u557593877ea@ucdavis.UUCP (Bruce K. Martin Jr.) (01/18/86)
Fellow netlanders--
I am looking for a quick and dirty way to get one CP/M program to execute
another. I have been told (by someone who didn't have the details) that
it is possible to have the CCP perform this function (thereby relieving me
of the problem of writeing a loader). If anyone has done this or could give
me a pointer to some information, I would appreciate the help.
Thanks in advance,
Bruce
--
Bruce K. Martin Jr. [UUCP] ...{dual,lll-crg,ucbvax}!ucdavis!deneb!u557593877ea
(916) 756-6518 [ARPA] ucdavis!deneb!u557593877ea@ucb-vax.arpa
As usual, all the above views are completely my own. All proprietary
names and phrases are the property of their respective firms. Is that all mom?
"You have to be trusted by the people that you lie to..."
Pink Floydjparnas@vger.UUCP (Jacob M. Parnas) (01/19/86)
In article <60@ucdavis.UUCP>, u557593877ea@ucdavis.UUCP (Bruce K. Martin Jr.) writes: > Fellow netlanders-- > I am looking for a quick and dirty way to get one CP/M program to execute > another. I have been told (by someone who didn't have the details) that > it is possible to have the CCP perform this function (thereby relieving me > of the problem of writeing a loader). If anyone has done this or could give > me a pointer to some information, I would appreciate the help. The best example that I have of this is contained in the source code to the public domain program SYNONYM3. Basically what is done is that the command line buffer in the CCP is stuffed with the command line to be executed, the proper length and character position pointer is set and control is transferred to the CCP. This does not work with ZCPR, and can only be used if the program you are chaining from does not overwrite the CCP. Get the source to SYNONYM3 from a BBS or your local user group and have fun. John M. Sully ...!ucbvax!ucscc!ucscl!suzuki
michaelk@copper.UUCP (Michael Kersenbrock) (01/20/86)
If you are using CP/M 3.0, you can use the "chain to program" BDOS service call. It is bdos function 47. You load a null-terminated command line into the default dma buffer, then: You have reg C: 2fh reg E: ffh if you want the ccpt to initialize the default drive to the "current" drive and user number (rather than "reset" to default values). Then call the BDOS (addr 5 was it?). Don't know off hand if this call works in 2.2 or not. Haven't worked with that version for a few years now. -- Mike Kersenbrock Tektronix Software Development Products Aloha, Oregon
edg@micropro.UUCP (Ed Greenberg) (01/20/86)
In article <306@vger.UUCP> jparnas@vger.UUCP (Jacob M. Parnas) writes: >In article <60@ucdavis.UUCP>, u557593877ea@ucdavis.UUCP (Bruce K. Martin Jr.) writes: >> Fellow netlanders-- >> I am looking for a quick and dirty way to get one CP/M program to execute >> another. I have been told (by someone who didn't have the details) that >> it is possible to have the CCP perform this function (thereby relieving me >> of the problem of writeing a loader). If anyone has done this or could give >> me a pointer to some information, I would appreciate the help. > >The best example that I have of this is contained in the source code to > ... An easier way to do this is to write a $$$.SUB file onto the A drive of the system, then warm boot. A $$$.SUB file is usually the result of running SUBMIT. The format is to have all the commands (with arguments expanded) in REVERSE order with each command occupying a 128 byte record. Thus record 0 of the file will contain the last command to be executed and record N-1 will contain the first command, where there are N commands. The format of each record is a count byte at offset 0, then the command line to be executed at offset 1, then a 0 byte immediately after the command (no CR or LF). You can examine an existing $$$.SUB by running a long submit, pressing the reset button halfway through, then booting from ANOTHER boot disk and loading the original boot disk in B:. Then use DDT on the existing $$$.SUB file. Be sure to delete this file before putting the boot disk back in A: or you will keep going where you left off the next time you warm boot. DBASE II uses this method of program chaining, to execute something, then return to DBASE. You can too. You don't have to worry about overwriting the CCP or anything. Another trick is to reload your program at the end of the chain procedure with some argument that tells it that it is being rerun. Thus, you might get dates and other parameters from a file rather than the user... Avoid copyright messages, etc. Let me know if you want to discuss this sort of thing further. -e -- Ed Greenberg | {hplabs,glacier}!well!micropro!edg MicroPro International Corp. | {ucbvax,decwrl}!dual!micropro!edg San Rafael, California | {lll-crg,ptsfa}!micropro!edg
rab@well.UUCP (Bob Bickford) (01/22/86)
In article <169@copper.UUCP>, michaelk@copper.UUCP (Michael Kersenbrock) writes: > If you are using CP/M 3.0, you can use the "chain to program" BDOS > service call. It is bdos function 47. > > Don't know off hand if this call works in 2.2 or not. Haven't worked > with that version for a few years now. > Nope, no such call in 2.2 The call exists in 3.0 as well as MP/M and CP/M-86 however. Robert Bickford (rab@well.uucp)
Chapman.ES@xerox.ARPA (01/22/86)
If a discussion ensues, I'd like to be included. Has anyone mentioned that placing a (single) new command, in the format you describe for the submit file, at CCP+3, and then just RETurning from your program will also do a chain? I believe that the current disk and user stay logged in with this procedure. This is for CP/M 1.x and 2.x, and of course, only works if the CCP hasn't been overwritten. I don't know about other versions of CP/M and I haven't ever used this myself, so some of the details may not be exactly correct. Cheryl
shaprkg@sdcrdcf.UUCP (Bob Shapiro) (01/23/86)
In article <533@well.UUCP> rab@well.UUCP (Bob Bickford) writes: >In article <169@copper.UUCP>, michaelk@copper.UUCP (Michael Kersenbrock) writes: >> If you are using CP/M 3.0, you can use the "chain to program" BDOS >> service call. It is bdos function 47. >> >> Don't know off hand if this call works in 2.2 or not. Haven't worked >> with that version for a few years now. >> > >Nope, no such call in 2.2 >The call exists in 3.0 as well as MP/M and CP/M-86 however. > > Robert Bickford (rab@well.uucp) The BDS C compiler for 8-bit CPM systems has both chaining of programs and root-segment capabilities. Its a good deal even without these features, but here is an added bonus for you. Bob Shapiro