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TV tuning problemI've just discovered that I can't tune in any of my Spectrums on my new TV. (Well, "new" in the sense that it's an old one I was given to replace an …
... to only move the upper part of the case far enough to ... -
damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…
... , which doesn't seem the case? Not sure what to make ... you... (btw. too bad the upper 32K isn't socketed, so ... -
ZX Spectrum + Issue 6A Repair attemptHello everybody! I got ZX Spectrum + which doesnt work properly. On power up I can see color mosaic, then paper goes black and i can see thin red ba…
... assume the upper RAM chips aren't socketed? In that case, easiest ... . Let's hope disabling the upper RAM provides some clues... -
BITWISE operators...Hi Folks, Another question - is there a way (fast) to do bitwise operations in Sinclair BASIC? Many thanks Paddy
... as strings in the DEF FN article on the tech wiki ... -
SZX Beta 128 (aka TRDOS) block questionHello, I have a question or two regarding the Beta 128 (aka TRDOS) block of SZX. Hopefully someone (Jon, Philip) will help me. What is supposed to …
... .
As for the upper two bits of the system ... getting to those in this case...
Fortunately TR-DOS ... why it works even in case of Fuse.
[QUOTE ... system register (at least in case of a real machine). In ... -
48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... probably removed and replaced the upper RAM, possibly fitting sockets, and ... this unjammed A14. In any case the original Z80 was off ... -
How do you work with fonts on speccy?just curious really.. I know c64 workings, and obv. the spec you draw direct to screen.. on 64 , you'd make what would be equivalent to UDG.. and sa…
... he means $40 hex, the upper half of each double height ... so it was just a case of dealing with the top ... -
Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…
... (upper right corner pin) = GND = same electrical point as modulator case. Measure ... right) = +5V
Pin 1 (upper left) = -5V
Pin 8 ... good idea to remove the upper 32K (RAM chips in middle ... -
Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…
... ] statement (although in our particular case it probably won't make ... : PRINT : RETURN
9000 DEF FN t()=(PEEK 23672+256*PEEK ... 5000
9030 LET t1=FN t(): LET a=1: LET ... : GO SUB 4000: LET t2=FN t()
9040 GO SUB ... -
Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…
... of 50K in the worst case, the algorithm would not be ... : PRINT : RETURN
9000 DEF FN t()=(PEEK 23672+256*PEEK ... 5000
9030 LET t1=FN t(): LET a=1: LET ... : GO SUB 4000: LET t2=FN t()
9040 GO SUB ... -
Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…
... BASIC?) that goes over all upper 32K memory locations. For each ... chip a few times in case it's a loose contact ... -
Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…
... ... :smile:
True the upper 32K logic IC's could ... practice that's rarely the case - simple 74xx logic chips with ... as repair method. Luckily the upper 32K normally sits in sockets. -
Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
Actaually the case would be the stumbling block. ... +? Especially when the original plastic case carcases are pretty readily available ... for lower and one for upper memory), instead of a Ferranti ... -
Coding Integral Calculus EquationsDoes anyone have experience of writing routines to evaluate integral (or differential) calculus equations on the Spectrum? I've been trying to find s…
... a formula!
In case you need a brief summary ... integration sign up to the upper limit, in steps of (top_limit ... -
Upgrading 16k MemoryHi All I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flashing blocks)…
... Normally (part of) the upper 32K simply wouldn't be ... case).
[*] Insert logic IC's (IC23-IC26), but no upper ... you have maximum number of upper 32K chips inserted & ... static RAM chip for upper 32K (soldered on top ... need some of the upper 32K logic, so either ... -
Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…
... (not keys, and rubber key case is small enough IMO), not ... is a PITA).
[*] Replace upper 32K RAM with another SRAM ... -
ZX Spectrum Woes...In my endeavours to get my second Spectrum (Issue 3) working I have replaced the CPU, memory and lower ram. I have fitted sockets for the CPU and me…
... towards lower memory in your case, even though it doesnt get ... lower memory, if it was upper memory you would at least ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... , there seems to be the case. This is because of faults ... and do Sami's fix Upper 32K SRAM D43256BCZ-70LL SRAM ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... ... :smile:
Of course upper 32K RAM should be an ... voltage (from battery in this case) to be used directly by ... -
Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... height
;position means left upper corner of the block
case, so first tile would have ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... intriguing and maybe, in the case of not so well-known ... post the logo in the upper left corner of the WoS ... -
Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …
... is lower screen, 2 is upper
call 5633 ;some rom ... routine to open upper or lower channel
ld ... than me but just in case you've not seen it ... -
Can anyone see a way to speed up the following line of code?Hi Folks, Been looking at bottle necks in my code using BASin's Profiler and the following line (well the 2nd LET statement) is somewhat slow. [COD…
... =Crisis;547979]But in this case,with CHR$ 10, you can ... /> I dont mean the DEF FN placing in LINE 0 here ... , put the most used DEF FN ahead.
Further, longer variable ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... 's the whole point: because upper byte doesn't matter (I ... problem: when reading keyboard, the upper half of port address matters ... trigger those devices. In the case of the ULA it only ... -
Modified 8x8 Font...Hi Folks, I am trying to come up with a good looking font for the Spectrum. I have looked at the BBC Micro font, Apple Mac etc. and so far I have: …
... letter 'v'. Both the upper and lower case versions of that look ... -
Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... in BC also just in case anyone wants to use it ... address
ld a,2 ; upper screen
call CHAN_OPEN ; get ... -
AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
Now that the FN bug has been fixed, I ... BASIC is:
FN z(FN z(scr,FN z(msk,0,"~"),"& ... a custom ROM, in this case, the patched ROM I've ... -
New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…
... in BC also just in case anyone wants to use it ... address
ld a,2 ; upper screen
call CHAN_OPEN ; get ...
