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RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... simple: if you run the BASIC programs I provided in my ... screen area still contains the upper "third" bitmaps, the next 2K ... following 2K still contains the lower "third" bitmaps. The attributes also ... -
BrewDog beerI've recently been working my way through the wonderful range of Brewdog beers. Yum yum, shame there's no BrewDog pub near me :( I wonder if anyone…
... give the different flavours. The basic ingredients are more or less ... low temperature, short in this case would be nearer to a ... hops to the basic brew. Remember the Tyskie is lower strength so ... -
RANDOMIZE USRI always thought that this particular basic command was not intuitive! If I understand correctly is means run the code from the memory address, is t…
... always thought that this particular basic command was not intuitive!
BASIC routines on other platforms have ... machinecode and never return to BASIC.
On the ... upper screen with RST 16
RANDOMIZE USR will print to lower ... -
Changing the colour of the loading 'stripes'I was wondering if it were possible to alter the default colours of the standard ROM loading 'stripes' via BASIC, mabye a POKE command of some descri…
... start from scratch with your BASIC loader using the "turboBASIC.szx ... 0 code into the current BASIC program. "boombotmaster.szx" is an ... ; the main code sits in upper memory from 65169 to 65535 ... bad checksum, or in WAV2TZXs case a seemingly good checksumed file ... -
Flashing coloured blocks - diagnosisHiya, hope this is the right place for this... Was given an Issue 2 48K by a someone yesterday that hasn't been powered on in 20 years, which works …
... a fault in the upper RAM, not the lower. This is certainly ... used in some of the BASIC system area and this later ... . Try it against the upper and lower RAM and leave it running ... -
Flashing coloured blocks - diagnosisHiya, hope this is the right place for this... Was given an Issue 2 48K by a someone yesterday that hasn't been powered on in 20 years, which works …
... for the lower RAM and another two for the upper. The other ... generating control signals for the upper RAM.
Also, once ... splash. Something as basic as that could kill the lower RAM. I ... -
SAM Coupe - a video problemHi mates. Lately I managed to acquire a SAM Coupe 512K. There are, however, certain problems that - I thought - You might help me with, in a mome…
... , it will be using the upper 256K for the screen on ... one or both of the lower DRAM is faulty. If it ... TV I think in this case, the RGB signal is generated ... -
BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... was being processed. As the upper screen is unavailable I had ... to redirect editing to the lower screen, which I could only ... of the text, whichever is lower. It loaded successfully about 14kb ... Wednesday, which will include the BASIC loader with the restart option ... -
Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…
... a typical fault in the lower RAM isn't the cause ... quite common for a faulty upper RAM IC to interfere on ... remove IC15 - IC22, in which case the Spectrum should then initialise ... -
ZX Printer - prevention better than cure?Hi everybody, I have in front of me a working ZX printer, and a printer belt. Of course I suspect that the minute I put the belt into the printer a…
... top of the belt). The lower on the belt, the better ... : 2.5mm caught on the upper case). Originally, I tried putting some ... -
48K loudspeaker questionsI wonder if someone would know what "40 ohm T.V. type" means? This is the description of the 48K loudspeaker given in the service manual. I?d also li…
Going back to basic electronics, a speaker is normally ... :
Impedance : in this case 40ohms
Maximum rated power ... of the source, in this case the output circuit of the ... a power drop, where a lower impedance can result in a ... -
Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …
... ][/QUOTE]
Just a basic multimeter, with volts, resistance, diode ... Membrane and z80 with confidence, lower RAM with less. I suspect ... anywhere. However, none of the lower RAM chips are heating up ... eBay inside a rubber keyboard case. I want to have the ... -
Storing strings in minimum spaceIn the game I am planning there will be a number of text strings. I am looking into different ways of encoding the strings so that they use the minim…
... if you're using both lower & upper case letters). If it was ... -
ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
[QUOTE=camaisin;712351]In case of putting a upper ram module, do you send to Portugal?[/QUOTE]
Yes. Prices will probably be the same or very similar to those for the lower RAM module. -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
... ' CF card system, the much lower current draw of the IF1bis ... interface (although this is the basic one with no additional ROM ... know why this was the case: I did momentarily get the ... -
Games/Programs making use of DivIDE featuresHello :) I have a question: I may be wrong, but it looks like the DivIDE and similar interfaces for the ZX Spectrum are almost exclusively used for …
[QUOTE=Alcoholics Anonymous;712817]Contiki is not trying to be a complete o/s -- it is only trying to supply a lightweight kernel that delivers a certain minimum level of services typically needed by small embedded systems. Accordingly it stays away from ... -
Old homemade hardware?Hey there, I've been given a bunch of ZX Spectrum stuff, I've mostly fixed the computer, just need a membrane. But what I was wondering is that there…
... fault (either the 16k "lower" RAM) or...
[*]"Upper" (as in the ... you type in a short BASIC program to test the RAM ... -
The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…
... the pattern (I suspected a lower RAM multiplexing issue), once ... replaced the lower 16K tests passed.
However the upper tests ... have the problem that the case looks like crap:
< ... a liberal treatment of the case plastics with tyre dressing gel ... -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... Is a superset of ZX81 BASIC. It contains equivalents for ... directly supported. From T/S2000 BASIC it supports ON ERROR, ... RESET, and SOUND. From TK90X BASIC it supports TRACE and UDG ... With CAPS LOCK enabled, only upper-case keywords are tokenized, enabling the ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... references to different files and BASIC-pseudo-MC loading (which I ... a certain number of bytes lower in memory to make room ... and tested, particularly useful in case of, for example, compressed loading ... -
I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... right-hand side of the upper case and an audio jack in ... pair of ribbon cables (upper and lower side) link all the boards ... -
Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... , I removed the chips from upper 32k and I also removed ... its now time to change lower ram.
To be honest ... that this was already the case before I touched it.
lower rams but I guess there ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> res 5, (iy + _flags) ; signal lower screen
set 4, (iy ... character
and %11011111 ; make upper case
ld c, a ; store ... -
SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
... Initialisation: Generates bitmaps for the lower 8 block graphics ($80-$ ... as block space, in case it's inverse
case not to BASIC
ld ... cp $40 ;called from BASIC?
ret nc ;no ... -
Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …
... Spanish: a running calculator in BASIC. UK: standalone calculator (not ... usable with BASIC).
Spanish: full screen ... br /> Spanish: TOKENs in upper case only. UK: TOKENs in ... any case.
Spanish: SPECTRUM command. UK: 48 BASIC menu ... -
Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …
... Spanish: a running calculator in BASIC. UK: standalone calculator (not ... usable with BASIC).
Spanish: full screen ... br /> Spanish: TOKENs in upper case only. UK: TOKENs in ... any case.
Spanish: SPECTRUM command. UK: 48 BASIC menu ... -
Help a small machine code game.Hello all you clever wossers are there any GOOD?? games that are in machine code (no basic apart from the loader,rnd usr bit) but are very small ma…
... are in machine code (no basic apart from the loader,rnd ... due to the coding in upper memory.
ZX ...
Wiwo Dido and the case of the broken timemachine
Wiwo Dido, the case of Mazeddy's Castle
"Freezes" on program loadingHi! I have ZX Spectrum+ (Issue 6A), and recently it has started to freeze w/o returning an error (but keyboard works) on program loading, regardless …
If the machine initialises to BASIC without crashing and can accept ... the machine stack in the lower 16K (unless you then try ... /> If this works, then an upper RAM fault becomes pretty much ..."Freezes" on program loadingHi! I have ZX Spectrum+ (Issue 6A), and recently it has started to freeze w/o returning an error (but keyboard works) on program loading, regardless …
... /> Try the CLEAR suggestion to lower the RAM top before resorting ... in case some system variable becomes damaged due to an upper RAM ...
