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48k idle soundis there an emulator that emulates the genuine 48k idle hiss/noise (or whatever it's called)? I mean the sound heard when there is no sound, but buz…
PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... the edge connector. The ZX81 16K memory pak for example uses the ... the base ZX81 working (and 16K static RAM expansions can be ...PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... the edge connector. The ZX81 16K memory pak for example uses the ... ]
On my zx81 16k memory pak the +9V edge connector ...Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... ]Surely anything that accesses the lower 16K will be clobbered by contention ...A question from a 'newbie'I have just acquired a ZX Spectrum 48k, but without a power supply. I tried it with a 9v power supply from a Sega Game Gear, and got a picture on my …
"Flashing coloured blocks" can be caused by many things, but the prime candidate is bad RAM somewhere in the lower 16K. Whatever you do, don't throw the machine out though, it can be fixed.A question from a 'newbie'I have just acquired a ZX Spectrum 48k, but without a power supply. I tried it with a 9v power supply from a Sega Game Gear, and got a picture on my …
... bad RAM somewhere in the lower 16K. Whatever you do, don't ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... a large area in the lower 16K that can't be tested ... ]
is intended for 16K machines, and despite the name ... a 48K machine, testing the lower 16K only I think.
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... on the tape tests the lower 16K of RAM. (Select (S)OAK ... who upgraded their speccy from 16K to 48K system, but should ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... one that can test the lower 16K, as that existing one doesn ... not seem to be a 16K/48K test program currently in ...causes of spectrum buzzing when starting?Hello Do you know if might be a problem that a buzzing sounds sometimes when a spectrum is starting on? thanks
Request: searching +3 titles in not-disk formatSee subject: i like to know all Spectrum +3 titles in the archive not released as disks, but as tapes (TAP, TZX or snapshots). I just can search in l…
... up with RAM in the lower 16K - a pokeable OS.
Even ... . It runs happily on a 16K but run it on a ...Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... a fixed point in the lower 16K, would mean that by the ...Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... have to socket the low 16k of mem.
lower 16k and see how it goes ...Spectrum 48k Fault - anybody seen this before?Hello, I have two 48k spectrums that exhibit the same fault. Black border, paper area is full of columns of wavey lines. I have posted a screen sho…
... try another ROM than to replace all the memory chips.More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... code is running in the lower 16k.
Unless we built this ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... code is running in the lower 16k.
Unless we built this ...16 K Sinclair Spectrums Still Available?Hi. I wanted to know if the 16 K Sinclair Spectrums are still available to buy. I have looked around on the net without any success. Maybe someone kn…
... issue 3b motherboard to have 16K?
Micky[/QUOTE ... the bottom left are the lower 16K. The ones to the right ...16 K Sinclair Spectrums Still Available?Hi. I wanted to know if the 16 K Sinclair Spectrums are still available to buy. I have looked around on the net without any success. Maybe someone kn…
[QUOTE=Matt_B;415345]The ones at the bottom left are the lower 16K. The ones to the right near the beeper are the upper 32K. [/QUOTE]It it right to remove all of the 16K rams to have 16K?
MickySomeone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
... also a -5V used by lower RAM).
[*]Check clock signals ... Speccy to check function.
[*]Replace lower RAM (because that's [I ... when that happens).
[*]Replace ROM.
[*]Replace Z80.
[/LIST]
Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
[QUOTE=RetroTechie;430214]
[*]Replace lower RAM (because that's [I] ... starts up with that in.. = lower ram issue :)Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... . It loads a number of 16K headerless blocks at 0xC000, paging ... to contended RAM. And on 16K/48K models it is known ... from tape to the lower 16K RAM (contended). On 16K models, that's ...48K -128K upgradeHas anybody ever made, or is it possible to make an upgrade module for a 48K spectrum that will let you operate it like a 128K Spectrum, and back aga…
... (or could you leave the lower 16k? that doesn't page 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…
... chips to implement the upper memory bank (the last 32KBytes of ... this, because a 16K machine has sockets on upper memory chips, two ... isolate a fault in low 16K memory?
You use your ... stop the CPU and see memory contents.
The pattern ...Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…
... ways, and Port 254 or lower 16k Ram access by the CPU ...ZX Spectrum+ Problem - Need help -Greetings guys, I bought one ZX Spectrum+. This is what displays on the TV: [IMG]http://d.imagehost.org/0371/17102010_001.jpg[/IMG] When I switch …
... /> The only indication that the lower 16K 4116 DRAM is working is ... by the ROM before any 16K memore is accessed, which might ...New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... fail as the first three 16K memory banks are contended.
memory
pop hl
... --------------------------------------------------------------------------
; 12 BYTE memory remap table.
48k Out of memoryIv just had a 48k Speccy arrive today. The keyboard wasnt working right so I changed that. Now when I tried to load Cyclone it started to load ok fo…
... more straight forward than the lower 16K.
You can buy off ...Dumb question but deep answer wantedWhy is the ram on the 48k made up of 8 chips. Both upper 32k and lower 16k (4116) are set up like this. Taking the 4116 as an example this us a singl…
... chips. Both upper 32k and lower 16k (4116) are set up like ... example this us a single 16k dram chip, so why the ... kilobytes.
it's 16k * 1 bit, so there are ... a bit of each byte 16k in totalZ88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …
... was very conscious about the memory usage and pretty much ... possible to choose a less memory hungry engine in exchange ... is carefully planned from a memory conservation standpoint from the ... to move some data into lower conteded memory in the Sid Spanners ...
