Cayley's Ω process: Difference between revisions

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{{ Infobox Calculator
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| name        = CASIO FX-602P series
| image        = CASIO FX-602P Programmable Calculator.png
| caption      = A 28 year old FX-602P in working condition
| type        = [[Programmable calculator|Programmable]] [[Scientific calculator|Scientific]]
| entry        =[[Calculator_input_methods#Infix_notation|Infix]]
| introduced  = 1981
| discontinued = 1989
| manufacturer = [[Casio]]
| precision    = 12 digits mantissa, ±99 exponent
| display_type = [[Liquid crystal display|LCD]] [[Dot-matrix]]
| display_size = 11 Characters + 3 digits
| prog_lang    = [[Keystroke programmable|Keystroke]] <small>(fully merged, [[Turing completeness|Turing complete]])</small>
| memory_data = 11 <small>(FX-601P)</small> 22 .. 88 <small>(FX-602P)</small>
| memory_step = 128 <small>(FX-601P)</small> 32 .. 512 <small>(FX-602P)</small>
| conn1        = [[Compact Cassette]]
| via1_1      = [[Casio FA-1|FA-1]]
| via1_2      = [[Casio FA-2|FA-2]]
| conn2        = [[Casio FP-10|FP-10]] [[Thermal printer]]
| via2_1      = Direct
| via2_2      = [[Casio FA-2|FA-2]]
| ports        = one vendor specific
| supply      = 2×"CR-2032" Lithium
| weight      = 141g, 5 oz
| dimensions  = 15.24x7,6x1.2 cm, 6"×3"×½"
}}
 
The '''FX-601P''' and '''FX-602P''' were [[programmable calculator]]s, manufactured by [[CASIO]] from 1981. It was the successor model to the [[Casio FX-502P series]] and was itself succeeded in 1990 by the [[Casio FX-603P]].
 
==Display==
The '''FX-601P series''' featured a single line dot matrix display with 11 characters as main display. An additional 3 digits 7-segment display used to display exponents as well as program steps when entering or debugging programs. There were 11 status indicators.
 
==Programming==
The programming model employed ''key stroke'' programming by which each key pressed was recorded and later played back. On record, multiple key presses were merged into a single programming step. Only a few operations needed two bytes.<ref>Martin Krischik [http://fx-602p.krischik.com/index.php/Main/TokenCodes FX-602P Token list] [http://krischik.com Martin Krischik Software Development].</ref> [[Synthetic programming]] was possible but not very common<ref>Dr. K. Miyahara, (2008) [http://www.asahi-net.or.jp/~ey5k-myhr/fx602p_e.htm#tech Synthetic Programming on the FX-602P].</ref>
 
The '''FX-601P''' could store 128 fully merged steps and data could be stored in 11 memory register. The memory of the '''FX-602P''' could be partitioned  between from 32 to 512 fully merged steps and data could be stored in 22 to 88 memory register. The default set-up was 22 register and 512 steps. From there one could trade 8 steps for one additional register or 80 steps for 11 register with the 11th register begin a so-called "F" register.
 
Like its predecessor the FX-602P series supported 10 labels for programs and subroutines called P0 .. P9. Each program or subroutine could have up to 10 local labels called LBL0 .. LBL9 for jumps and branches.
 
The '''FX-601P''' and '''FX-602P''' supported [[Addressing_mode#Memory_indirect|indirect]] addressing both for memory access and jumps and therefore  programming model could be considered [[Turing completeness|Turing complete]].
 
Both the FX-601P and FX-602P  could load and execute programs from the predecessors.
 
===Programming example===
This program computes the factorial of an integer number from 2 to 69. For 5!, the user enters <code>5</code> <code>P0</code> to produce the result, 120. The program occupies 9 bytes of memory.
 
{| class="wikitable"
|-
! Key-code !! Comment
|-
| {{keypress|P0}} || You'll call the program with the P0 key
|-
| {{keypress|Min}}{{keypress|0}}{{keypress|0}} || stores the value in register 0
|-
| {{keypress|1}} ||  starts with 1
|-
| {{keypress|LBL}}{{keypress|0}} || label for the loop
|-
| {{keypress|*}} || multiply
|-
| {{keypress|MR}}{{keypress|0}}{{keypress|0}} || by n
|-
| {{keypress|DSZ}} {{keypress|GOTO}}{{keypress|0}} || décrements M00 and back to LBL0 until M00=0
|-
| {{keypress|1==}} || end of loop, the machine has calculated <math>1 \times n \times ( n - 1) \times \cdots \times 2 \times 1 =n!</math>
|}
 
==Interface==
The FX-601P and FX-602P used the same [[Casio FA-1|FA-1]] interface as used by the FX-502P line of calculators or alternatively the newer [[Casio FA-2|FA-2]] interface which was also used by [[Casio FX-702P]]. Both interfaces featured a [[Kansas City standard]] [[Compact Cassette]] interface. The FA-2 featured an additional printer port for the [[Casio FP-10|FP-10]] [[Thermal printer]].
 
==References==
{{reflist}}
 
==External links==
* [http://fx-602p.krischik.com/index.php/Main/HomePage FX-602P home page] with in depth information and home of the [http://fx-602p.krischik.com/index.php/Simulator/HomePage FX-602P Simulator].
* [http://www.wulfbecker.de/fx-602p-sim/FX-602P_Sim_for_iPhone.html FX-602P Sim] a simulator for the iPhone and iPod touch.
* [http://pocket.free.fr/html/casio/fx-602p_e.html The Casio FX-602P calculator] on the [http://pocket.free.fr pocket computer museum]
* [http://cdecas.free.fr/computers/pocket/fx602p.php Casio FX-602P] on [http://cdecas.free.fr/computers/pocket/ Caz Pocket Computers Collection]
* [http://www.rskey.org/detail.asp?manufacturer=Casio&model=fx-601P FX-601P] and [http://www.rskey.org/detail.asp?manufacturer=Casio&model=fx-602P FX-602P] on [http://www.rskey.org RS-Key] maintained by Viktor Toth.
* [http://www.voidware.com/calcs/fx602p.htm casio fx-602p] on [http://www.voidware.com/calcs Voidware]
 
{{Casio-calc}}
{{Casio}}
 
{{DEFAULTSORT:Casio Fx-602p Series}}
[[Category:Casio calculators|FX-602P]]
[[Category:Programmable calculators]]
[[Category:Products introduced in 1981]]

Revision as of 23:36, 28 February 2014

Listed here are some great tips about your Top Dressing Garden and the way to produce the proper mixtures, so you will be able to simply sustain your lawn. Have your soil pH examined. I've an enormous problem. Loam based garden - A loamy soil which is neither sandy or clayey, wouldn't undergo the extremes of the earlier two kinds of garden. An acceptable combination would contain 3 parts loam, 1 half peat & three parts sand. When mixing the lawn high dressing purpose to mix sufficient for an utility price of 3 - 4Ib per square yard. Spread the highest dressing over the garden as evenly as potential at a charge of 3-4lb per sq/yd.

This was done with the belief that the lawn would revitalise itself after the highest dressing. This follow should especially never be performed to a Buffalo garden resembling Sir Walter or another buffalo lawn type, as all it can do is help in rapidly growing the thatch layer of the Buffalo garden, which is already a serious concern for this garden type. Welcome to Australia's solely impartial Buffalo Grass lawn care web site! Since many house lawns have poor high quality soil, high dressing turns into even more vital.

Depending in your soil, you could have some weed development for the reason that soil has been disturbed and seeds could also be dropped at the surface. If your soil is of poor high quality, akin to high clay content material, remove the cores from the grass floor before high dressing. If the soil is loamy, go away the cores on the floor to break down naturally. When making use of compost, spread roughly ¼ inch evenly throughout the lawn.

This additionally allows you to mix different cultural practices, comparable to overseeding, with the top dressing for the perfect results. If you do not plan on overseeding your cool season garden, you possibly can apply topdressing in early spring, so it starts working If you loved this post and you would such as to receive even more facts relating to lawn top dressing machine rental kindly browse through the page. because the soil heats up. If your lawn has more than ½ inch of thatch, dethatch or core aerate your lawn first. Consider eradicating the cores from the lawn surface. What we'd like is a prime dressing materials.

They work effectively and might be weighted down with sand baggage or bricks for larger depth. One of the most beneficial things you can do to your lawn is "core aeration". Core aeration relieves soil compaction by removing plugs of soil ¾ inch broad and 2 ½ to three inches lengthy. One concern with aerating in spring is to make sure the soil would not dry out too much in the days following aeration. Prime dressing provides natural matter into your existing soil.

If over-seeding bear in mind to keep the soil moist, however not wet, till the seeds have germinated. It reduces soil compaction and thatch by removing small plugs of small plugs of soil all through your yard. The other time to do this is within the fall after it has began to cool down some. I don't advocate doing this in the middle of summer since grass can get burdened due to the excessive heat and lack of rain.