles of Functionality

The main principles are based on the hooks of vectors INT10(video), INT13(disk) and INT16(keyboard) in a

special (DLINT) ROM extension, which redirects the command interrupt requests over the serial COM port to

the remote console running on another (host) computer under Windows or MSDOS.

During startup, DLINT ROM module try to initiate communication over COM port, if this initial communication

is unsuccessful, remote access feature will be disabled. If initial connection was successful, DLINT module

asks for supported options and initialize appropriated TSR vectors. Options, which are not enabled in remote

console will stay native on remote computer. Remote connection was successfully established, if in the left

upper corner appears a message “Press F1 for Setup”.

7.5.4 Bios settings on remote computer.

To enable remote COM port for remote control, press F2 at boot time to enter a BIOS setup.

Then enter “Advanced”, “Console Redirection” and set COM port parameters and required protocol parame-

ters.

Note1: It’s possible to use any terminal emulation software on the host side, which support PC ANSI or

VT100 protocol.

Note2: Remote floppy support is working under following conditions:

1. Remote console software is Digital-Logic Remote855.exe

2. Baud Rate is fixed

[115.2K]

3. Flow Control

[None]

4. Console connection: [Di-

rect]

5. Continue C.R. after POST [On]

6. Remote Floppy Support: [On]

(turn “On” this option set all other options automatically to the proper state.