No, sorry... I meant that the stock membrane can be totally broken. The Hungarian Enterprise membrane has superb quality, it will work fine.

The RGB cable image will give other hints to our wise men to know which component is defective.

If the speaker does not sound at keys pressed... The EP probably can't boot.

This picture is from Zozo's useful Enterprise page:



At the right you can see the representation of the Monitor/Audio EDGE connector, very near to the RF output connector you have been using.

The view is from the rear of the Enterprise(all the computer connectors have B=components side up, A=solder side down, numeration starting from the left of the viewer.

You must test with a multimeter the voltage between pins B2(GND) and B6(+12v).

There is one variation of the Spanish Rom, the ESB.Rom, made for the German keyboard, that you can also find on the emulator installation. On it, the English/USA layout on the Rom  has been replaced by an "European" QWERTY  layout with all the same "English" characters but in its corrected "German" position. And the Spanish keyboard in the Rom is also a QWERTY one with the "European" layout, so you always find the punctuation symbols.


The language Rom adds a lot of flexibility adapting the Enterprise to a language/country, with the dual messages and keyboards. But is also a great example of the expandability of the Enterprise, how a new driver can substitute the stock driver and the machine works the same.

Don't blame Google for its translation, it learns very fast...

I understand only a few Magyar words... but to ensure that the translation is close to what I want to express, I make a double translation, first English to Hungarian, and then from Hungarian to English. Some information is lost often, so it is a mater of changing something in the text until it says something intelligible....

i do not have, but if i remember well it was mentioned on the forum, speccy psu is good, just the polarity should be changed.

¡NO, please! Spectrum PSUs have the same polarity, Ground at the centre and +9V at the outside ring.

The UK Enterprise came with a 2Amp PSU, and the German one with an 1,3A, as can be seen on this picture:



The gummy Spectrum had a 1A PSU, probably insufficient, but the Spectrum+ and following reincarnations had a better suited PSU that can serve perfectly for an EP.

Writing English is very different from speaking it...


Edit. You see? I usually must edit my commentaries after releasing them, because I put a lot of errors on them.

I have not thought about it until recently: it is a pain to wait for the memory check on a stock Enterprise with lot of memory.

So this is the question: is there a way to skip the EXOS memory check with a SF3 connected?

Fortunately, yes. The solution comes from Zozo, of course, and his Fast memory check, that we can inject on segment 04(Cartridge memory are the 04-07 segment range) and will test the memory on a fraction of the time. It also brings us some other functions, like advanced tests, type and frequency of the Z80, and the enhanced WP2.6 text editor.

To install it we must left unplugged the Basic cartridge, and add the following lines to the SF3_EP.INI file:

ROM[4]=SD:EP/WP26.ROM
ROM[5]=SD:EP/BASIC21.ROM
Then download and place the following Roms on the SD:EP/ directory of your SF3 SD card.

Remember to not plug the cartridge on its bay while you have Roms injected with the SF3 on the cartridge addressing range, or it will cause a hang.

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Now, a little technical explanation about why Zozo's Fast memory check intercepts the original memory test:

One of the very first things that the EXOS Rom does when the Enterprise boots is to check if there is an special Rom on the 04 segment. Usually the first characters on a Rom header, for example on the Basic Rom, are "EXOS_ROM", but if that special Rom has the string "TEST_ROM",  the boot process is halted and the control is passed to the program in the Test Rom.

This probably was useful on software/hardware development or on quality control after manufacturing the computer.

What Zozo's FastMemoryTest does is to perform its own test and then return the control to the EXOS Rom, but just on the point after the stock memory check is already done.

Olyan csodálatos, hogy ezt a folyamatot meg lehet valósítani, hogy egy kicsit több vagy kevesebb fényerő nem az, ami igazán fontos számomra.

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It is so miraculous that this process can be done, that a little more or less luminosity is not what really matters to me.