Zx spectrum test program

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zx spectrum test program

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Test Program

Copyright c Luboslav Lacko. Developed by Lacko Luboslav. Approximate size 4. Age rating For all ages. This app can Access your Internet connection.So let's focus on that. You can download it for free. It has compiled versions for Windows, Mac and Linux.

But it's not at all necessary. Below you see that the ZX Spectrum has 2 audio jack connectors. I have solved it by connecting stereo extension cables for the output of my audio cards to mono audio jacks. This will emulate the PLAY button on the tape deck. The other reasons that I am using an external sound-card for recording is because it has less interference and is it's better for recording. The red and white connectors are for the recording. The other two silver connections are the main sound output of my computer and are wired to external audio speakers.

Now that we have explained the physical connections, let's look at the Audacity configuration. After you start up the application it will look like on the screenshot below. The marked area is where the input and outputs are configured. Because I am using this dual sound-card setup I needed to configure the correct cards for recording and playback. As you can see, I have configured recording for stereo. At a later stage I have noticed that you can also select mono, but I have not tested if the recording would work properly.

I encourage you to try it. This would allow you to skip the steps that convert the tracks from stereo to mono, which are covered in the next steps. Now is the time to save our program from the ZX Spectrum.

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Type save "FN test" and press enter. You will be prompted to start tape and press any key. You can now press the record button in Audacity and press any key on the ZX Spectrum. After the saving is finished you will end up a multi-track recording for the left and right channel. Apparently we will need to get rid of the channel that did not receive any input. To do that click on the arrow next to the audio track and select "Split Stereo Track".

This will allow you to delete the empty track.

The Software Library: ZX Spectrum

Now press the cross next to the "Audio Track" button inside the left track that is marked yellow. It will delete the track. We will end up with a screen looking like the screenshot below.

Because the signal was weak we will need to amplify our recording. To do that go the the "Effect" menu and click on "Amplify You will be prompted with a question on how much you want to amplify it. Just select the default, as it is set to the maximum amplification. After the amplification process is finished we need to change the output of the track to mono, otherwise the ZX Spectrum will not receive any data.

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Click on the "Audio Track" menu and select "Mono". Between the time of pressing record inside Audacity and a key on the ZX Spectrum keyboard we recorded some silence.In closed loop system such as a computer, because of the interdependence of numerous component parts, fault diagnosis is not necessarily straight-forward.

In addition, because of the high speed cyclic operation, interpretation of any waveforms on control, data and address lines as being valid depends to a large extent on practical experience of the system.

There are however, certain checks with valid waveforms and levels that can be carried out before substituting any integrated circuits. Experience has shown that the best method of initially checking waveforms and levels can be to compare with the same point in a known serviceable board.

The following pages provide a basic fault-finding procedure and furnish a list of possible faults along with suggested ways of curing them. Burnt-out discrete components or an overheated track show up immediately, as do the attentions of an enthusiastic amateur.

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Providing first principles are adhered to and a common-sense approach is adopted, it will be found after a short space of time that fixing a faulty Spectrum is very much a routine operation. The unstabilised external power supply unit is a source of some problems. The design is such that, at minimum input voltage ac and 1. This indicates that most of the system is working. If the Spectrum does not initialise, carry out the following basic checks.

Basic Checks. It is difficult to be specific in a fault-finding guide because of the large variety of fault conditions which can occur, but the following procedure, starting with a table of checks set out in order of priority, will however isolate the major fault area. If all is still satisfactory at this point and IC1 is the plug-in-type, replace IC1. It is possible that one of the Z80A or RAM control lines has become faulty therefore, comparing with a known serviceable board if possible, check the waveforms at the following points at origin and destination:.

If no fault has been found and the computer still has not initialised, the fault could lie in the RAM. If the computer is a 48k machine the 32k of expansion RAM can be isolated.

This is probably best done by very carefully cutting the track to IC25 pin If this operation clears the fault condition, the expansion RAM will have to be further isolated.

In either instance the point has been reached where it is necessary to start replacing ICs.

ZX Spectrum Software:

After each change of IC the unit must be powered up to check for correct initialisation. This may be done by using an IC test clip, to which is attached a serviceable IC of the relevant type eg orto bridge across each suspect IC in turn. This method is not guaranteed to work but can often save a lot of time unnecessarily changing suspect ICs.

Where a Spectrum has initialised correctly but a RAM memory fault is suspected, it is possible to find the faulty address and relate it to a faulty IC by carrying out the following procedure:. The value printed in each instance is the last valid memory location, and in a serviceable unit would be as set out above.

If the value returned is less than the fault lies in the original 16k of RAM. The following example illustrates the method of relating a faulty location to a fauly IC. If a 48k Spectrum is giving a memory of Assume the answer displayed istherefore the faulty location is stops at last valid location. If answer B is anything other than look up in following table which IC to change eg if answer B is change IC Similarly, if answer A is other than 85 refer to the table to find the faulty IC.

If there is more than one faulty RAM location the first fault identified will have to be repaired before it is possible to proceed.

zx spectrum test program

The keyboard is connected horizontally in eight blocks of five keys and vertically in five blocks of eight keys. The diagram below shows the configuration. It follows that is any block of five keys fail the fault is with KB2 circuitry or the 8-way membrane, and that if any block of eight keys fail the fault is with KB1 circuitry or the 5-way membrane.

Continue to Section 4.If you're just getting started with your Spectrum and want to test loading software from a PC or audio player, you might like to try some of the old and new games listed below. MP3 and zipped WAV audio files are provided along with a link to more information on the game at the World of Spectrum web site.

zx spectrum test program

It will probably be necessary to experiment with the setting of the volume control in order to achieve reliable loading. It uses a machine language routine to fill an area of memory either all of upper RAM or a portion of lower RAM with a sequence of randomly generated values and then reads them back, compares them with the sequence that was written and reports any differences. If there were no differences, it repeats the process until a memory error is detected or until interrupted. An error report consists of a list of up to sixteen memory locations and the expected and read values for each.

However, it was trivial to include the ability and so the option is offered. ZX Spectrum Software: If you're just getting started with your Spectrum and want to test loading software from a PC or audio player, you might like to try some of the old and new games listed below.See what's new with book lending at the Internet Archive.

Search icon An illustration of a magnifying glass. User icon An illustration of a person's head and chest. Sign up Log in. Web icon An illustration of a computer application window Wayback Machine Texts icon An illustration of an open book.

Books Video icon An illustration of two cells of a film strip. Video Audio icon An illustration of an audio speaker. Audio Software icon An illustration of a 3. Software Images icon An illustration of two photographs. Images Donate icon An illustration of a heart shape Donate Ellipses icon An illustration of text ellipses.

Media Type Media Type. Games and entertainment software for the ZX Spectrum. The Internet Archive Software Library is a large collection of viewable and executable software titles, ranging from commercially released products to public domain and hobbyist programs.

48K ZX Spectrum Repair. (No. 6)

More titles are added frequently, and users are encouraged to donate newly found floppy disk images and programs. Applications for the ZX Spectrum. Graphics, sound and programming demonstration programs for the ZX Spectrum.

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Most are of "Demoscene" artworks, with a small amount of commercial packages providing reduced-function examples of the full products. Big from delivering heroin for free. You control a boat that can destroy enemy boats and can go up to MPH. You must dodge or destroy enemy boats and must dodge defensive gun fire. From Mobygames. This game will take you to Paris and San Francisco. In Paris you will need to chase Mayday in your vehicle as she parachutes down Your aim is to avenge the death of Felix Leiter, who was killed by the Your aim is to avenge the death of Felix Leiter, who was killed by One of them in controlled directly in first-person perspective and the others in a tactics mode.

The campaign is Your aim is to avenge the death of Felix Leiter, who was killed Your first task is to retrieve each of the He discovers a network of underground caverns used by an Educational and learning programs for the ZX Spectrum.

Atic Atac is an Beginning with a "training" mission in Gibraltar, Bond then Beginning with a "training" mission in Gibraltar, Bond Gold Developed by Access Software, Inc.Randall Rothenberg is the president and CEO of the Interactive Advertising Bureau, the trade association for interactive marketing in the United States.

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