This is a list of things I can talk about at the FORTH meeting on 22nd Sept.
Graphical proof of pythagorean theorem
Graphical proof Area of a circle is Pi(r^2)
Tools needed for Assembly Language programming.
An Assembler (I like A86 by Eric Isaacson)
A description of the processor instructions
A description of the operating system functions
Several tools such as:
A good editor (I customized SemWare's Junior Editor under DOS
Worth it just for the spelling checker)
A Debug facility (DEBUG comes with MicroSoft Windows ??)
A File Dump routine (Include my DUMP.COM)
A File Compare program (SUPERC contact me about)
A program to read the computer clock (for timing)
Programs I want to use or demonstrate:
DT Prints Date & Time optional text after DT on command line
HELLO
PAN Phone Alpha to telephone number
SX & SXS Sequence Extender (SXS shows steps--more for debugging.)
NP3 New Prime number generator--uses 386 32-bit registers.
Features:
Outputs 1 byte for each prime
Use KCHAR and DUMP to show.
Don't test multiples of 2 or 3
P & Q Tables
DS and ES are separate 64K Segments. SS is 1000 bytes higher
For speed Q is in ES & P in DS at same address
The first 4000 hex bytes of ES is the output buffer
Put value being tested at top of Q
Don't need low order bit
At any point in time the high bits are all the same
PPN Print Prime Numbers to display in decimal, variable number of columns.
PGC Print the Count of Gaps between consecutive primes
PPT Print Prime Twins (only the last of the two)
KCHAR (Keeps first n characters of a file)
DUMP (Displays a file in Hex and ASCII)
Directory of my prime programs as of:
2007-09-20 Ordered by Size
HELLO COM 21 01-10-29 15.49
PAN COM 82 04-05-19 19.01
KCHAR COM 342 93-11-19 11.24
DT COM 394 98-11-01 15.53
PGC COM 402 07-09-20 11.51
PPN COM 572 07-08-23 20.40
PPT COM 576 07-08-29 16.59
DUMP COM 576 01-12-02 9.23
SXS COM 702 02-08-21 18.17
SX COM 704 02-08-21 18.14
NP3 COM 884 07-09-04 6.32
11 file(s) 5 255 bytes
--------------------------------
Quick notes added to help with programs.
To get "tiny help" TYPE any of the .com files except: HELLO.COM & PAN.COM
The .8 and .S8 files are source , however I use ` names to drop in
"boiler-plate" to help understand it a little better I have included
PGC.8 which has everything expanded.
A86 allows local labels, which can be re-used. They are a single letter
followed by a number. A forward reference is preceded with a > without
it it is a backward reference.
Lastly here is a directory of what is in the .ZIP file ordered by extension.
-------------------------------------------
PKUNZIP (R) FAST! Extract Utility Version 2.04g 02-01-93
Copr. 1989-1993 PKWARE Inc. All Rights Reserved. Registered version
PKUNZIP Reg. U.S. Pat. and Tm. Off.
þ 80486 CPU detected.
þ EMS version 4.00 detected.
þ XMS version 3.00 detected.
þ DPMI version 0.90 detected.
Searching ZIP: FORTH.ZIP
Length Method Size Ratio Date Time Name
------ ------ ----- ----- ---- ---- ----
88 DeflatN 81 8% 09-21-05 08:39 HELLO.8
859 DeflatN 553 36% 09-21-05 08:41 PAN.8
5002 DeflatN 2407 52% 09-25-07 11:54 PGC.8
394 Stored 394 0% 11-01-98 15:53 DT.COM
576 DeflatN 541 7% 12-02-01 09:23 DUMP.COM
21 Stored 21 0% 10-29-01 15:49 HELLO.COM
342 Stored 342 0% 11-19-93 11:24 KCHAR.COM
918 DeflatN 831 10% 10-01-07 10:32 NP3.COM
82 Stored 82 0% 05-19-04 19:01 PAN.COM
402 Stored 402 0% 09-20-07 11:51 PGC.COM
572 DeflatN 559 3% 08-23-07 20:40 PPN.COM
576 DeflatN 561 3% 08-29-07 16:59 PPT.COM
704 DeflatN 667 6% 08-21-02 18:14 SX.COM
702 DeflatN 664 6% 08-21-02 18:17 SXS.COM
6180 DeflatN 2820 55% 10-01-07 10:19 NP3.S8
2748 DeflatN 1387 50% 09-20-07 11:51 PGC.S8
4309 DeflatN 1976 55% 08-23-07 20:40 PPN.S8
------ ------ --- -------
24475 14288 42% 17
Since the talk I have made a few enhancements to NP3 (to make it display the same character until it has extended the Q-table 256 times, and doubled the size of primes it can output.) and possibly PPN.
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