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P/CADTXT1
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_23.ADF |
| Filename: | P/CADTXT1 |
| Read OK: | ✔ |
| File size: | 137C bytes |
| Load address: | 43204556 |
| Exec address: | 58544441 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_23.ADF » P/CADTXT1
- Personal collection » Acorn ADFS disks » Greaseweazled » dfs_box04_disk02b_eug_scripts.adf » CAD/CADTXT1
File contents
CIRCUIT DESIGN
~~~~~~~~~~~~~~
by Richard Dimond
Gus sent me a simple CAD program written for the BBC DFS by a friend of
his some time ago and asked me if I could make it work with ADFS at &1D00.
This needed several modifications to save memory and, altough my first
versions worked well, I felt that it was rather limited as there were only
eight preset components. While it was fairly easy to re-define these it
was not possible the add further ones because of the limited memory.
I then thought of using overlays to enable the data for the components to
be changed. This now works well and you can change the data without
losing the drawing that you have already done.
I have made up two DATA files (CD and CD2) which give you a choice of
thirteen components plus three items to modify components. These are all
shown by loading a circuit file named COMPS. This shows the filename and
the key to press for each one.
Should you BREAK out of the program, you must CHAIN it again from the
disc. This is because, after the DATA file is loaded, the value of top$
is altered with the added file and another file is added on top of this
and a BAD MODE error is given.
Thr function keys are used for the following -
f0: Toggle between Text and Graphics modes
f1: Shows the direction in which the component is drawn
f2: Turns the Erase facility ON/OFF
f3: Turns the Link facility ON/OFF
f4: Turns the Node facility ON/OFF
Shift-f5: Clears the screen
f6: LOADs a Circuit file
f7: SAVEs a Circuit file
f8: Dumps to printer
f9: LOADs the DATA files
When the program is first loaded, you will be asked to enter a DATA
filename. The main display screen will then be shown. This shows two
windows. The top window shows the f0 - f4 function key flags and other
messages. The lower is the drawing area.
The flags should show -
Text/Graphics : G
Erase : 0
Link : 0
Node : 0
The compoments represented in each file are shown below together with the
key to press.
File CD File CD2
A Diode Zener Diode
B Op. Amplifier Logic gate
C Transistor Arrow )
D FE Transistor Arrow ) see note below
E Resistor Arrow )
F Condenser Electrolytic Condenser
G Inductor Iron Cored Inductor
H Transformer Iron Cored Transformer
The arrow options C, D & E in file CD2 together with the components can
enable the distinction between NPN and PNP transistors also to set up
variable and preset codensers, resistors and potentiometers by drawing
them over the component.
To link components together, press f3. The link flag will turn to 1. The
link is drawn by the rubber-band drawing procedure. Move the cursor to
the start position and pres COPY. Then move to the end position and press
COPY again. When the linking is finished, press f3 again to turn the
facility off.
To insert a node, press f4. The node flag will turn to 1. Move to the
position required and press COPY and when completed, press f4 again to
return to the drawing mode.
Mistakes can be corrected by pressing F2 to turn on the erase facility and
re-draw the component, line or node at the same position.
The DATA files can be changed using f9 and entering the file name. The
drawing will remain so the all components can be drawn.
Drawings can be SAVEd using f7 and re-LOADed with f6.
New DATA files may be written in similar manner to those included. The
eight components must be allocated to lines 1110 to 1190 in steps 10 and
the first data is Z%, the number of commands, followed by the groups of
three values. The total length the file must be less than &500. This is
the length of the memory reserved between TOP and LOMEM.
WAY BACK IN THE GOOD OLD DAYS BEFORE I GOT INTO COMPUTERS I WAS AN
ELECTRONICS BUFF. LIKE MANY ELECTRONICS BUFFS I SAW COMPUTERS AS A MEANS
OF CONTROLLING MY ELECTRONICS PROJECTS AND DIDN'T REALLY BOTHER TO BUY ONE
SINCE I COULD GET ENOUGH CONTROL WITHOUT ONE.
I GOT MY FIRST COMPUTER, A JUPITER ACE BECAUSE I WANTED TO COMPILE A
DATABASE OF ELECTRONIC CIRCUITS WHICH I HAD A PLENTY BUT COULD NEVER FIND
WHEN I NEEDED ONE. OF COURSE I NEVER DID FIND THE RIGHT SOFTWARE, EVEN
WHEN IT WAS AVAILABLE IT WAS EXPENSIVE OR NOT SUITABLE FOR MY MACHINE.
WHEN I WAS GIVEN THIS PROGRAM RECENTLY MY HEART LITTERLY JUMPED. MY ELK
CAN USE DFS SO THAT WASN'T REALLY A PROBLEM BUT I PASSED IT TO RICHARD SO
THAT EVERYONE CAN USE IT.
NOW I MUST SAY THAT RICHARD HAS DONE US ALL PROUD, YET AGAIN. THE PROGRAM
I SENT HIM COULDN'T PRINTOUT AND HAD ONLY A FEW SYMBOLS. HIS VERSION IS
FIRST CLASS.
00000000 0d 43 49 52 43 55 49 54 20 44 45 53 49 47 4e 0d |.CIRCUIT DESIGN.| 00000010 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0d 62 |~~~~~~~~~~~~~~.b| 00000020 79 20 52 69 63 68 61 72 64 20 44 69 6d 6f 6e 64 |y Richard Dimond| 00000030 0d 0d 47 75 73 1a 20 73 65 6e 74 1a 20 6d 65 1a |..Gus. sent. me.| 00000040 20 61 20 73 69 6d 70 6c 65 20 43 41 44 20 70 72 | a simple CAD pr| 00000050 6f 67 72 61 6d 20 77 72 69 74 74 65 6e 20 66 6f |ogram written fo| 00000060 72 20 74 68 65 20 42 42 43 20 44 46 53 20 62 79 |r the BBC DFS by| 00000070 20 61 20 66 72 69 65 6e 64 20 6f 66 0d 68 69 73 | a friend of.his| 00000080 20 73 6f 6d 65 20 74 69 6d 65 20 61 67 6f 20 61 | some time ago a| 00000090 6e 64 20 61 73 6b 65 64 20 6d 65 20 69 66 20 49 |nd asked me if I| 000000a0 20 63 6f 75 6c 64 20 6d 61 6b 65 20 69 74 20 77 | could make it w| 000000b0 6f 72 6b 20 77 69 74 68 20 41 44 46 53 20 61 74 |ork with ADFS at| 000000c0 20 26 31 44 30 30 2e 0d 0d 54 68 69 73 20 6e 65 | &1D00...This ne| 000000d0 65 64 65 64 20 73 65 76 65 72 61 6c 20 6d 6f 64 |eded several mod| 000000e0 69 66 69 63 61 74 69 6f 6e 73 20 74 6f 1a 20 73 |ifications to. s| 000000f0 61 76 65 1a 20 6d 65 6d 6f 72 79 1a 20 61 6e 64 |ave. memory. and| 00000100 2c 1a 20 61 6c 74 6f 75 67 68 20 6d 79 20 66 69 |,. altough my fi| 00000110 72 73 74 0d 76 65 72 73 69 6f 6e 73 20 77 6f 72 |rst.versions wor| 00000120 6b 65 64 20 77 65 6c 6c 2c 20 49 20 66 65 6c 74 |ked well, I felt| 00000130 20 74 68 61 74 20 69 74 20 77 61 73 20 72 61 74 | that it was rat| 00000140 68 65 72 20 6c 69 6d 69 74 65 64 20 61 73 20 74 |her limited as t| 00000150 68 65 72 65 20 77 65 72 65 20 6f 6e 6c 79 0d 65 |here were only.e| 00000160 69 67 68 74 20 70 72 65 73 65 74 20 63 6f 6d 70 |ight preset comp| 00000170 6f 6e 65 6e 74 73 2e 20 20 57 68 69 6c 65 20 69 |onents. While i| 00000180 74 20 77 61 73 20 66 61 69 72 6c 79 20 65 61 73 |t was fairly eas| 00000190 79 20 74 6f 1a 20 72 65 2d 64 65 66 69 6e 65 1a |y to. re-define.| 000001a0 20 74 68 65 73 65 20 69 74 0d 77 61 73 20 6e 6f | these it.was no| 000001b0 74 20 70 6f 73 73 69 62 6c 65 20 74 68 65 20 61 |t possible the a| 000001c0 64 64 20 66 75 72 74 68 65 72 20 6f 6e 65 73 20 |dd further ones | 000001d0 62 65 63 61 75 73 65 20 6f 66 20 74 68 65 20 6c |because of the l| 000001e0 69 6d 69 74 65 64 20 6d 65 6d 6f 72 79 2e 0d 0d |imited memory...| 000001f0 49 20 74 68 65 6e 20 74 68 6f 75 67 68 74 20 6f |I then thought o| 00000200 66 20 75 73 69 6e 67 20 6f 76 65 72 6c 61 79 73 |f using overlays| 00000210 20 74 6f 20 65 6e 61 62 6c 65 20 74 68 65 20 64 | to enable the d| 00000220 61 74 61 20 66 6f 72 1a 20 74 68 65 20 63 6f 6d |ata for. the com| 00000230 70 6f 6e 65 6e 74 73 20 74 6f 0d 62 65 1a 20 63 |ponents to.be. c| 00000240 68 61 6e 67 65 64 2e 1a 20 20 54 68 69 73 1a 20 |hanged.. This. | 00000250 6e 6f 77 1a 20 77 6f 72 6b 73 1a 20 77 65 6c 6c |now. works. well| 00000260 1a 20 61 6e 64 20 79 6f 75 20 63 61 6e 20 63 68 |. and you can ch| 00000270 61 6e 67 65 20 74 68 65 20 64 61 74 61 20 77 69 |ange the data wi| 00000280 74 68 6f 75 74 0d 6c 6f 73 69 6e 67 20 74 68 65 |thout.losing the| 00000290 20 64 72 61 77 69 6e 67 20 74 68 61 74 20 79 6f | drawing that yo| 000002a0 75 20 68 61 76 65 20 61 6c 72 65 61 64 79 20 64 |u have already d| 000002b0 6f 6e 65 2e 0d 0d 49 20 68 61 76 65 20 6d 61 64 |one...I have mad| 000002c0 65 20 75 70 20 74 77 6f 1a 20 44 41 54 41 1a 20 |e up two. DATA. | 000002d0 66 69 6c 65 73 1a 20 28 43 44 1a 20 61 6e 64 1a |files. (CD. and.| 000002e0 20 43 44 32 29 20 77 68 69 63 68 20 67 69 76 65 | CD2) which give| 000002f0 20 79 6f 75 20 61 20 63 68 6f 69 63 65 20 6f 66 | you a choice of| 00000300 0d 74 68 69 72 74 65 65 6e 1a 20 63 6f 6d 70 6f |.thirteen. compo| 00000310 6e 65 6e 74 73 20 70 6c 75 73 20 74 68 72 65 65 |nents plus three| 00000320 20 69 74 65 6d 73 20 74 6f 20 6d 6f 64 69 66 79 | items to modify| 00000330 20 63 6f 6d 70 6f 6e 65 6e 74 73 2e 20 20 54 68 | components. Th| 00000340 65 73 65 20 61 72 65 20 61 6c 6c 0d 73 68 6f 77 |ese are all.show| 00000350 6e 20 62 79 20 6c 6f 61 64 69 6e 67 20 61 20 63 |n by loading a c| 00000360 69 72 63 75 69 74 1a 20 66 69 6c 65 20 6e 61 6d |ircuit. file nam| 00000370 65 64 20 43 4f 4d 50 53 2e 20 20 54 68 69 73 20 |ed COMPS. This | 00000380 73 68 6f 77 73 20 74 68 65 20 66 69 6c 65 6e 61 |shows the filena| 00000390 6d 65 20 61 6e 64 0d 74 68 65 20 6b 65 79 20 74 |me and.the key t| 000003a0 6f 20 70 72 65 73 73 20 66 6f 72 20 65 61 63 68 |o press for each| 000003b0 20 6f 6e 65 2e 0d 0d 53 68 6f 75 6c 64 20 79 6f | one...Should yo| 000003c0 75 20 42 52 45 41 4b 20 6f 75 74 20 6f 66 20 74 |u BREAK out of t| 000003d0 68 65 20 70 72 6f 67 72 61 6d 2c 20 79 6f 75 1a |he program, you.| 000003e0 20 6d 75 73 74 1a 20 43 48 41 49 4e 1a 20 69 74 | must. CHAIN. it| 000003f0 1a 20 61 67 61 69 6e 1a 20 66 72 6f 6d 20 74 68 |. again. from th| 00000400 65 0d 64 69 73 63 2e 1a 1a 20 20 54 68 69 73 20 |e.disc... This | 00000410 69 73 20 62 65 63 61 75 73 65 2c 20 61 66 74 65 |is because, afte| 00000420 72 20 74 68 65 20 44 41 54 41 20 66 69 6c 65 20 |r the DATA file | 00000430 69 73 20 6c 6f 61 64 65 64 2c 20 74 68 65 20 76 |is loaded, the v| 00000440 61 6c 75 65 20 6f 66 20 74 6f 70 24 0d 69 73 20 |alue of top$.is | 00000450 61 6c 74 65 72 65 64 1a 20 77 69 74 68 1a 20 74 |altered. with. t| 00000460 68 65 1a 20 61 64 64 65 64 20 66 69 6c 65 20 61 |he. added file a| 00000470 6e 64 20 61 6e 6f 74 68 65 72 20 66 69 6c 65 20 |nd another file | 00000480 69 73 20 61 64 64 65 64 20 6f 6e 20 74 6f 70 20 |is added on top | 00000490 6f 66 20 74 68 69 73 0d 61 6e 64 20 61 20 42 41 |of this.and a BA| 000004a0 44 20 4d 4f 44 45 20 65 72 72 6f 72 20 69 73 20 |D MODE error is | 000004b0 67 69 76 65 6e 2e 0d 0d 54 68 72 20 66 75 6e 63 |given...Thr func| 000004c0 74 69 6f 6e 20 6b 65 79 73 20 61 72 65 20 75 73 |tion keys are us| 000004d0 65 64 20 66 6f 72 20 74 68 65 20 66 6f 6c 6c 6f |ed for the follo| 000004e0 77 69 6e 67 20 2d 0d 20 20 20 20 20 20 0d 20 20 |wing -. . | 000004f0 20 20 20 20 66 30 3a 20 20 20 54 6f 67 67 6c 65 | f0: Toggle| 00000500 20 62 65 74 77 65 65 6e 20 54 65 78 74 20 61 6e | between Text an| 00000510 64 20 47 72 61 70 68 69 63 73 20 6d 6f 64 65 73 |d Graphics modes| 00000520 0d 20 20 20 20 20 20 66 31 3a 20 20 20 53 68 6f |. f1: Sho| 00000530 77 73 20 74 68 65 20 64 69 72 65 63 74 69 6f 6e |ws the direction| 00000540 20 69 6e 20 77 68 69 63 68 20 74 68 65 20 63 6f | in which the co| 00000550 6d 70 6f 6e 65 6e 74 20 69 73 20 64 72 61 77 6e |mponent is drawn| 00000560 0d 20 20 20 20 20 20 66 32 3a 20 20 20 54 75 72 |. f2: Tur| 00000570 6e 73 20 74 68 65 20 45 72 61 73 65 20 66 61 63 |ns the Erase fac| 00000580 69 6c 69 74 79 20 4f 4e 2f 4f 46 46 0d 20 20 20 |ility ON/OFF. | 00000590 20 20 20 66 33 3a 20 20 20 54 75 72 6e 73 20 74 | f3: Turns t| 000005a0 68 65 20 4c 69 6e 6b 20 66 61 63 69 6c 69 74 79 |he Link facility| 000005b0 20 4f 4e 2f 4f 46 46 0d 20 20 20 20 20 20 66 34 | ON/OFF. f4| 000005c0 3a 20 20 20 54 75 72 6e 73 20 74 68 65 20 4e 6f |: Turns the No| 000005d0 64 65 20 66 61 63 69 6c 69 74 79 20 4f 4e 2f 4f |de facility ON/O| 000005e0 46 46 0d 53 68 69 66 74 2d 66 35 3a 20 20 20 43 |FF.Shift-f5: C| 000005f0 6c 65 61 72 73 20 74 68 65 20 73 63 72 65 65 6e |lears the screen| 00000600 0d 20 20 20 20 20 20 66 36 3a 20 20 20 4c 4f 41 |. f6: LOA| 00000610 44 73 20 61 20 43 69 72 63 75 69 74 20 66 69 6c |Ds a Circuit fil| 00000620 65 0d 20 20 20 20 20 20 66 37 3a 20 20 20 53 41 |e. f7: SA| 00000630 56 45 73 20 61 20 43 69 72 63 75 69 74 20 66 69 |VEs a Circuit fi| 00000640 6c 65 0d 20 20 20 20 20 20 66 38 3a 20 20 20 44 |le. f8: D| 00000650 75 6d 70 73 20 74 6f 20 70 72 69 6e 74 65 72 0d |umps to printer.| 00000660 20 20 20 20 20 20 66 39 3a 20 20 20 4c 4f 41 44 | f9: LOAD| 00000670 73 20 74 68 65 20 44 41 54 41 20 66 69 6c 65 73 |s the DATA files| 00000680 0d 0d 57 68 65 6e 1a 20 74 68 65 1a 20 70 72 6f |..When. the. pro| 00000690 67 72 61 6d 1a 20 69 73 1a 20 66 69 72 73 74 1a |gram. is. first.| 000006a0 20 6c 6f 61 64 65 64 2c 1a 20 79 6f 75 1a 20 77 | loaded,. you. w| 000006b0 69 6c 6c 20 62 65 20 61 73 6b 65 64 20 74 6f 20 |ill be asked to | 000006c0 65 6e 74 65 72 20 61 20 44 41 54 41 0d 66 69 6c |enter a DATA.fil| 000006d0 65 6e 61 6d 65 2e 20 20 54 68 65 20 6d 61 69 6e |ename. The main| 000006e0 20 64 69 73 70 6c 61 79 20 73 63 72 65 65 6e 20 | display screen | 000006f0 77 69 6c 6c 20 74 68 65 6e 20 62 65 1a 20 73 68 |will then be. sh| 00000700 6f 77 6e 2e 1a 20 20 54 68 69 73 1a 20 73 68 6f |own.. This. sho| 00000710 77 73 1a 20 74 77 6f 0d 77 69 6e 64 6f 77 73 2e |ws. two.windows.| 00000720 1a 20 54 68 65 1a 20 74 6f 70 1a 20 77 69 6e 64 |. The. top. wind| 00000730 6f 77 1a 20 73 68 6f 77 73 20 74 68 65 20 66 30 |ow. shows the f0| 00000740 20 2d 20 66 34 20 66 75 6e 63 74 69 6f 6e 20 6b | - f4 function k| 00000750 65 79 20 66 6c 61 67 73 20 61 6e 64 20 6f 74 68 |ey flags and oth| 00000760 65 72 0d 6d 65 73 73 61 67 65 73 2e 20 20 54 68 |er.messages. Th| 00000770 65 20 6c 6f 77 65 72 20 69 73 20 74 68 65 20 64 |e lower is the d| 00000780 72 61 77 69 6e 67 20 61 72 65 61 2e 0d 0d 54 68 |rawing area...Th| 00000790 65 20 66 6c 61 67 73 20 73 68 6f 75 6c 64 20 73 |e flags should s| 000007a0 68 6f 77 20 2d 0d 0d 20 20 20 20 20 20 20 54 65 |how -.. Te| 000007b0 78 74 2f 47 72 61 70 68 69 63 73 20 3a 20 47 0d |xt/Graphics : G.| 000007c0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 45 | E| 000007d0 72 61 73 65 20 3a 20 30 0d 20 20 20 20 20 20 20 |rase : 0. | 000007e0 20 20 20 20 20 20 20 20 20 4c 69 6e 6b 20 3a 20 | Link : | 000007f0 30 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |0. | 00000800 20 20 4e 6f 64 65 20 3a 20 30 0d 0d 54 68 65 20 | Node : 0..The | 00000810 63 6f 6d 70 6f 6d 65 6e 74 73 20 72 65 70 72 65 |compoments repre| 00000820 73 65 6e 74 65 64 20 69 6e 20 65 61 63 68 20 66 |sented in each f| 00000830 69 6c 65 1a 20 61 72 65 20 73 68 6f 77 6e 20 62 |ile. are shown b| 00000840 65 6c 6f 77 20 74 6f 67 65 74 68 65 72 20 77 69 |elow together wi| 00000850 74 68 20 74 68 65 0d 6b 65 79 20 20 74 6f 20 70 |th the.key to p| 00000860 72 65 73 73 2e 0d 20 20 20 20 20 20 20 20 20 20 |ress.. | 00000870 20 20 0d 20 20 20 20 20 20 20 20 20 46 69 6c 65 | . File| 00000880 20 20 43 44 20 20 20 20 20 20 20 20 20 20 20 20 | CD | 00000890 20 20 20 20 20 20 20 20 20 20 20 46 69 6c 65 20 | File | 000008a0 43 44 32 0d 20 20 41 20 20 20 20 20 20 44 69 6f |CD2. A Dio| 000008b0 64 65 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |de | 000008c0 20 20 20 20 20 20 20 20 20 20 20 20 5a 65 6e 65 | Zene| 000008d0 72 20 44 69 6f 64 65 0d 20 20 42 20 20 20 20 20 |r Diode. B | 000008e0 20 4f 70 2e 20 41 6d 70 6c 69 66 69 65 72 20 20 | Op. Amplifier | 000008f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000900 4c 6f 67 69 63 20 67 61 74 65 0d 20 20 43 20 20 |Logic gate. C | 00000910 20 20 20 20 54 72 61 6e 73 69 73 74 6f 72 20 20 | Transistor | 00000920 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000930 20 20 20 41 72 72 6f 77 20 20 29 20 20 20 20 20 | Arrow ) | 00000940 20 20 20 20 20 20 20 20 20 20 0d 20 20 44 20 20 | . D | 00000950 20 20 20 20 46 45 20 54 72 61 6e 73 69 73 74 6f | FE Transisto| 00000960 72 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |r | 00000970 20 20 20 41 72 72 6f 77 20 20 29 20 73 65 65 20 | Arrow ) see | 00000980 6e 6f 74 65 20 62 65 6c 6f 77 0d 20 20 45 20 20 |note below. E | 00000990 20 20 20 20 52 65 73 69 73 74 6f 72 20 20 20 20 | Resistor | 000009a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000009b0 20 20 20 41 72 72 6f 77 20 20 29 0d 20 20 46 20 | Arrow ). F | 000009c0 20 20 20 20 20 43 6f 6e 64 65 6e 73 65 72 20 20 | Condenser | 000009d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000009e0 20 20 20 20 45 6c 65 63 74 72 6f 6c 79 74 69 63 | Electrolytic| 000009f0 20 43 6f 6e 64 65 6e 73 65 72 0d 20 20 47 20 20 | Condenser. G | 00000a00 20 20 20 20 49 6e 64 75 63 74 6f 72 20 20 20 20 | Inductor | 00000a10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000a20 20 20 20 49 72 6f 6e 20 43 6f 72 65 64 20 49 6e | Iron Cored In| 00000a30 64 75 63 74 6f 72 0d 20 20 48 20 20 20 20 20 20 |ductor. H | 00000a40 54 72 61 6e 73 66 6f 72 6d 65 72 20 20 20 20 20 |Transformer | 00000a50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 49 | I| 00000a60 72 6f 6e 20 43 6f 72 65 64 20 54 72 61 6e 73 66 |ron Cored Transf| 00000a70 6f 72 6d 65 72 0d 0d 54 68 65 20 61 72 72 6f 77 |ormer..The arrow| 00000a80 20 6f 70 74 69 6f 6e 73 20 43 2c 20 44 20 26 20 | options C, D & | 00000a90 45 20 69 6e 20 66 69 6c 65 1a 20 43 44 32 1a 20 |E in file. CD2. | 00000aa0 74 6f 67 65 74 68 65 72 1a 20 77 69 74 68 20 74 |together. with t| 00000ab0 68 65 20 63 6f 6d 70 6f 6e 65 6e 74 73 20 63 61 |he components ca| 00000ac0 6e 0d 65 6e 61 62 6c 65 20 74 68 65 20 64 69 73 |n.enable the dis| 00000ad0 74 69 6e 63 74 69 6f 6e 20 62 65 74 77 65 65 6e |tinction between| 00000ae0 20 4e 50 4e 1a 20 61 6e 64 1a 20 50 4e 50 1a 20 | NPN. and. PNP. | 00000af0 74 72 61 6e 73 69 73 74 6f 72 73 1a 20 61 6c 73 |transistors. als| 00000b00 6f 1a 20 74 6f 20 73 65 74 20 75 70 0d 76 61 72 |o. to set up.var| 00000b10 69 61 62 6c 65 1a 20 61 6e 64 1a 20 70 72 65 73 |iable. and. pres| 00000b20 65 74 1a 20 63 6f 64 65 6e 73 65 72 73 2c 1a 20 |et. codensers,. | 00000b30 72 65 73 69 73 74 6f 72 73 20 61 6e 64 20 70 6f |resistors and po| 00000b40 74 65 6e 74 69 6f 6d 65 74 65 72 73 20 62 79 20 |tentiometers by | 00000b50 64 72 61 77 69 6e 67 0d 74 68 65 6d 20 6f 76 65 |drawing.them ove| 00000b60 72 20 74 68 65 20 63 6f 6d 70 6f 6e 65 6e 74 2e |r the component.| 00000b70 0d 0d 54 6f 20 6c 69 6e 6b 20 63 6f 6d 70 6f 6e |..To link compon| 00000b80 65 6e 74 73 20 74 6f 67 65 74 68 65 72 2c 20 70 |ents together, p| 00000b90 72 65 73 73 20 66 33 2e 20 20 54 68 65 20 6c 69 |ress f3. The li| 00000ba0 6e 6b 20 66 6c 61 67 20 77 69 6c 6c 20 74 75 72 |nk flag will tur| 00000bb0 6e 20 74 6f 20 31 2e 20 20 54 68 65 0d 6c 69 6e |n to 1. The.lin| 00000bc0 6b 20 69 73 20 64 72 61 77 6e 20 62 79 20 74 68 |k is drawn by th| 00000bd0 65 20 72 75 62 62 65 72 2d 62 61 6e 64 20 64 72 |e rubber-band dr| 00000be0 61 77 69 6e 67 1a 20 70 72 6f 63 65 64 75 72 65 |awing. procedure| 00000bf0 2e 1a 20 20 4d 6f 76 65 1a 20 74 68 65 20 63 75 |.. Move. the cu| 00000c00 72 73 6f 72 20 74 6f 0d 74 68 65 20 73 74 61 72 |rsor to.the star| 00000c10 74 20 70 6f 73 69 74 69 6f 6e 20 61 6e 64 20 70 |t position and p| 00000c20 72 65 73 20 43 4f 50 59 2e 20 54 68 65 6e 20 6d |res COPY. Then m| 00000c30 6f 76 65 20 74 6f 20 74 68 65 1a 20 65 6e 64 20 |ove to the. end | 00000c40 70 6f 73 69 74 69 6f 6e 20 61 6e 64 20 70 72 65 |position and pre| 00000c50 73 73 0d 43 4f 50 59 1a 20 61 67 61 69 6e 2e 1a |ss.COPY. again..| 00000c60 20 20 57 68 65 6e 1a 20 74 68 65 20 6c 69 6e 6b | When. the link| 00000c70 69 6e 67 20 69 73 20 66 69 6e 69 73 68 65 64 2c |ing is finished,| 00000c80 20 70 72 65 73 73 20 66 33 20 61 67 61 69 6e 20 | press f3 again | 00000c90 74 6f 1a 20 74 75 72 6e 1a 20 74 68 65 0d 66 61 |to. turn. the.fa| 00000ca0 63 69 6c 69 74 79 20 6f 66 66 2e 0d 0d 54 6f 20 |cility off...To | 00000cb0 69 6e 73 65 72 74 20 61 20 6e 6f 64 65 2c 1a 20 |insert a node,. | 00000cc0 70 72 65 73 73 1a 20 66 34 2e 1a 20 20 54 68 65 |press. f4.. The| 00000cd0 20 6e 6f 64 65 20 66 6c 61 67 20 77 69 6c 6c 20 | node flag will | 00000ce0 74 75 72 6e 20 74 6f 20 31 2e 20 20 4d 6f 76 65 |turn to 1. Move| 00000cf0 20 74 6f 20 74 68 65 0d 70 6f 73 69 74 69 6f 6e | to the.position| 00000d00 20 72 65 71 75 69 72 65 64 20 61 6e 64 20 70 72 | required and pr| 00000d10 65 73 73 20 43 4f 50 59 20 61 6e 64 20 77 68 65 |ess COPY and whe| 00000d20 6e 1a 20 63 6f 6d 70 6c 65 74 65 64 2c 1a 20 70 |n. completed,. p| 00000d30 72 65 73 73 1a 20 66 34 1a 20 61 67 61 69 6e 20 |ress. f4. again | 00000d40 74 6f 0d 72 65 74 75 72 6e 20 74 6f 20 74 68 65 |to.return to the| 00000d50 20 64 72 61 77 69 6e 67 20 6d 6f 64 65 2e 0d 0d | drawing mode...| 00000d60 4d 69 73 74 61 6b 65 73 20 63 61 6e 20 62 65 20 |Mistakes can be | 00000d70 63 6f 72 72 65 63 74 65 64 20 62 79 20 70 72 65 |corrected by pre| 00000d80 73 73 69 6e 67 20 46 32 20 74 6f 20 74 75 72 6e |ssing F2 to turn| 00000d90 20 6f 6e 20 74 68 65 20 65 72 61 73 65 20 66 61 | on the erase fa| 00000da0 63 69 6c 69 74 79 20 61 6e 64 0d 72 65 2d 64 72 |cility and.re-dr| 00000db0 61 77 20 74 68 65 20 63 6f 6d 70 6f 6e 65 6e 74 |aw the component| 00000dc0 2c 20 6c 69 6e 65 20 6f 72 20 6e 6f 64 65 20 61 |, line or node a| 00000dd0 74 20 74 68 65 20 73 61 6d 65 20 70 6f 73 69 74 |t the same posit| 00000de0 69 6f 6e 2e 0d 0d 54 68 65 20 44 41 54 41 20 66 |ion...The DATA f| 00000df0 69 6c 65 73 20 63 61 6e 20 62 65 20 63 68 61 6e |iles can be chan| 00000e00 67 65 64 20 75 73 69 6e 67 20 66 39 20 61 6e 64 |ged using f9 and| 00000e10 20 65 6e 74 65 72 69 6e 67 20 74 68 65 1a 20 66 | entering the. f| 00000e20 69 6c 65 1a 20 6e 61 6d 65 2e 1a 20 20 54 68 65 |ile. name.. The| 00000e30 0d 64 72 61 77 69 6e 67 20 77 69 6c 6c 20 72 65 |.drawing will re| 00000e40 6d 61 69 6e 20 73 6f 20 74 68 65 20 61 6c 6c 20 |main so the all | 00000e50 63 6f 6d 70 6f 6e 65 6e 74 73 20 63 61 6e 20 62 |components can b| 00000e60 65 20 64 72 61 77 6e 2e 0d 0d 44 72 61 77 69 6e |e drawn...Drawin| 00000e70 67 73 20 63 61 6e 20 62 65 20 53 41 56 45 64 20 |gs can be SAVEd | 00000e80 75 73 69 6e 67 20 66 37 20 61 6e 64 20 72 65 2d |using f7 and re-| 00000e90 4c 4f 41 44 65 64 20 77 69 74 68 20 66 36 2e 0d |LOADed with f6..| 00000ea0 0d 4e 65 77 1a 20 44 41 54 41 1a 20 66 69 6c 65 |.New. DATA. file| 00000eb0 73 1a 20 6d 61 79 20 62 65 20 77 72 69 74 74 65 |s. may be writte| 00000ec0 6e 20 69 6e 20 73 69 6d 69 6c 61 72 20 6d 61 6e |n in similar man| 00000ed0 6e 65 72 20 74 6f 20 74 68 6f 73 65 20 69 6e 63 |ner to those inc| 00000ee0 6c 75 64 65 64 2e 20 20 54 68 65 0d 65 69 67 68 |luded. The.eigh| 00000ef0 74 20 63 6f 6d 70 6f 6e 65 6e 74 73 20 6d 75 73 |t components mus| 00000f00 74 20 62 65 1a 20 61 6c 6c 6f 63 61 74 65 64 1a |t be. allocated.| 00000f10 20 74 6f 20 6c 69 6e 65 73 20 31 31 31 30 20 74 | to lines 1110 t| 00000f20 6f 20 31 31 39 30 20 69 6e 20 73 74 65 70 73 20 |o 1190 in steps | 00000f30 31 30 20 61 6e 64 0d 74 68 65 20 66 69 72 73 74 |10 and.the first| 00000f40 20 64 61 74 61 20 69 73 20 5a 25 2c 20 74 68 65 | data is Z%, the| 00000f50 1a 20 6e 75 6d 62 65 72 1a 20 6f 66 1a 20 63 6f |. number. of. co| 00000f60 6d 6d 61 6e 64 73 2c 20 66 6f 6c 6c 6f 77 65 64 |mmands, followed| 00000f70 20 62 79 20 74 68 65 20 67 72 6f 75 70 73 20 6f | by the groups o| 00000f80 66 0d 74 68 72 65 65 20 76 61 6c 75 65 73 2e 20 |f.three values. | 00000f90 20 54 68 65 20 74 6f 74 61 6c 20 6c 65 6e 67 74 | The total lengt| 00000fa0 68 20 74 68 65 20 66 69 6c 65 1a 20 6d 75 73 74 |h the file. must| 00000fb0 20 62 65 20 6c 65 73 73 20 74 68 61 6e 20 26 35 | be less than &5| 00000fc0 30 30 2e 20 20 54 68 69 73 20 69 73 0d 74 68 65 |00. 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MY| 00001270 20 45 4c 4b 0d 43 41 4e 20 55 53 45 20 44 46 53 | ELK.CAN USE DFS| 00001280 20 53 4f 20 54 48 41 54 20 57 41 53 4e 27 54 20 | SO THAT WASN'T | 00001290 52 45 41 4c 4c 59 20 41 20 50 52 4f 42 4c 45 4d |REALLY A PROBLEM| 000012a0 20 42 55 54 20 49 20 50 41 53 53 45 44 20 49 54 | BUT I PASSED IT| 000012b0 20 54 4f 20 52 49 43 48 41 52 44 20 53 4f 0d 54 | TO RICHARD SO.T| 000012c0 48 41 54 20 45 56 45 52 59 4f 4e 45 20 43 41 4e |HAT EVERYONE CAN| 000012d0 20 55 53 45 20 49 54 2e 20 0d 0d 4e 4f 57 20 49 | USE IT. ..NOW I| 000012e0 20 4d 55 53 54 20 53 41 59 20 54 48 41 54 20 52 | MUST SAY THAT R| 000012f0 49 43 48 41 52 44 20 48 41 53 20 44 4f 4e 45 20 |ICHARD HAS DONE | 00001300 55 53 20 41 4c 4c 20 50 52 4f 55 44 2c 20 59 45 |US ALL PROUD, YE| 00001310 54 20 41 47 41 49 4e 2e 20 54 48 45 20 50 52 4f |T AGAIN. 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