290 lines
6.9 KiB
Plaintext
290 lines
6.9 KiB
Plaintext
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3
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---------------------------------------
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[Ctrl-S pauses/Space=quit]
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3
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0
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THERE ARE TWO KNOWN WAYS TO WRITE
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PROTECT A RAMCARD. THIS ONE INVOLVES
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USING A SWITCH RIGHT ON THE RAMCARD. TO
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DO THIS YOU MUST HAVE A LITTLE KNOW HOW
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OF THE RAM CARD OR OWN A SCHEMATIC OF
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YOUR RAM CARD. YOU MUST BE ABLE TO FIND
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THE R/W LINE. FIRST
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---------------------------------------
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Enter (1-10, M=Menu, Q=Quit) :4
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---------------------------------------
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[Ctrl-S pauses/Space=quit]
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4
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HOW TO MODIFY PRO-DOS TO WORK
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** WITH ANY ROM & OTHER PRO-DOS INFO **
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FIRST, MAKE A COPY OF THE DISK USING
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COPYA FROM THE DOS 3.3 MASTER. THEN
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USING ANY 16 SECTOR DISK-ZAP UTILITY
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THE FOLLOWING SECTORS ARE CHANGED:
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TRACK 1, SECTOR A: BYTES E8
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THROUGH E9 BECOME "EA"
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TRACK 1, SECTOR C: BYTES 5F
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THROUGH 71 BECOME "EA"
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THE ROUTINES AT THESE LOCATIONS
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WERE LOOKING FOR "SIGNATURE" BYTES
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IN THE F8 MONIT
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---------------------------------------
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Enter (1-10, M=Menu, Q=Quit) :
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Enter (1-10, M=Menu, Q=Quit) :5
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---------------------------------------
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[Ctrl-S pauses/Space=quit]
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5
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0
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****************************************
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** **
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** A NEW 'DOS' TIP TO ADD **
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** DISK SPACE TO YOUR **
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** DOS 3.3 DISKS **
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** **
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** BY: MARC EPSTEIN **
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** **
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*****************
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---------------------------------------
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Enter (1-10, M=Menu, Q=Quit) :M8
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---------------------------------------
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[Ctrl-S pauses/Space=quit]
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PROGRAM COMPRESSION
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"HOW TO" AND A UTILITY PROGRAM
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==============================
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WITH IN MANY CRACKED PROGRAMS LURK
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MANY WAISTFUL REPETITIONS OF DATA (I.E.
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23 04 59 55 55 55 55 55 55 55 55) THEY
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ARE NECCESSARY FOR THE PROGRAM TO WORK
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BUT THEY TAKE UP A LOT OF SPACE. TO
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SOLVE THIS "PROBLEM" I HAVE WRITTEN A
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PROGRAM TO CRAM TOGETHER OTHER PROGRAMS
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AND A PROGRAM TO UNCRAM AND RUN THE
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ORIGINAL PROGRAM. OF COURSE THERE ARE
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MANY VERY COMPLICATED WAYS TO "GET THE
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MOST OUT OF EVERY BYTE" BUT THE WAY I
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CHOSE IS VERY SIMPLE:
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IF THERE IS A REPETITION IT IS STORED
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LIKE THIS:
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1) NUMBER OF REPEATS (UP TO $FF),
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REPEAT VALUE
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OTHERWISE STORE THINGS LIKE THIS:
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2) $00, NUMBER OF UNIQUES (UP TO
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$FFFF), LIST OF UNIQES
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USING THIS METHOD THE ABOVE EXAMPLE
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WOULD LOOK LIKE THIS:
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00 00 03 23 04 59 07 55
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IN THIS SMALL EXAMPLE NOT MUCH WAS
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SAVED BUT IN REAL LIFE HOWEVER I HAVE
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BEEN ABLE TO REDUCE THE SIZE BY 4K TO
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12K DEPENDING ON THE PROGRAM USING THIS
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SIMPLE METHOD!
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THE FOLLOWING TWO PROGRAMS ARE
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RELOCATABLE SO THEY CAN BE RUN ANYWHERE
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YOU WISH. THE FIRST OF THE TWO IS THE
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CRAMMER AND THE SECOND PROGRAM IS THE
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UNCRAMMER.
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TO USE THE CRAMMER JUST:
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1) LOAD THE PROGRAM TO BE CRAMMED
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ALONG WITH THE CRAMMER (AT LEAST
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ONE PAGE ABOVE THE PROGRAM)
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2) ENTER THE FOLLOWING INTO PAGE 0:
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00- PROGRAM START (LSB)
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01- PROGRAM START (MSB)
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02- PROGRAM END (LSB)
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03- PROGRAM END (MSB)
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3) RUN CRAMMER
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4) GET THE FOLLOWING FROM PAGE 0:
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00- CRAMMED START (LSB)
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01- CRAMMED START (MSB)
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02- CRAMMED END (LSB)
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03- CRAMMED END (MSB)
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BEFORE==> PPPPPPPPPPPPP CRAM
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! ! ! !
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DURING==> CCCCCCC ! CRAM
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! ! ! ! ! !
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AFTER===> ! ! ! CCCCCCC CRAM
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! ! ! ! !! ! !
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$0400 ! ! ! !! ! !
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(PROGRAM START) ! ! !! ! !
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$???? ! !! ! !
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(CRAM START) !! ! !
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(PROGRAM END)! ! !
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(CRAM END) (CRAMMER)
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TO USE THE UNCRAMMER JUST:
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1) LOAD CRAMMED PROGRAM AND UNCRAMMER
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RIGHT ABOVE IT
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2) CHANGE THE NOP'S IN UNCRAM TO THE
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FOLLOWING:
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NOP- CRAMMED START (LSB)
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NOP- CRAMMED START (MSB)
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NOP- CRAMMED END (LSB)
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NOP- CRAMMED END (MSB)
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NOP- ORIGINAL PROGRAM START (LSB)
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NOP- ORIGINAL PROGRAM START (MSB)
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3) CHANGE THE JMP $FF69 IN UNCRAM TO
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THE STARTING ADDRESS OF THE
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ORIGINAL PROGRAM.
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4) PUT A JMP $(UNCRAM ADDRESS) BEFORE
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CRAMMED START AND YOUR DONE
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BEFORE===> CCCCCCCC:UNCRAM
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! !
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AFTER====> PPPPPPPPPPPPP!
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! ! !!
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(PROGRAM START) ! !!
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(CRAM START) !!
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(PROGRAM END)!
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(CRAM END)
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AN EXAMPLE:
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CANNONBAL BLITZ-
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MY BLITZ LOADED AT $0800 TO $8FFF
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AND THE STARTING ADDRESS WAS $2900
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I THEN LOADED CRAMMER AT $B000 AND
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TYPED:
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00:00 08 FF 8F
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B000G
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0 <RETURN> <RETURN>
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0000- 77 15 FF 90 (A SAVING OF 3K)
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THE CRAMMED PROGRAM NOW RESIDES AT
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$1577 TO $90FF. I THEN LOADED UNCRAM
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AT $9100 AND TYPED:
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911D:77 15 FF 90 00 08
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913B:4C 00 29
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1574:4C 00 91
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THE NEW BLITZ STARTS AT $1574 AND ENDS
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AT $919C
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THE CRAMMER:
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1000:A0 00 A9 00 85 04 A9 04
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1008:85 0
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5 B1 02 C8 AA E8 8A
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1010:91 02 88 A5 00 85 06 A5
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1018:01 85 07 B1 00 A2 00 85
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1020:0C A5 06 C5 02 D0 18 A5
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1028:07 C5 03 D0 12 8A F0 43
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1030:91 04 E6 04 D0 02 E6 05
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1038:A5 0C 91 04 18 90 7B A5
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1040:0C E6 06 D0 02 E6 07 D1
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1048:06 D0 04 E8 D0 D1 CA 85
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1050:0C 8A C9 06 90 1D 91 04
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1058:E6 04 D0 02 E6 05 A5 0C
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1060:91 04 E6 04 D0 02 E6 05
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1068:A5 06 85 00 A5 07 85 01
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1070:18 90 A0 A9 00 85 0A 85
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1078:0B 91 04 E6 04 D0 02 E6
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1080:05 A5 04 85 08 A5 05 85
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1088:09 E6 04 D0 02 E6 05 E6
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1090:04 D0 02 E6 05 B1 00 91
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1098:04 E6 0A D0 02 E6 0B A5
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10A0:00 C5 02 D0 19 A5 01 C5
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10A8:03 D0 13 A5 0B 91 08 E6
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10B0:08 D0 02 E6 09 A5 0A 91
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10B8:08 18 90 40 90 B3 E6 00
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10C0:D0 02 E6 01 E6 04 D0 02
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10C8:E6 05 A5 00 85 06 A5 01
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10D0:85 07 B1 00 A2 00 E6 06
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10D8:D0 02 E6 07 D1 06 D0 04
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10E0:E8 D0 F3 CA 85 0C 8A C9
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10E8:06 90 AA A5 0B 91 08 E6
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10F0:08 D0 02 E6 09 A5 0A 91
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10F8:08 18 90 C0 E6 03 A5 02
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1100:85 06 A5 03 85 07 B1 04
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1108:91 06 C6 06 A5 06 C9 FF
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1110:D0 02 C6 07 C6 04 A5 04
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1118:C9 FF D0 02 C6 05 A5 04
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1120:C9 FF D0 E2 A5 05 C9 03
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1128:D0 DC E6 06 D0 02 E6 07
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1130:A5 06 85 00 A5 07 85 01
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1138:60
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THE UNCRAMMER:
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2000:20 58 FF BA BD 00 01 85
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2008:07 CA BD 00 01 85 06 A2
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2010:05 A0 20 B1 06 95 00 88
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2018:CA D0 F8 F0 06 EA EA EA
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2020:EA EA EA B1 06 95 00 A0
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2028:00 E6 02 D0 02 E6 03 A5
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2030:00 C5 02 D0 09 A5 01 C5
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2038:03 D0 03 4C 69 FF B1 00
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2040:E6 00 D0 02 E6 01 09 00
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2048:D0 3B B1 00 85 07 E6 00
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2050:D0 02 E6 01 B1 00 85 06
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2058:E6 00 D0 02 E6 01 B1 00
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2060:91 04 E6 00 D0 02 E6 01
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2068:E6 04 D0 02 E6 05 C6 06
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2070:A5 06 C9 FF D0 02 C6 07
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2078:A9 00 C5 07 D0 E0 C5 06
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2080:D0 DC 18 90 AA AA B1 00
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2088:E6 00 D0 02 E6 01 E8 91
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2090:04 E6 04 D0 02 E6 05 CA
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2098:D0 F5 18 90 92
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JOHN
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RAYMONDS
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---------------------------------------
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Enter (1-10, M=Menu, Q=Quit) :
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