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Testing a RAM packI had my Spectrum + today which is working, but i also had a ZX Spectrum 32k RAM Pack and i wanted to test it. Is there anyway i can test this on the…
I had my Spectrum + today which is working, but i also had a ZX Spectrum 32k RAM Pack and i wanted to test it. Is there anyway i can test this on the Spectrum + and if so how ?
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WANTED Machinecode Routine for Paging in Betadisk TR-DOS v5 ROMI try to build a small MCode-program which writes the TR-DOS-ROM v4 / v5 to RAM adress 40000 an up. It´s working on TR-DOS v4 / Betadisk 48k: C…
12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
... a problem with the ram. I ran the diagnostics ... and socketed all lower ram. turned the speccy back ... scope. Inserted a lower ram module and the speccy ... Then removed the lower ram module and reinserted all ... original lower ram ic's. Speccy is ...DIVMMC interface versus DIVIDE interfaceDIVMMC/PICODIVSD/DIVSDNANO is one same device with identical CPLD chip and same memory/features. DIVMMC use 8kB of eeprom with code for boot system f…
... system from SD card. Ram is 512kB, but current ... use only 40kB. Memory paging is copy of old ... support only easy memory mapping/paging and mapram mode. Allram mode ... for other small systems. Ram is 32kB only and ... system ESXDOS use full 32kB ram + next 8kB swap ...Spectrum 48k won't start any software but passes all RAM testsI have a rubber key 48k which will not start any software - it appears to work perfectly right up until the end of the tape and the program would sta…
... a problem with the upper RAM however on running the soak ... minutes. I also performed the RAM test detailed here http://www ... longer or look for non-RAM related issues?Creating a POK from RAM or binary.Don't know if this is the right category or not but here goes. I'm working on a bug fix for a game, it's a few hundred bytes worth of custom code …
... said file from a set RAM location or a binary? I ...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…
... tape version of Balford's ram test diagnostics said the whole ... of upper RAM was faulty (check all ICs ... 've removed all the upper RAM ICs, replaced with sockets and ... .
Given the lower RAM used to be okay, and ...zx.zigg.net lower RAM replacement module: Still shipping?Hi everyone I'm trying to resuscitate my 48k issue 6a, and I bought the lower RAM replacement module from zx.zigg.net. The paypal payment went thr…
... , and I bought the lower RAM replacement module from zx.zigg ...RAM questionI've been meaning to upgrade my desktop pc's ram for ages now as the 4GB it has isn't cutting it anymore but im confused about what ram my motherboar…
... my desktop pc's ram for ages now as ... but im confused about what ram my motherboard will support.< ...
The motherboard has 4 ram slots 1 taken by the ... i dont know what ram is compatible and what ...
in its ram section for the motherboard but ...ZX81 Ram pack problemI got recently Sinclair 16k memory expansion for my ZX81, but for some reason it will not work. The computer itself is operating normally without hi…
... years.
Of course, maybe ram pack is faulty, but it ...48k Speccy with Ram Turbo, Dust Cover and a couple of games!I'm selling one of my Spectrums on Ebay, and along with it a dust cover, a Ram Turbo Interface for cartridges and joysticks and a couple of Codemaste…
... it a dust cover, a Ram Turbo Interface for cartridges and ...ZX Spectrum+ showing 16K of RAMHello again, as the title says my ZX Spectrum+ is showing only 16K of RAM instead of 48K when running a memory check. [url="http://www.1000bit.it/su…
... + is showing only 16K of RAM instead of 48K when running ... how to identify the faulty RAM chip, but I seriously have ...Troubleshooting RAM IC's on Spectrum +2 Grey?Got myself a grey +2 but at startup it shows something very similar to this: [img]https://preview.ibb.co/mmai5F/2_Ram_Fault.png[/img] I also su…
... also suspect there is a RAM fault but how can I ...Lower & upper ram IC's for an issue 3 please.Would any of you great folks have 1 spare lower ram, and 1 spare upper ram IC's you would be willing to sell. I'm fixing up a poorly Spectrum that is…
... 1 spare lower ram, and 1 spare upper ram IC's you ...Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... seemed to indicate a lower RAM issue. It hadn't been ...Third-party ZX81 RAM packsOne of the things that's previously held me back from fishing for a ZX81 on eBay - other than "will the ULA on this machine sold as 'untested' be com…
... getting hold of a 16K RAM pack. Now, even back in ... of the existence of other RAM packs that weren't the ... (at least try to) eliminate RAM pack wobble, but then there ... time it had a working RAM pack I was [i]five ...MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable!Direclty from my personal Sinclair collection that never end... ...MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable…
Direclty from my personal Sinclair collection that never end...
...MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable!
https://www.ebay.co.uk/itm/173022113295
Have a nice bid ;)Testing ram memory of DivIDE / DivMMCHere is new utility for testing DivXXX ram memory: [url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/sof…
Here is new utility for testing DivXXX ram memory:
[url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/software/divramka.zip[/url]How would I turn memory paging on/off in Assembler?Sorry for the noob question. It's perfectly ok to do OUT 32765,48 in BASIC to turn memory paging off. But how do you do it in assembly language? I kn…
... in BASIC to turn memory paging off. But how do you ...sam coupe with external 1mb ramvelesofts site has snaper disks: https://velesoft.speccy.cz/sam_zx128.htm when you use masterdos to detect the external 1mb of ram interface th…
... detect the external 1mb of ram interface then the snaper emulator ... lets you select the fast ram and the zx spectrum game ... uses this ram above 32768 this gives you ...Sinclair 16k Ram pAck Issue3 schematicsHi guys, I am willing to repair a 16k ram pack for the ZX81 but I cannot find any schematic of the ISSUE 3 ram pack. I could only find a schematic…
... willing to repair a 16k ram pack for the ZX81 but ... schematic of the ISSUE 3 ram pack. I could only find ... and replace them with 8118 ram which requires only +5V. Problem ... desoldering one of the 4116 ram, I lifted the tiny little ...48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …
... are only in the upper RAM as it will actually boot ...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 ... 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 & Pentagon ... on zxuno changing video ram 5/7 when paging was disabled by ...
-fixed error when paging rom in ram, on case pages 0 ...The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…
Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors can do this . But I suspect there are loads of other ways to damage lower RAM ICs? Any ideas?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…
[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 adapted it recently to work with a 128k project which requires all the memory pages to be ...upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…
... would just fry the lower ram again .. this is one board ... like somebody attacked the upper ram with a black and decker ... sugestions for replacing the upper ram tracks ?zx spectrum display corruption .. with lower ram module installed[img]https://photos.app.goo.gl/Gu6rjC5v21sZxwTX9[/img] [img]https://photos.app.goo.gl/FznVw8SkbbhWn5mh7[/img] another specie question : i have …
... video corruption, it has lower ram module fitted.. can get it ... it shows lower ram as good and upper ram not detected although ... start digging at the upper ram, or the 4 logic chips ... that drive the upper ram.. i am presuming that one ...
