Gordon Banks MD	
1360 Scaife Hall

University of Pittsburgh

Pittsburgh, PA 15261

June 26, 1982



Bringing up ZCPR.



     ZCPR is a replacement for the CP/M Console Command Processor 

(CCP) which will run on Z80 micros.   The space saving allowed by 

using Z80 instructions instead of 8080 has allowed the authors of 

ZCPR  to extend the command list and improve on the original CCP.  

Once you have gotten used to it, you will never want to return to 

the  old  CCP.   The  full list of options is given in  the  file 

ZCPR.DOC, but included are the following:



     The  TYPE function can allow paging or not at the option  of 

the user.   This stops the annoying necessity of using ^s to stop 

the scrolling of the output.

     The  DIR function can show $SYS files as well as $DIR  files 

optionally.

     The ERA function prints the names of files being erased.

     A  LIST  function  sends output directly to  the  CP/M  LST: 

device and does not page.

     The user number is shown after the prompt,  such as B2>,  or 

A0>.  If the user level is 0, it may show A> or A0> per choice of 

the user.

     If  a  program to be executed is not found  on  the  current 

drive  and  user  level,  the system will search user  0  on  the 

current  drive  and user 0 on drive A before returning the  error 

message.   Thus  files that you use a great deal can be  kept  on 

drive  A,  user  0,  and are always found without specifying  the 

prefix A:, or duplicating them on all the disks.  

     The  SAVE command will accept hex values (such as DDT  gives 

them to you) so no conversion to decimal is needed.

     Commands such as REN and SAVE that may erase old versions of 

a  program  will query the user whether he wants  to  delete  the 

existing  file.  

     The  user can assemble ZCPR so that it executes any  command 

(or runs a program) whenever it is booted.  

     Several other functions have been added as explained in  the 

documentation on the disk.   



     The  file  ZCPR.ASM  must be assembled by  MAC,  so  I  have 

included  ZCPR.HEX  for  those  who don't  have  this  assembler.  

ZCPR1.HEX is assembled to run the com file named STARTUP whenever 

CP/M  is  booted.   The complete  instructions  for  configuring, 

assembling and using ZCPR are included in the file ZCPR.DOC.  The 

key  parameters you need to know if you reassemble the  ZCPR.ASM, 

are the location of the base page address for CCP, which is D400H 

for  the big board (see your CBIOS listing) and the memory  image 

location  of the CCP jump instructions which is 980H for the  big 

board.  

     A  quick synopsis of a session to integrate ZCPR  into  your 

system is given below:
.CP 6

B>sysgen             <--run sysgen to load memory with CP/M.

SYSGEN VER 2.2

SOURCE DRIVE NAME (OR RETURN TO SKIP)b

SOURCE ON B, THEN TYPE RETURN           <--hit return

FUNCTION COMPLETE

DESTINATION DRIVE NAME (OR RETURN TO REBOOT) <--hit return

B> save 38 cpm60.com      <--Save the SYSGEN image of CP/M to

                                 work with.

B> mac zcpr               <--If you assemble your own version,

CP/M MACRO ASSEM 2.0            otherwise, go on to next step.

DBEC

011H USE FACTOR

END OF ASSEMBLY

B>ddt cpm60.com          <--Now to integrate

DDT VERS 2.0

NEXT PC

2700 0100

-h980,d400               <--compute the offset: see (ZCPR.DOC)

DD80 3580                <--offset is 3580H (for 60K CP/M)

-izcpr.hex               <--init FCB

-r3580                   <--read in ZCPR with the offset

NEXT PC

2700 0000

-^C                      <--done

B>sysgen                 <--now to SYSGEN it onto disk

SYSGEN VER 2.2

SOURCE DRIVE NAME (OR RETURN TO SKIP)   <--hit return 

DESTINATION DRIVE NAME (OR RETURN TO REBOOT)b   <--onto B:

DESTINATION ON B, THEN TYPE RETURN             <--hit return

FUNCTION COMPLETE

DESTINATION DRIVE NAME (OR RETURN TO REBOOT) <--done for now.

B>