cnrdean@ucbtopaz.CC.Berkeley.ARPA (04/25/85)
I think I know the answers, but ... I am used to using an XT. We want to use an AT remotely, using a standard terminal (like a Televideo 925). 0. Do I have to buy any special hardware to hook a terminal into the AT? Or, can I just plug it in? 1. Will I have the same problem (as I do on the XT) with programs that always write to the monitor, and not out the serial port? Specifically, I am most interested in using symphony. 2. Any other useful advice? Thanks. Sam Scalise
kevinp@mmintl.UUCP (Kevin Piette) (04/30/85)
>I am used to using an XT. We want to use an AT remotely, using a standard >terminal (like a Televideo 925). > >0. Do I have to buy any special hardware to hook a terminal into the AT? >Or, can I just plug it in? The only hardware you need for connection is an adapter cable which provides a typical DB25 interface to the 9-pin serial connector on the IBM PC/AT. This adapter is available from an IBM PC product retailer or easily constructed from parts available at an electronic supply house. If interested in constructing your own, contact me and I will provide the wiring diagram for the 9-pin on the PC/AT as well as the corresponding DB25 pin numbers for a DTE configuration. (You will probably need to swap a few lines for a DCE configuration to attach to the TVI-925). >1. Will I have the same problem (as I do on the XT) with programs that >always write to the monitor, and not out the serial port? Specifically, >I am most interested in using symphony. Yes you will. The 'CTTY' command of PC-DOS can only re-direct the DOS level I/O calls for the keyboard and display. Applications which write directly to the video RAM can not be re-directed using this technique. This Unfortunately includes most IBM-PC display intensive applications. >2. Any other useful advice? Well, if you're into low-level hacking, you could write an assembler process to transmit the contents of the screen buffer to the serial port upon receipt of a command. This could in many ways resemble the print-screen procedure which is listed in the BIOS listings of the IBM PC Technical Reference. However this would not provide the 'real-time' interactiveness I believe you are looking for. -- Kevin Piette Phone: (203) 522-2116 Multimate International Corporation, Research & Development UUCP: ...!seismo!cmcl2!philabs!pwa-b!mmintl!kevinp