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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] -
ZEsarUX-7.0Hi! I have uploaded a new ZEsarUX stable version :) This is ZEsarUX 7.0 There are a lot of new features added, more than ever! You can downl…
... -Evolution BaseConf emulation
Added BetaDisk and TR-DOS emulation
Added a setting to dump ram contents to file when exiting ... -
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 ... -
Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…
... the TR-DOS-Commands in RAM at adress SAVE or adress ... via a CALL to TRDOS/Betadisk-ROM (15619 on TRDOS v5 ... -
Beta-Loader (boot Loader for Betadisk) updated to v3Hi, I´ve updated original Version from unknown author of "Beta-Loader". This is a program written in BASIC as boot menu for BetaDisk / TR-DOS Disk…
... BASIC as boot menu for BetaDisk / TR-DOS Disk Systems. I ... v5 (USR 15616/15619). On Betadisk equipped with Vision ROM GUI ... -
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? -
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 ... -
Paging for 64Kb of Video Ram??? What is the best way to page this?Hi all, I'm just putting together a concept card for a "Loki" style of video card, which supports shadow ( so it fits a normal Speccy ) and also t…
... single 48K video page with RAM relocated to the ROM space ... -
Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…
... see the upper 32k of RAM.
When it boots ... programs and even run a RAM diagnostic. Basically, tells me that ... all the associated logic, and RAM chips, with no effect. I ... direct connections between the upper RAM and associated logic, and I ... -
Max RAM for ZX Spectrum gamesHow much RAM can be used for single level/whole game? On tape writing.
How much RAM can be used for single level/whole game?
On tape writing. -
Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... This model has a "common RAM field", like in 128k ... there's no contended RAM and there's no ... come with 1024MB of RAM and onboard Betadisk (TR-DOS) floppy ... , #C000), there are 32 RAM pages and up to 32 ... . This machine also has BetaDisk onboard. You can order ... -
Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... RAM.
#3D2F address is used for direct access to Betadisk ... own executable code there). Betadisk contains an internal circuit which ... #FF, it allows Betadisk ROM to change RAM pages via #7FFD.< ... #3Dxx and to RAM will activate/deactivate Betadisk I/O space).< ... -
New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... new development, it has 1024KB RAM, onboard betadisk interface, slot architecture and ... -
Early Version Betadisk Manual (ie anybody have one)Folks, after lengthy excavations in my attic I have dug out my old Betadisk interface and 720K drive. However the manual has done missing. It's wa…
... ROM image from disk to RAM and then transfer it to ... a flooded house (so the betadisk is a little down the ... -
I want a DivIDE but....I need help, I want to get a DivIDE but I need some advice. Which one do I go for DivIDE or RWAPS DivIDE+ (when they become available). Which firmwa…
... it requires battery backed RAM, which can be either ... and reliable. Standard static RAM was never really designed to ... the Speccy corrupts the RAM, so it's not ... circuits to protect the RAM on power up/power ... number of superb soft. Betadisk has a stupid format, ... -
Gauging interest: ZX EvolutionHi everyone. First of all I would like to introduce myself, since this is my first post. My name is Conrad, I'm from Vancouver, BC, Canada, and I hav…
... important chips (Z84 20MHz, BetaDisk controller, AY/YM) are ... states);
* 4 Mb RAM, 512Kb ROM;
* ... graphics card, ZorRAM 256MB RAM card, IndivisionAGA scandoubler, FastATA ... 90MHz 68060 accelerator, 512MB RAM, CTPCI PCI busboard, NetUSBee ... -
2013 projects: new PlusD, DivIDE and MultifaceI have written about this before, but as I want to let these project be influenced by your opinions, I thought to create a separate topic about it. …
... would be for a new Betadisk interface.
Like a ... heard! You want a new betadisk??" ;)
[QUOTE]
> ... already created divIDE with 512KB RAM. It would be even better ... me once about adding more ram to the design.
Tell ... -
TR-DOS + 48K + divIDESo since I'm now a proud owner of divIDE and ESXDOS with TR-DOS emulation, I would like to make some use of the latter. Basically I want to try out …
... available in MapRAM mode (BETADISK.SYS will not be loaded ... and run only in DIVIDE ram memory. DIVIDE interface in ... mode use one 8kB ram page for EEPROM emulation ... in MAPRAM mode only 24kB ram usable. If your system ... use full 32kB ram (last 8kB ram page is used ... -
Addresses in Fuse debuggerFrom Fuse man page: [I]Addresses can be specified in one of two forms: either an absolute addresses, specified by an integer in the range 0x0000 t…
... currently paged into memory. RAM and ROM pages are indicated ... , respectively, by `[I]RAM[/I]' and `[I]ROM[/I ... available sources are: `[I]Betadisk[/I]', `[I]DISCiPLE RAM[/I]', `[I]DISCiPLE ... ]DivIDE EPROM[/I]', `[I]DivIDE RAM[/I]', `[I]If1[/I]', ...
