Just a minute ... what do you mean by "programmer?" This thing is EPROM based, hence, doesn't provide programming capability for your single-chipper. In fact, mine, at least, uses a PLCC-44 8031. If you replace that with a PLCC-based 805x, it will still have its /EA signal grounded, which turns it into an 8031. If you get out your XACTO knife and a pullup resistor, you can modify it to use internal program memory, but I'd read the find print before endeavoring to do any of that.
As I said, I use a modified SPLD, one of two on the board, which allows me to substitute a DS1230Y for the program-memory EPROM, and use that as read-write memory. That way I can use a resident debug monitor that allows me to patch the code in the DS1230Y if that's what I want to do, or to run a trace, or set breakpoints. Their monitor doesn't allow that, since it assumes EPROM contains the code space. As I said ... read the fine print. Look at the schematic diagram. Read the configuration options in the doc files. It is a remarkably good buy, but you should go in with your eyes open. Even a mere $40 is too much to spend if you don't know what you're getting. You'll be disappointed if you don't understand what it is and can do. I find it a very useful board, but it doesn't support internal code usage without some surgical modification, AFAIK. regards, Richard Erlacher ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, January 04, 2007 12:44 PM Subject: Re: [Sdcc-user] Cheap Used Devel Board > Thanks Richard! > > That NMIY-0031 seems like an awesome deal for a complete 8051 environment > with everything. Documentation, software, programmer, monitor; the works. > > -Warren > > ----- Original Message ----- > From: Richard Erlacher <[EMAIL PROTECTED]> > To: [email protected] > Sent: Thursday, January 4, 2007 12:40:18 PM GMT-0600 US/Central > Subject: Re: [Sdcc-user] Cheap Used Devel Board > > Hi! > > I'd recommend you visit 8052.com and look around, and maybe ask some > questions there. Note that the "chat" forum is NOT a real-time chat > environment as has become popular in recent years. One word of caution > ... > do NOT use SMS-style abbreviations there, but, rather take the extra few > milliseconds to type out the words in your questions. In fact, read ALL > the > instructions at the beginning of your session before you attempt to post > anything, and be sure to search thoroughly before posting what may well be > a > repeatedly-answered question. > > There are lots of opinions offerred there, including mine, and I suggest > you > take all of them with the proverbial "grain of salt." > > One relatively cheap board that gets little mention these days, is the > NMIY-0031, which costs about $39.00 US. I've used this from time to time > without being disappointed. Just search for NMIY-0031 on GOOGLE, and > you'll > find it. Read the fine print, though. This one has sockets for external > memory, but will execute internal code if you "un-ground" the /EA signal, > which you have to do surgically. I've been using one with a modified GAL > that allows me to use a battery-backed RAM in place of a PROM. That's > very > convenient for many things. > > regards, > > Richard Erlacher > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Thursday, January 04, 2007 10:56 AM > Subject: [Sdcc-user] Cheap Used Devel Board > > >> >> I bought an 8051 (89C2051) development board off of ebay a couple of >> weeks >> ago, and I got burned pretty bad. The onboard 8051 has no bootloader and >> has no method of writing the eeprom without building a circuit just to >> add >> software! I spent the shipping time learning about the 8051 and am very >> intrigued. I'd like to continue playing with the chip, but I'm kind of >> stuck with emulators for now. >> >> Anyways, does anyone have any unused 8051-based development boards they >> can part with for cheap? I'd like something with at least 4k of flash, >> and >> either an ISP builtin or at least a bootloader so I can copy software. >> >> -Warren >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share >> your >> opinions on IT & business topics through brief surveys - and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Sdcc-user mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/sdcc-user > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sdcc-user > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sdcc-user ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Sdcc-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sdcc-user
