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New MEMFACE projectMEMFACE is my old project, but never finished. Now is PCB done (at the post office) and I write firmware for CPLD. MEMFACE is interface with external…
... devices
- all ram features
- rom switching 16kB mode for flashing ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... +2A
- Connectable to Spectrum 16Kb + Superupgrade.
- Supports until two ... (not valid for a spectrum 16Kb due to insufficient power supply ... -
Converting a 16K speccy in +3??Yes, you heard right. A new interface to convert a 16Kb speccy into a Spectrum+3 have been developed. [IMG]https://lh6.googleusercontent.com/N2eAoz5…
... new interface to convert a 16Kb speccy into a Spectrum+3 ... />
- 128/256/512Kb de RAM upgrade. Selectable by jumpers
16Kb speccy in a +3 is ... games which not using shadow RAM will works fine.
Double keystrokes on zx spectrumHappy New Year everyone. I have this spectrum 48k issue 3b I?ve been working on now and then. I have replaced upper rams, installed a lower ram repla…
... . I have replaced upper rams, installed a lower ram replacement module and ...Cooking toastrack... the dreaded smellI powered up my Spectrum 128 (heatsink model) yesterday only to see what looked like an out-of-tune picture on the television. I'm using a scart adap…
... at the time was a Ram Turbo joystick interface and a ... experience with this kind of failure? I'd really not like ...Ram Turbo Interface with Kempston and Sinclair/Amstrad joysticksHi! Do you know how to plug and use two different joysticks with the Ram Turbo interface? [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000…
... two different joysticks with the Ram Turbo interface?
[url ...80K RAM UpgradeAn 80K RAM upgrade has been listed on sellmyretro.com (not by me). It is based on the one originally designed by Sandy Electronics and has their p…
An 80K RAM upgrade has been listed on ... /details/NEW-SCT-MODULE-EXPANSION-RAM-80K-FOR--ZX-SPECTRUM-4119 ...Issue 1 16K RAM bankFolks, I recently had a chance to fix a couple of Issue 1 boards, and learned the hard way that the chips in the 16K RAM bank have a different place…
... the chips in the 16K RAM bank have a different placement ... from 2 up have the ram chips lined up the most ... meaningless reports from the Fruitcake RAM tester, I finally checked all ...Wanted: RAM Turbo InterfaceHi guys I am on the lookout for a RAM Turbo interface so anyone has any going spare then please give me a heads up. Cheers
Hi guys
I am on the lookout for a RAM Turbo interface so anyone has any going spare then please give me a heads up.
CheersSpectrum +2 (grey) RAM issueHi, I?ve got a ZX Spectrum +2 (grey) with what I think is a RAM issue. I used to be able to load games very reliably by playing converted TAPs and …
... what I think is a RAM issue.
I used ... that device is a 128K RAM test firmware.
When ... [/url], page 4) means that RAM page 5 has an issue ... the PCB is for which RAM page?
I?m ...Loads of Microdrive cartridges on Ebay plus Vortex RAMI?ll be selling three bundles of eight Microdrive cases with four, used cartridges each, means 32 cartridges per bundle, here?s one of them [img]http…
... an untested Vortex SP 512 RAM expansion with CPU and ULA ...TR4/TR5 replacementHi guys, I've got another Spectrum I'm working on now - an Issue 4S this time. When I originally got it, I powered it up and did the basic tests a…
... a fault with the upper 32K of RAM. Not surprising, and I ... the voltages on the lower RAM IC's show they are ... still wrong on the lower RAM IC's, so I'm ...Video ZX Spectrum+ 48k<span>Good day ... is a bit of time that I try to fix my zx spectrum ... I replaced the ram 4116, all electrolytic capacitors ... but the monitor loo…
... zx spectrum ... I replaced the ram 4116, all electrolytic capacitors ... but ... the two spots in the upper left, because it's my ...ZX81 16KB Ram with Box & PolysUntested as listing says, ZX81 long gone. Grab a bargain. [url]http://www.ebay.co.uk/itm/-/391227085647?[/url]
Untested as listing says, ZX81 long gone.
Grab a bargain.
[url]http://www.ebay.co.uk/itm/-/391227085647?[/url]Another silly hardware idea - RAM Pack adaptorHow about a mini bit of PCB that adapts ZX81 RAM Packs to replace the address space of the Spectrum's ROM? I guess practically you'd need a way to…
... of PCB that adapts ZX81 RAM Packs to replace the address ... well just design your own RAM board.
Could have ...Turbo RAM Glitch or feature ?I have been testing a Spectrum [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000328"]worldofspectrum.org/infoseekid.cgi?id=1000328"]RAM Tur…
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 ?
thanksIssue 3B woesHello there, I currently have a Issue 3B for repairs around, it used to have broken upper and lower RAM, which I replaced with 41256-120 DRAMs (hac…
... used to have broken upper and lower RAM, which I replaced with ...Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... erase the contents of the RAM and to my surprise, the ... have caused such a sudden failure? I didn't attach any ...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 ...Speed (nano seconds) of memory chips ZX SpectrumThe ZX Spectrum uses 4116 memory for the lower memory, which can be replaced by other sorts or a whole, modern, module, but when searching for 4116 m…
... ?
Same for the upper memory:
TMS4532-3 Texas ... PCB) because half of the RAM was faulty, but how many ...Spectrum + 128K (Toastrack) Upper caseLooking for the upper part of the case for a Spectrum + 128K.
Looking for the upper part of the case for a Spectrum + 128K.Need some help repairing an issue 3 spectrumI am looking for some help repairing an issue 3 speccy, here's what I tried so far. The speccy is not booting up correctly, when using the diagnos…
... the diagnostic rom all lower ram ic's fail, the ic ... and z80 made no difference. Upper memory and logic is not ... .
Removed all lower ram, and turned the spectrum on ... works expect for the lower ram.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…
... boot system from SD card. Ram is 512kB, but current version ... eeprom for other small systems. Ram is 32kB only and current ... system ESXDOS use full 32kB ram + next 8kB swap on IDE ... also true ALLRAM mode with 16kB paging instead zx rom and ...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 ...Wanted: Spectrum 48k lower and upper case ( or just dead machine!)Hi all, for a project I'd like to buy a 48k rubber key upper and lower plastic case I don't need the keyboard membrane, keyboard or faceplate, ju…
... buy a 48k rubber key upper and lower plastic case
upper and lower plastic parts so ...Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …
... was something about the upper part of RAM and that crashes the ...Z88DK v1.99B ReleasedAt Sourceforge: https://sourceforge.net/projects/z88dk/ It's been a year since the last release so it was time for another. This is another tran…
At Sourceforge:
https://sourceforge.net/projects/z88dk/
It's been a year since the last release so it was time for another. This is another transitional release on the way to version 2.0 and hopefully we'll get there for the next one ...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 ...Issue 2 problem.Hi all, I'm trying to repair / upgrade an Issue 2 Spectrum for a friend, but have come accros the following problem. When I power the machine …
... 16K fitted the sinclair ram test works and says ... 16K ram which is completely working. Fit the upper 32K ... and the RAM test will fail ... address range or sometimes upper address range. This tends ... maybe both sets of RAM are getting enabled at ...
