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Patch EDTASM+ To Disk: Difference between revisions
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'''Patch EDTASM+ To Disk - To End Those Cassette Blues - By Roger Schrag ''' | '''Patch [[EDTASM+]] To Disk - To End Those Cassette Blues - By Roger Schrag ''' | ||
From: The Raimbow Magazine DIC 1982, Pag 29. | From: The Raimbow Magazine DIC 1982, Pag 29. | ||
Radio Shack's EDTASM+ package is a powerful, well-written programming tool. But for people with disk drives, it is very agonizing to have to go back to using cassettes to store source code files. There are editor assemblers on the market that do support disk drives, but they are usually much more expensive, and sometimes require the Flex Operating System, or something else that not everyone owns. | Radio Shack's [[EDTASM+]] package is a powerful, well-written programming tool. But for people with disk drives, it is very agonizing to have to go back to using cassettes to store source code files. There are editor assemblers on the market that do support disk drives, but they are usually much more expensive, and sometimes require the Flex Operating System, or something else that not everyone owns. | ||
What I have put together here is a series of patches that make | What I have put together here is a series of patches that make [[EDTASM+]] use the disk drive instead of the tape recorder for mass storage. The finished product requires only 16K Extended Basic and one drive. | ||
Patching | Patching EDTASM+ to use disks is relatively easy to do. The first thing is to move it into RAM so that we can alter bytes of code and thus alter its operation. The move can be accomplished by typing in '''U''' C000 1000 27FF from Zbug. To save a copy of it on tape, enter P EDTASM 1000 37FE 1000. Since it was written entirely in position independent code, it can reside anywhere in memory, and function without modification. | ||
The next step is to enter the source code shown in the listing. Assemble it onto tape directly after the copy of EDTASM+ you made from Zbug. You'll probably also want to save the source code for future use. | The next step is to enter the source code shown in the listing. Assemble it onto tape directly after the copy of EDTASM+ you made from Zbug. You'll probably also want to save the source code for future use. | ||
Line 16: | Line 16: | ||
You may save the finished program onto disk by typing in SAVEM "EDTASM+",&HE80, &H37FF, &HE80. Now whenever you want to use your editor assembler, just enter LOADM "EDTASM+": EXEC. with the disk version of EDTASM+, the '''L,W,A,''' and '''V''' commands will work differently than they used to. To load source code, simply press '''L''' and enter. The computer will ask for a filename. Type in a standard filename as you would in Basic. If you don't specify an extension, none will be assumed. The file will then be loaded. The '''W''' command works in the same way. | You may save the finished program onto disk by typing in SAVEM "EDTASM+",&HE80, &H37FF, &HE80. Now whenever you want to use your editor assembler, just enter LOADM "EDTASM+": EXEC. with the disk version of EDTASM+, the '''L,W,A,''' and '''V''' commands will work differently than they used to. To load source code, simply press '''L''' and enter. The computer will ask for a filename. Type in a standard filename as you would in Basic. If you don't specify an extension, none will be assumed. The file will then be loaded. The '''W''' command works in the same way. | ||
To assemble a program, type in A and any assembly switches you would like to use. Unless you choose the '''IM''' or '''NO''' options, you will be asked for the filename. As the listing scrolls across the screen, the computer will stop from time to time to write a sector to the disk. If you press Break, you may have to wait a moment for the computer to close the file. | To assemble a program, type in '''A''' and any assembly switches you would like to use. Unless you choose the '''IM''' or '''NO''' options, you will be asked for the filename. As the listing scrolls across the screen, the computer will stop from time to time to write a sector to the disk. If you press Break, you may have to wait a moment for the computer to close the file. | ||
The V command will merely open a file and close it again. This verifies that a file is listed in the directory and that there are no problems with its structure. | The '''V''' command will merely open a file and close it again. This verifies that a file is listed in the directory and that there are no problems with its structure. | ||
On a 16K machine, you will have 1.5K for your text buffer. A 32K machine will offer 17.5K. For those of you who have source code files on tape, you may transfer them to diskette with the Basic program I have included. EDTASM+ uses ASCII codes that Basic doesn't recognize.Therefore INPUT#-I can't be used to read the source code file from the cassette. A machine language routine is necessary. | On a 16K machine, you will have 1.5K for your text buffer. A 32K machine will offer 17.5K. For those of you who have source code files on tape, you may transfer them to diskette with the Basic program I have included. EDTASM+ uses ASCII codes that Basic doesn't recognize.Therefore INPUT#-I can't be used to read the source code file from the cassette. A machine language routine is necessary. | ||
'''Listing I:''' | '''Listing I:''' | ||
00001 ************************* | |||
00002 * EDTASM+ HITS THE DISK * | 00002 * EDTASM+ HITS THE DISK * | ||
00003 ************************* | 00003 ************************* | ||
Line 33: | Line 33: | ||
00009 *HAKE SURE INTERRUPTS ARE ENABLED | 00009 *HAKE SURE INTERRUPTS ARE ENABLED | ||
00010 *SO THAT THE DISK DRIVE WILL | 00010 *SO THAT THE DISK DRIVE WILL | ||
00011 *SHUT OFF PROPERLY | |||
00012 ORG $1516 | 00012 ORG $1516 | ||
00013 LBSR INTRPT | 00013 LBSR INTRPT | ||
Line 44: | Line 44: | ||
00020 LBRA FNAME | 00020 LBRA FNAME | ||
00021 * | 00021 * | ||
00022 * | |||
00023 *CHANGE REFERENCES TO DEVICE #-1 | 00023 *CHANGE REFERENCES TO DEVICE #-1 | ||
00024 *(TAPE) TO DEVICE #1 (DISK) | 00024 *(TAPE) TO DEVICE #1 (DISK) | ||
Line 50: | Line 50: | ||
00026 LDB #1 | 00026 LDB #1 | ||
00027 ORG $1574 | 00027 ORG $1574 | ||
00028 LDB #1 | |||
00029 ORG #15AD | 00029 ORG #15AD | ||
00030 LDA #1 | 00030 LDA #1 | ||
Line 97: | Line 97: | ||
00073 LDA #$26 EDTASN+ INTO | 00073 LDA #$26 EDTASN+ INTO | ||
00074 STA ,X MEMORY | 00074 STA ,X MEMORY | ||
00075 LDA #$38 NEXT SET THE | |||
00076 STA >$FF LOW MEM POINTER | |||
00077 LBRA $1005 ENTER PROGRAM | |||
00078 * | |||
00079 * | |||
00080 *SUBROUTINES CALLED BY THE PR06RAM | |||
00081 *PATCHES TO ENABLE THE NEW FEATURES | |||
00082 * | |||
00083 * | |||
00084 *ENABLE ALL INTERRUPTS SO THAT THE | |||
00085 *DISK DRIVE WILL SHUT OFF CORRECTLY | |||
00086 *AFTER TWO SECONDS OF NOT BEIN6 USED | |||
00087 INTRPT CLRB CLEAR B | |||
00088 TFR B,DP CLEAR DP | |||
00089 ANDCC #0 ENABLE INTERRUPTS | |||
00090 RTS RETURN TO PROGRAM | |||
00093 *CLOSE FILES & RETURN TO PROGRAM | |||
00094 CLOSE JSR $CA3B CLOSE FILES | |||
00095 LBRA $1377 RETURN TO PROGRAM | |||
00096 * | |||
00097 * | |||
00098 *ROUTINE TO ALLOW YOU TO ENTER A | |||
00099 *NAME FOR THE DISK FILE | |||
00100 FNAKE PSHS U SAVE U | |||
00101 LEAX PROMPT,PCR "FILENAME?" | |||
00102 LBSR $1221 PRINT PROMPT | |||
00103 LBSR $1EC6 GET USER INPUT | |||
00104 LDB <$12 GET LEN6TH OF INPUT | |||
00105 LDX <$13 GET ADDRESS OF INPUT | |||
00106 PSHS DP SAVE DP | |||
00107 CLRA CLEAR A | |||
00108 TFR A, DP CLEAR DP | |||
00109 LEAY BACK,PCR SAVE A RETURN | |||
00110 PSHS Y ADDRESS ON STACK | |||
00111 CLR ,-S LOWER STACK | |||
00112 LDA $95A SET DEFAULT | |||
00113 STA $EB DRIVE NUMBER | |||
00114 LDY #$94C NAME STORAGE AREA | |||
00115 LDA #$20 ASCII SPACE | |||
00116 ERASE STA ,Y+ ERASE FILENAME | |||
00117 CMPY #$957 STORAGE AREA | |||
00118 BNE ERASE | |||
00119 JMP $C8A4 GO GET FILENAME | |||
00120 BACK PULS DP RETRIEVE DP | |||
00121 PULS U RETRIEVE U | |||
00122 RTS RETURN TO PROGRAM | |||
00123 PROMPT FCC *FILENAME?* | |||
00124 FCB $A0 TERMINATOR | |||
00125 * | |||
00126 * | |||
00127 *ROUTINES TO OPEN A DISK FILE | |||
00128 *NOTE THAT THERE ARE SLIGHT DIFFERENCES | |||
00129 *FOR LOAD, WRITE, AND ASSEMBLE | |||
00130 LOAD LDA #$49 (I)NPUT MODE | |||
00131 LDX #$1FF ASCII FORMAT | |||
00132 BRA OPEN GO OPEN FILE | |||
00133 WRITE LDA #$4F (O)UTPUT MODE | |||
00134 LDX #$1FF ASCII FORMAT | |||
10135 BRA OPEN GO OPEN FILE | |||
00136 ASSEH LDA #$4F (O)UTPUT MODE | |||
00137 LDX #$200 BINARY FORMAT | |||
00138 OPEN STX $957 STORE FORMAT | |||
00139 LDX #$100 RECORD LENGTH | |||
00140 STX #97C IS 256 BYTES | |||
00141 LDB #l USE DEVICE #1 | |||
00142 JMP $C468 GO OPEN FILE | |||
00143 * | |||
00144 * | |||
00145 *ALTER ERROR HANDLING ROUTINE TO | |||
00146 *HANDLE NEN DISK RELATED ERRORS: | |||
00147 * DF VF NE MP FN FH | |||
00148 *IF NOT ONE OF THOSE, | |||
00149 *IS ASSUMED TO BE 10 | |||
00150 ERROR1 EXG A,B CODE INTO A | |||
00151 CLRB CLEAR B | |||
00152 LDX #CODES LIST OF ERRORS | |||
00153 GETERR CMPA B,X COMPARE CODES | |||
00154 BEQ RET RETURN IF MATCH | |||
00155 TST B,X SEE IF AT END | |||
00156 BEQ RET RETURN IF SO | |||
00157 INCB GET NEXT CODE | |||
00158 BRA GETERR LOOP BACK | |||
00159 RET RTS RETURN TO PROGRAM | |||
00160 ERR0R2 LEAX ERRS,PCR MESSAGE TABLE | |||
00161 LBRA $121E GO PRINT MESSAGE | |||
00162 * | |||
00163 * | |||
00164 *LIST OF ERROR CODES | |||
00165 CODES FCB $38 DF | |||
00166 FCB $32 VF | |||
00167 FCB $34 NE | |||
00168 FCB $3C WP | |||
00169 HUB $3E FN | |||
00170 FCB $2A FM | |||
00171 FCB $0 | |||
00172 * | |||
00173 * | |||
00174 *LIST OF ERROR MESSAGES | |||
00175 ERRS FCC *DISK FULL* | |||
00176 FCB $A0 TERMINATOR | |||
00177 FCC *VERIFICATION ERROR* | |||
00178 FCB $A0 TERMINATOR | |||
00179 FCC *FILE NOT FOUND* | |||
00180 FCB $A0 TERMINATOR | |||
00181 FCC *HRITE PROTECT* | |||
00182 FCB $A0 TERMINATOR | |||
00183 FCC *BAD FILENAME* | |||
00184 FCB $A0 TERMINATOR | |||
00185 FCC *BAD FILE MODE* | |||
00186 FCB $A0 TERMINATOR | |||
00187 FCC *I/O ERROR* | |||
00188 FCB $A0 TERMINATOR | |||
00189 END START |
Latest revision as of 13:09, 13 October 2015
Patch EDTASM+ To Disk - To End Those Cassette Blues - By Roger Schrag
From: The Raimbow Magazine DIC 1982, Pag 29.
Radio Shack's EDTASM+ package is a powerful, well-written programming tool. But for people with disk drives, it is very agonizing to have to go back to using cassettes to store source code files. There are editor assemblers on the market that do support disk drives, but they are usually much more expensive, and sometimes require the Flex Operating System, or something else that not everyone owns.
What I have put together here is a series of patches that make EDTASM+ use the disk drive instead of the tape recorder for mass storage. The finished product requires only 16K Extended Basic and one drive.
Patching EDTASM+ to use disks is relatively easy to do. The first thing is to move it into RAM so that we can alter bytes of code and thus alter its operation. The move can be accomplished by typing in U C000 1000 27FF from Zbug. To save a copy of it on tape, enter P EDTASM 1000 37FE 1000. Since it was written entirely in position independent code, it can reside anywhere in memory, and function without modification.
The next step is to enter the source code shown in the listing. Assemble it onto tape directly after the copy of EDTASM+ you made from Zbug. You'll probably also want to save the source code for future use.
Now you are ready to load in the files you have saved on the tape. First, you will want to insert your disk cartridge so that the finished product can be saved on disk. Type CLOADM to load the RAM version of EDTASM+, but don't execute it yet. Next, load in the patches you keyed in by typing CLOADM again. Parts of EDTASM+ will now be overwritten with new code, and a block of additional subroutines will be added on.
You may save the finished program onto disk by typing in SAVEM "EDTASM+",&HE80, &H37FF, &HE80. Now whenever you want to use your editor assembler, just enter LOADM "EDTASM+": EXEC. with the disk version of EDTASM+, the L,W,A, and V commands will work differently than they used to. To load source code, simply press L and enter. The computer will ask for a filename. Type in a standard filename as you would in Basic. If you don't specify an extension, none will be assumed. The file will then be loaded. The W command works in the same way.
To assemble a program, type in A and any assembly switches you would like to use. Unless you choose the IM or NO options, you will be asked for the filename. As the listing scrolls across the screen, the computer will stop from time to time to write a sector to the disk. If you press Break, you may have to wait a moment for the computer to close the file.
The V command will merely open a file and close it again. This verifies that a file is listed in the directory and that there are no problems with its structure.
On a 16K machine, you will have 1.5K for your text buffer. A 32K machine will offer 17.5K. For those of you who have source code files on tape, you may transfer them to diskette with the Basic program I have included. EDTASM+ uses ASCII codes that Basic doesn't recognize.Therefore INPUT#-I can't be used to read the source code file from the cassette. A machine language routine is necessary.
Listing I:
00001 ************************* 00002 * EDTASM+ HITS THE DISK * 00003 ************************* 00004 * 00005 *BY ROGER SCHRAG 00006 * 10/15/82 00007 * 00008 * 00009 *HAKE SURE INTERRUPTS ARE ENABLED 00010 *SO THAT THE DISK DRIVE WILL 00011 *SHUT OFF PROPERLY 00012 ORG $1516 00013 LBSR INTRPT 00014 * 00015 * 00016 *CHANGE FILENAME HANDLING SYSTEM 00017 *TO ALLOW THE USER TO ENTER FULL 00018 *DISK FILE NAMES: FILENAME/EXT:D 00019 ORG $15E0 00020 LBRA FNAME 00021 * 00022 * 00023 *CHANGE REFERENCES TO DEVICE #-1 00024 *(TAPE) TO DEVICE #1 (DISK) 0002S ORG $1547 00026 LDB #1 00027 ORG $1574 00028 LDB #1 00029 ORG #15AD 00030 LDA #1 00031 ORG #15CD 00032 LDA #1 00033 * 00034 * 00035 *HAKE SURE THE DISK FILE HAS BEEN 00036 *CLOSED WHEN ACCESS TO IT IS COMPLETE 00037 ORG $1B52 00038 LBSR CLOSE 00039 * 00040 * 00041 *AT THE RIGHT TIME, CALL A ROUTINE 00042 *TO OPEN THE DISK FILE, INSTEAD OF 00043 *A ROUTINE TO OPEN THE TAPE FILE 00044 ORG #15BA PATCHES INTO 00045 LDU #ASSEM "A" COMMAND 00046 ORG $15BF PATCHES INTO 00047 LDU #LOAD "L" COMMAND 00048 ORG $15C4 PATCHES INTO 00049 LDU WRITE "W" COMMAND 00050 ORG $163A PATCHES INTO 00051 LDU #LOAD "V" COMMAND 00052 * 00053 * 00054 *ALTER ERROR HANDLIN6 SYSTEM TO 00055 *ACCOUNT FOR NEW ERROR MESSAGES 00056 ORG #1721 00057 LBSR ERROR1 00058 CLR <$1 00059 CLR <$4 00060 LBSR ERR0R2 00061 LBRA $172F 00062 * 00063 * 00064 ORG $E80 00065 * 00066 * 00067 *NEW ENTRY AREA TO EDTASM 00068 START LDX #$1E00 HE MUST FIRST 00069 LDA l$AF FIX THE THREE 00070 STA ,X+ BYTES THAT 00071 LDA #$5A BASIC CLOBBERS 00072 STA ,X+ WHILE LOADING 00073 LDA #$26 EDTASN+ INTO 00074 STA ,X MEMORY 00075 LDA #$38 NEXT SET THE 00076 STA >$FF LOW MEM POINTER 00077 LBRA $1005 ENTER PROGRAM 00078 * 00079 * 00080 *SUBROUTINES CALLED BY THE PR06RAM 00081 *PATCHES TO ENABLE THE NEW FEATURES 00082 * 00083 * 00084 *ENABLE ALL INTERRUPTS SO THAT THE 00085 *DISK DRIVE WILL SHUT OFF CORRECTLY 00086 *AFTER TWO SECONDS OF NOT BEIN6 USED 00087 INTRPT CLRB CLEAR B 00088 TFR B,DP CLEAR DP 00089 ANDCC #0 ENABLE INTERRUPTS 00090 RTS RETURN TO PROGRAM 00093 *CLOSE FILES & RETURN TO PROGRAM 00094 CLOSE JSR $CA3B CLOSE FILES 00095 LBRA $1377 RETURN TO PROGRAM 00096 * 00097 * 00098 *ROUTINE TO ALLOW YOU TO ENTER A 00099 *NAME FOR THE DISK FILE 00100 FNAKE PSHS U SAVE U 00101 LEAX PROMPT,PCR "FILENAME?" 00102 LBSR $1221 PRINT PROMPT 00103 LBSR $1EC6 GET USER INPUT 00104 LDB <$12 GET LEN6TH OF INPUT 00105 LDX <$13 GET ADDRESS OF INPUT 00106 PSHS DP SAVE DP 00107 CLRA CLEAR A 00108 TFR A, DP CLEAR DP 00109 LEAY BACK,PCR SAVE A RETURN 00110 PSHS Y ADDRESS ON STACK 00111 CLR ,-S LOWER STACK 00112 LDA $95A SET DEFAULT 00113 STA $EB DRIVE NUMBER 00114 LDY #$94C NAME STORAGE AREA 00115 LDA #$20 ASCII SPACE 00116 ERASE STA ,Y+ ERASE FILENAME 00117 CMPY #$957 STORAGE AREA 00118 BNE ERASE 00119 JMP $C8A4 GO GET FILENAME 00120 BACK PULS DP RETRIEVE DP 00121 PULS U RETRIEVE U 00122 RTS RETURN TO PROGRAM 00123 PROMPT FCC *FILENAME?* 00124 FCB $A0 TERMINATOR 00125 * 00126 * 00127 *ROUTINES TO OPEN A DISK FILE 00128 *NOTE THAT THERE ARE SLIGHT DIFFERENCES 00129 *FOR LOAD, WRITE, AND ASSEMBLE 00130 LOAD LDA #$49 (I)NPUT MODE 00131 LDX #$1FF ASCII FORMAT 00132 BRA OPEN GO OPEN FILE 00133 WRITE LDA #$4F (O)UTPUT MODE 00134 LDX #$1FF ASCII FORMAT 10135 BRA OPEN GO OPEN FILE 00136 ASSEH LDA #$4F (O)UTPUT MODE 00137 LDX #$200 BINARY FORMAT 00138 OPEN STX $957 STORE FORMAT 00139 LDX #$100 RECORD LENGTH 00140 STX #97C IS 256 BYTES 00141 LDB #l USE DEVICE #1 00142 JMP $C468 GO OPEN FILE 00143 * 00144 * 00145 *ALTER ERROR HANDLING ROUTINE TO 00146 *HANDLE NEN DISK RELATED ERRORS: 00147 * DF VF NE MP FN FH 00148 *IF NOT ONE OF THOSE, 00149 *IS ASSUMED TO BE 10 00150 ERROR1 EXG A,B CODE INTO A 00151 CLRB CLEAR B 00152 LDX #CODES LIST OF ERRORS 00153 GETERR CMPA B,X COMPARE CODES 00154 BEQ RET RETURN IF MATCH 00155 TST B,X SEE IF AT END 00156 BEQ RET RETURN IF SO 00157 INCB GET NEXT CODE 00158 BRA GETERR LOOP BACK 00159 RET RTS RETURN TO PROGRAM 00160 ERR0R2 LEAX ERRS,PCR MESSAGE TABLE 00161 LBRA $121E GO PRINT MESSAGE 00162 * 00163 * 00164 *LIST OF ERROR CODES 00165 CODES FCB $38 DF 00166 FCB $32 VF 00167 FCB $34 NE 00168 FCB $3C WP 00169 HUB $3E FN 00170 FCB $2A FM 00171 FCB $0 00172 * 00173 * 00174 *LIST OF ERROR MESSAGES 00175 ERRS FCC *DISK FULL* 00176 FCB $A0 TERMINATOR 00177 FCC *VERIFICATION ERROR* 00178 FCB $A0 TERMINATOR 00179 FCC *FILE NOT FOUND* 00180 FCB $A0 TERMINATOR 00181 FCC *HRITE PROTECT* 00182 FCB $A0 TERMINATOR 00183 FCC *BAD FILENAME* 00184 FCB $A0 TERMINATOR 00185 FCC *BAD FILE MODE* 00186 FCB $A0 TERMINATOR 00187 FCC *I/O ERROR* 00188 FCB $A0 TERMINATOR 00189 END START