braver@ernie.Berkeley.EDU (Michael Braverman) (07/27/87)
I have two questions. Question 1: I have an internal modem hooked up to the COM2 port of my 6300+. As has been pointed out earlier in this newsgroup, Unix does not come with a device driver for this port. I called the AT&T Hotline and was told that I could find everything I needed to write such a driver in a manual called the "Integrated Software Reference Manual." Has anyone ever seen this manual? Does it really contain everything I need, both to write the driver and to reconfigure the unix boot file? Better yet, has anyone figured out how to access COM2 some other way? I'd like to connect the internal modem to my UUCP utilities. Question 2: I have the standard video board with a monochrome monitor and I'd like to access the screen bitmap from C programs so I can write a graphics package. The Hotline people suggested that I use curses. Somehow, I don't think that will work. Is there some relatively safe way to do this short of opening /dev/mem and twiddling the bits therein. If that is the only way, does anyone know the memory address for the start of the bitmap and the format it is in? Thank you, Michael Braverman braver@ernie.berkeley.edu
hsc@mtund.ATT.COM (HARVEY COHEN) (07/29/87)
The AT&T Telephone Manager/Email software package for the UNIX on the PLUS comes with a driver that will work with most dumb COM2 ports, Hayes modems, and AT&T modems. The Price Element Code is either 1110-TEL or 1111-TEL (memory fails me). It is similar to the Telephone Manager and Email packages for the UNIX PC. It is fairly pricey. Order direct from AT&T. Alternatively, CTC Systems (1928A Old Middlefield Way, Mt. View, CA 94043, tel. 415-966-1688) sells two four-port serial boards with UNIX drivers for the PLUS. Both are good dollar values. One has four dumb, IBM-PC-standard, 8250A-based ports. Since it depends on the CPU catching every interrupt, UNIX throughput is limited and characters tend to get dropped. For running login ports for terminals, though, it's usually adequate. The other board has a Z80B and about 256Kbytes of buffering. It does canonical processing for terminal logins, and it runs uucp and cu at 9600 baud. I have one on my machine, and I love it. -- Harvey S. Cohen, AT&T Data Systems, Lincroft, NJ, mtund!hsc, (201)576-6387