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quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... an address (if referencing free RAM). Any string names can ... two different segments of free RAM). Although the routine will ... COPY string to RAM or RAM to string or RAM to RAM
GO ... or destin location if in RAM;
b$=source string expression ... -
Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…
... />
I carried out the RAM test I found elsewhere on ... -
Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... with own external rom memory 16kB, based on FDC controller WD1793 ... - #3DFF then BETA128 connect external 16kB rom with system TR-DOS ... CPU jump to ZX ram (out of low 16kB adress space).
16kB rom pages...)
[B ... -
Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…
... contain 16kB rom organised as two 8kB rom pages + 8kB ram. Interface ... rom is connect in low 16kB of adress space. Magic button ... -
Replacement Spectrum +3 RAM ChipsHi all Bought a +3 last week with a RAM issue, so I have removed the old chips, added sockets and now just need a full set of chips to get her back…
... +3 last week with a RAM issue, so I have removed ... -
Video failureHi i cant find the failure of my spectrum 48k issue 4a, i thought it was ic6 or ic13 but the memory seem to have the right values. When i turn it on…
Hi
i cant find the failure of my spectrum 48k issue 4a, i thought it was ic6 or ic13 but the memory seem to have the right values. When i turn it on it shows:
[IMG]http://t.imgbox.com/adxOE1D0.jpg[/IMG]
any ideas, what could be? -
DIY Issue 1 Internal 32K RAM expansionFollowing on from the information in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40173"]this[/URL] thread, I finally figured this ou…
... of the Issue 1 internal RAM module.
The pinouts ... when the top 32K of RAM is addressed. Here's a ... the machine saw 48K of RAM, verified with PRINT PEEK 23733 ... machine is seeing 48K of RAM now and that there were ... -
Buying ram for W7It's been a long time since I bought any ram for a PC (I think I bought a few DIMMs when they first appeared) so I thought I'd ask here to make sure …
... time since I bought any ram for a PC (I think ... /components/memory-pc/ddr2pc2-6400800mhz/ram-804gk.html"]these DDR2 DIMMs ... -
From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... question is related to "quick RAM copy using LET in Basic ... buffer".
- A zone of RAM with 160 bytes corresponding to ... that stores the v$ dim RAM position.
When ... readed from RAMPEEK v$ dir RAM...
[INDENT]POKE dir,byte ... -
ZX81 internal RAM upgrade?It's only a matter of time before I kill my ZX81 due to this slack ram pack :( Is there a tutorial available that will allow me to upgrade my RAM to…
It's only a matter of time before I kill my ZX81 due to this slack ram pack :(
Is there a tutorial available that will allow me to upgrade my RAM to 32k or maybe even more? -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... that write to an external RAM chip, then using a ... memory to the external screen RAM.
Could it ... top half of a 16K RAM that overlaps the second ... that data into its video RAM space (which is how ... force it into the uncontended upper memory so it can ... -
HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …
... /microcontroller respond to any video ram change in the ZX Spectrum ... /> No analog circuits, no video ram reading and contention problems.
ram, with HDMI output...
Upper case in INKEY$Hi, how I get upper case in INKEY$ ? Is there a POKE ? Thanks.
Hi,
how I get upper case in INKEY$ ? Is there a POKE ?
Thanks.Simple Question! RAM InterfaceI was messing around on my spectrum yesterday and blew it up! Im sure it has to do with the RAM joystick interface I bought but hadn't tested. Is the…
... has to do with the RAM joystick interface I bought but ...Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
... But since this is in RAM we can later redirect ... best "safest" address in RAM for such a table?< ... (incl. Speccy) do a RAM test
at startup. ... table before
the RAM test / it will get overwriten ... Bummer. What if we replace RAM checking
code with ...Spectrum Spares in my Shop!Hi everybody, Excuse the spam please. :) I've update my Spares section of my shop here: [url]http://www.mutant-caterpillar.co.uk/shop/index.php?cPa…
... the usual stuff like RAM chip (lower 16K, upper 32K, all 128K ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... with original PSU & 16k RAM pack actually worth here? If ...For Sale?? Offers? Spectrum ZX81, PSU & 16k RAMHi all I've got a ZX81, 16k RAM pack & original PSU here I purchased sadly it won't work with my TV and I don't want to hack it apart to make compos…
... 've got a ZX81, 16k RAM pack & original PSU here ...RAM issue for potential 48k buy?Hi guys I've got a 48k in my sight for ?20 but... it has an issue: [QUOTE]"I tested the computer and only displayed a distorted screen. Coloured …
... />
Would this be faulty RAM chips? I've seen similar ...Wanted: ZX81 boxed with 16k RAM PackI'm looking for a clean, working and good condition ZX81 with original Sinclair 16K RAM Pack. Would prefer if it was in a box. Oh and if you have 3D …
I'm looking for a clean, working and good condition ZX81 with original Sinclair 16K RAM Pack. Would prefer if it was in a box. Oh and if you have 3D Monster Maze that would be the icing on the cake, thanks.Is my ZX81 RAM Pack OK?Hi guys I've just taken my 16k RAM pack apart to give it a clean inside and out and i noticed these strange burn type marks!? [IMG]http://s7.postim…
... 've just taken my 16k RAM pack apart to give it ... this burn marks!? Is my RAM pack damaged I haven't ...48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
... points me towards checking the RAM.
I have entered ...Spectrum stuff for sale (ZX81, RAM pack, Tapes... etc)Selling the following: [IMG]http://s26.postimg.org/uk0ntdsq1/IMG_20140902_205737.jpg[/IMG] [IMG]http://s26.postimg.org/ronkmioq1/IMG_20140902_20575…
... original too)
ZX81 16k RAM pack - Working
Spectrum tapes ...Early ZX80/81 RAM Pack???Hey all I got given this RAM pack... It doesn't work (i know why now) but compared to my RAM pack this one is really strange... Is this a ZX80 RAM p…
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I got given this RAM pack... It doesn't work ... now) but compared to my RAM pack this one is really ... strange... Is this a ZX80 RAM pack or something as it ...Help with 128k greyHello friends, need some help here on try fixing a +2 grey spectrum128. To keep it short, opened the case and the voltage regulator was missing, the …
... I desoldered all the ram chips and after testing ... where faulty. Replaced the ram chips and powered up ... eprom fitted and... "lower" ram test passed. Then an ... suggest an ic 22 failure (uncontended ram) but I'm sure ... it is not the ram chip. Checked the socket ...The complete Manic Miner RAM disassemblyHot on the heels of the [url="http://skoolkit.ca/disassemblies/jet_set_willy/"]Jet Set Willy disassembly[/url], here is [url="http://skoolkit.ca/disa…
... /manic_miner/"]The complete Manic Miner RAM disassembly[/url] (Bug-Byte version ...Interface 1bis RAM Drive modificationAll Interface 1bis users I hope I am not interfering with Dan, but I saw on his site that he has a RAM Drive upgrade/modification for the Interface …
... site that he has a RAM Drive upgrade/modification for the ... have an on-board 128K RAM drive, the user must install ...Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…
... buses and writes directly to RAM, instead of the CPU requesting ... instructions then writing them to RAM). In this case, the test ... whole thing with changing the upper 8 bits of the port ... serial flash without requiring nonvolatile RAM (which means you have to ...
