Msg: 4584 *Conference*
08-05-93 23:59:42
From: TRACY ALLEN
To : CARROLL LEWIS
Subj: REPLY TO MSG #4521 (SCREEN BUFFER)
Carroll, The altlcd, otherwise known as the previous screen buffer, is used by the TELCOM program. If you enter the TERM mode in TELCOM and a bunch of stuff scrolls by, you can only see 8 lines on screen at once. But if you press the F1 key, the 8 lines that were on the screen previously, the 8 lines that just scrolled off, will appear like magic. Pressin F1 again will get you back the current 8 lines. Those 8 lines of information are stored in the walah! previous screen buffer. It is 320 bytes of memory starting at 64704. That memory is used only by the TELCOM program, and about 60 bytes at the end are used when you are scrolling around the main model "T" menu. If you don't use TELCOM, the 260 bytes starting at 64704 remain undisturbed. Lots of machine language programs and ROM chips take advantage of that space as a "scratchpad" You can use it as a scratchpad, too, if you are convinced that TS-dos and Barcode are not going to use it. Most TS programs set up their own scrachpad space in a fake BASIC program that they generate on the menu. I don;t know about the barcode driver. hope this helps... Tracy