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Spectrum 48+ 4S - Upper RAM issue, and now a self-created problem!I recently picked up a known-flaky spectrum off eBay, to have a bit of fun fixing it and reliving youth. It was labelled as 'keyboard duff, shows…
... version of Balford's ram test diagnostics said the ... whole of upper RAM was faulty (check all ... removed all the upper RAM ICs, replaced with sockets ... />
Given the lower RAM used to be okay, and ... one of the Harlequin 128k revision 2D boards, with ... -
Upgrading Harlequin 48K to 128K?I noticed this upgrade PCB on ebay for upgrading the Harlequin to 128K: http://www.ebay.co.uk/itm/ZX-Spectrum-Harlequin-48K-to-128K-Upgrade-Addon-PC…
... for upgrading the Harlequin to 128K:
http://www.ebay.co ... /ZX-Spectrum-Harlequin-48K-to-128K-Upgrade-Addon-PCB-UK-SELLER ... it looks like just a RAM upgrade? No AY and I ... like the idea of a 128K inside a 48K case. -
Harlequin 48k and 128ki am redoing my harlequin 48 parts onto a new harlequin 128k bored only parts i can't swap are the rom, ram and will need an ay chip but seeing as th…
... parts onto a new harlequin 128k bored only parts i can ... 't swap are the rom, ram and will need an ay ... -
Nasty vertical pattern on a 128K Toast Rack via RGBI managed to fix the busted membrane on my [url="https://www.worldofspectrum.org/forums/discussion/55755/got-myself-a-128k-toast-rack-plus-a-simple-a…
... /discussion/55755/got-myself-a-128k-toast-rack-plus-a-simple ... CPU is doing and which RAM banks are active (I think ... -
how do i save 128k snapshots to my hdd?i have the +3e disk system and have managed to do it with 48k files.i know 128k files use paging? but how do u implement this into a snapshot save?
i have the +3e disk system and have managed to do it with 48k files.i know 128k files use paging? but how do u implement this into a snapshot save? -
can any 128k features be accessed from 48k mode on a +2, +2a, +3, etc spectrum?like memory paging, ay sound, etc. i have seen that you can jump back into 128k basic from 48k basic on the +2a and +3 machines, using a simple ra…
like memory paging, ay sound, etc.
i have seen that you can jump back into 128k basic from 48k basic on the +2a and +3 machines, using a simple randomize usr command. -
ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…
... emulation
Added 1024 KB RAM emulation for Spectrum & Pentagon ... is perfect
Fixed Spectrum 128k machines border: now ula128, scroll2017 ... on zxuno changing video ram 5/7 when paging was disabled by ... -
ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... emulation
Added 1024 KB RAM emulation for Spectrum & ... is perfect
Fixed Spectrum 128k machines border: now ula128, ... zxuno changing video ram 5/7 when paging was disabled by ... br /> -fixed error when paging rom in ram, on case pages 0 ... -
IM2 on a 128k SpectrumHello: I have found another article on IM2 found in Personal Computer News, Issue 90. In the article "Face up to the Time", I typed up the code (…
... adjustments to run on a 128k machine for adjust the ... When I run it in 128k mode, even with an endless ... odd results. On a Sinclair 128k/+2 and Pentagon, I ... tell, I am below the paging system by staying below # ... learn about IM2 on the 128k.
If y ... -
New Utility ZXSTLC[b]New Utility ZX Spectrum Tape (& Disk) Loader Creator[/b] I made this utility to easily create tape and +3 disk loaders for my projects and have…
... recently to work with a 128k project which requires all ... clashed with some of the 128k buffers, especially for disk ... for either a 48k or 128k program
| containing only ... br /> | change, see later). For 128k programs with additional memory pages ... -
problem when game finished loading 128kI have this problem when some 128k games finishes loading. It just hangs, some time the screen gets corrupted, sometimes nothing happens. It looks …
... have this problem when some 128k games finishes loading.
It ... /> This only happens with certain 128k games, not the 48k ones ... /> I've recenlty replaced some RAM IC's, could this conflict ... with the old RAM IC's?
I've ... -
Killed Until Dead - Spectrum 128K versionI first got hold of this game about the same time as the film "Clue" started being shown on TV, and there was a "Miss Marple" series on TV, followed …
... pieces to make a 128K version (AFAIK the original ... is turbo-loaded in RAM immediately above this
RAM.
6. The ... br />
The 128K version does away with everything ... out to another RAM bank on the 128K Spectrum. However, ... -
Some \"newbie\" questions about the Spectrum +2I bought a +2 last week. I had never owned any of the 128k Spectrums before, nor seen them in action. I have a couple of questions; 1) Do all 128k …
... . Paging is what allows access to the extra RAM on a 128k spectrum ... so any game that uses paging would ... games that go weird with paging enabled (which is why the ... ability to disable paging was included in the first ... -
My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... the contended RAM.
Normal memory paging is extended by ... normal paging routes - basically whichever RAM is in the RAM 1 ... deviced emualted in RAM if needed.
Paging
< ...
7FFD - 128k paging
D0...D2 - RAM select
D3 ... -
an idea that could be very very good...but also very very bad...Hello all! I've been having a chat with some of my friends round here that once loved the spectrum (well...2...as they're all heathens round here...)…
... than the older 16k to 128k Xs, like the Pentagon. If ... more RAM would be good. Getting rid of rampaging :p in 128k ... designed the 128k that way, but be able to emulate paging for ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... be able to address this Ram as you would the 48K ... instructions.
Paging didn't hurt the 128k. The option of ... choices - bigger address bus or paging. If you can think of ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... /> (addressing more than 64Kb of RAM)
i think it ... be able to address this Ram as you would the 48K ... />
but as far as paging RAM, and ive stated on more ... didn't specify 16k/48k/128k/+2/+2a/+3? ... because i ... -
How to detect 48k modeHow can you detect if a 128k machine is in 48k mode (from an emulation point of view, not via BASIC or machine code)? Checking the current rom? But …
... /> 2) When I try Outrun (128k TZX) it crashes after the ... a 128K and behave accordingly, trying to use the extra RAM pages ... . Of course it will crash at some point if paging ... -3-8912A soundchip used in 128K Spectrums, or its equivalent YM ... -
z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
You are completely right. Before z88dk, I would have never considered stepping into assembly coding. Now I try to convert the most critial parts to assembly within the C skeleton, which is a good thing. We should try and get more people to try z88dk, I ... -
'usr 0 mode'Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?
However, the 128k mode uses the old printer buffer as a "paging swap ... routine", and thus any program that runs in 128k mode ... won't have this little bit of extra RAM ... available.
Moving to USR 0 will leave the paging ... -
128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... select. ROM 0 is the 128k editor and menu system; ... /> Bit 5 If set, memory paging will be disabled and further ... | | |
| | |
| | |
0000h +--------+--------+
RAM banks 1,3,4,6 ... -
How can I tell if 128k in codeIs there an easy way in code to check if the Spectrum has 128k, rather than 48k so I can display a message "Must have 128k" etc
... which machine it is (48k, 128k, +2, +3). I think ... aowen suggests, use the paging. Page in a RAM page, write a ... to 49152, page in another RAM page, write a different ... will tell you if the paging worked or not. One ... to not write to a RAM page which may (on ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... /> This should provide a Spectrum 128k compatible memory map, while
RAM. The system is also ZXCF ... idea of mashing Timex and 128k paging together to create a system ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... /> This should provide a Spectrum 128k compatible memory map, while
RAM. The system is also ZXCF ... accommodate both 128 and Timex paging -- if it's a 128 ... 1 or whatever) to either RAM or EPROM, with this bit ... -
Spectrum Game CompatibilityHi, At the moment I have a spectrum 48k. I am planning to get a 128k +2, but I have a problem. Will my 48k games work on 128k +2? Because some of the…
... was basically a vanilla 128k with tape attached and a ... gain the full 64k of RAM (by paging out the ROM) in ... one go, whilst still providing the 128k ... almost identical to the Sinclair 128k.
D ... -
DivIDE and RWAP's DiwIDE*Opps, sorry, wrong forum, this thread must be in hardware topic.* I was planning to get a divide from Rwap, but I'm too afraid of long way the devi…
... />
I think the possible RAM/ROM extension should be a ... ROM pages (the amount of RAM is not a real bottleneck ... limitations.
As for 128k compatibility - I can't really ... theory though, even with divIDE paging in 128k ROM enabled, maybe it ... -
Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…
... we can get the extra RAM/ROM needed).
My ... to write programs that are 128K in size (which is what ... the Spectrum relies on mempry paging, whereas the QL has contiguous ... larger ROMs and greater onboard RAM, the firmware authors could work ... -
Galaksija emulator for ZX Spectrum +3/+2A(black)This is a NEW program/utility/game pack for ZX Spectrum. It is basically an emulator of an ex-Yugoslav computer "Galaksija" which is also Z80 based. …
... .
btw. the SE paging is used BEFORE the +3 ... the SE I use the RAM test instead of IN $FF ... as normal 128k... possibly ;-) So I just page in RAM and write ... -
Amstrad +2 Diagnostic BoardCan anybody help I wish to buy the Diagnostic Board that connects to the I/O strip at the back of the Amstrad ZX Spectrum +2. Many thanks Martin
... Spectrums). Consisting of:
* 128K flash ROM (Am29F010, since I ... it so it can take 128K - 512K 32 pin DIP flash ... without needing to use screen RAM or the ULA
* ability ... up/reset, in either case paging in the flash vs Spectrum ...
