Dear Sir, I have get rid of to receive this PIC mails... I receive at least 70 mails per a day... How can I unscribe me? Thank You... -----Original Message----- From: Mark Willis To: PICLIST@MITVMA.MIT.EDU Date: 03 Kas}m 1998 Sal} 05:37 Subject: Re: PIC Programmer >Eric Smith wrote: >> >> Mark Willis wrote: >> > The 1488 and 1489 "always" exist on any standard serial port (And on >> > the better ones, they're socketed so if you should burn them out, you >> > can replace them, IMHO at least.) >> >> Often instead of a 1488 and 1489 you'll see a MAX232 or the like, which >> integrates receivers, transmitters, and charge pumps. In PCs the variants >> without the charge pumps are often used, since +/-12V are available. >> However, many PC power supplys are so wimpy on -12V that good multiport >> serial boards use the charge pumps anyhow. > > Yep, Shoulda mentioned the Max232 I see more 1488's/1489's/etc >myself, I do a lot of ISA and VLB PC Clone stuff though & that skews my >view > >> > Some LSI circuits may include them >> > internal (on the FGPA etc.), but not always. >> >> I've never heard of such a thing. Can you cite a reference? > > Take a look at a DTC 2280 IDE (or most any other) ISA paddle card, or >a DTC 2278E VLB HDC/IO card, or a current pentium motherboard (I can >supply a bunch of digitized photos.) If you can find a 1488 or 1489 or >MAX232 on there anywhere, I'll mail you a 16C84 that's sitting here in a >tube (2 SMC IC's, 1 100-pin and 1 68-pin, do the work, I assume, on >the DTC 2280 card. ) The DTC 2278E uses that super IO SMC 37C >chipset, works like a 16550AN pair plus 1488's/1489's. > >> >> >> Eric >> >> http://www.brouhaha.com/~eric/pic/ >> http://www.brouhaha.com/~eric/scenix/ >