Athena Systems Development Group 619-549-4056 PC-VT Release 10.1 1/23/91 PC-VT now supports a varied combination of communication ports and interrupt chaining. Using the standard selection mechanism (i.e the 6 key in the SETUP-B frame after pointing to the correct feature column or the c key), you can select these combinations : COM Port Interrupt 1 3F8 4 Standard 2 2F8 3 Standard 3 3E8 4 Pseudo Standard 4 2E8 3 Pseudo Standard 5 2E8 4 Non Standard 6 2E0 3 Non Standard COM 1 and 2 are the standard ports. COM 3 and 4 are the almost standard ports. COM 5 and 6 are used on some boards as what they call COM 3 and 4. For additional flexibility, you can select one of these ports and change the Interrupt IRQ number. To change the IRQ number, select the correct port with the 'c' key and then press the 'i' key. Each time you press the 'i' key, the IRQ number will go up by one. It will cycle 0-7 and repeat. Pick the IRQ number you want. Make sure you select a 'good' IRQ number for your system. Selecting a 'bad' IRQ number (like one the disk drive uses) will surely lock up your computer. The port and IRQ information is saved with the SETUP and DIALER just like all the other feature selections. PC-VT also supports interrupt chaining. If you have two ports on a single IRQ line, PC-VT checks the port's IID register. If the Interrupt Pending bit is not on, it chains any other ISR that may be attached to that IRQ line. Thanks to Malcolm Michael at Triad for prompting this enhancement. Other New Features and Bug Fixes : ---------------------------------- 1. On the ANSI/VT52 selection on the SETUP B screen, you can now select VT52 ANSI ANSI.SYS from the following prompt: ANSI/VT52 0=VT52 1=ANSI (VT100/102) 2=ANSI.SYS The new selection ANSI.SYS makes PC-VT interpret escape sequences more like ANSI.SYS and less like the ANSI standard. Microsoft chose to change some of the sequences when they developed ANSI.SYS. Enables these sequences : [2m clear the screen and home the cursor Enables these characters : clear the screen and home the cursor 2. Fixed a bug in the Index and Reverse Index sequences. They should only scroll the window if the cursor is ON the top/bottom line of the margin. Found by George Fluck at Standard and Poors. 3. Fixed a bug in loading of Table keys if macro keys were not done first. Found by George Fluck at Standard and Poors.