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BBC MicrosAny speccy peeps on here also have a collection of Beebs ? :) I have a fair few (and some accessories) , il try to get some pics later if anyone is …
... out both the upper and lower portions or Ram to see if ... -
DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …
... 48K Speccy. Replaced too upper 32K RAM with one 32K SRAM chip ... .
Upper was piece of cake ... , but lower RAM (what is ... -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... . I wouldn't replace these RAM chips until the power circuit ... upper bank. Traditionally these are 64Kx8 chips with half of the RAM ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... coil on it on the upper right corner that i haven ... timings in the heatsink's RAM (on some of them of ... -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... the screen2 in the upper 16K of RAM, so we can access ... ]scrcopy[/b] Copies current screen RAM into second screen (Very slow ... -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... whichever screen was paged into upper memory.[/QUOTE]
Yes ... statement to print to the upper memory screen.
From ... so called "silicon disk" or "ram disk" however, the command syntax ... -
WTF is this???[url=http://cgi.ebay.es/Spectrum-128-Emulator-ZX-Interface-2-ROM-Cartridge_W0QQitemZ170254558796QQihZ007QQcategoryZ50223QQrdZ1QQssPageNameZWD2VQQcmdZ…
... doesn't add 80K of RAM et al. merely 128K BASIC ... of ram disc in the upper end of the normal 48K RAM.
RAM - especially as the guy who ... -
Custom SAVE Routine work on emulators?Hi, I'm developing a SAVE routine derived from the one present in ROM 48K, and I'm trying to get it work on several emulators (X128, Spectaculator, …
... also place the routine in upper memory (8000h+) as the first ... priority on reading the lower RAM over the CPU. -
A 64K Spectrum?? Is this real?I have seen avertised on Ebay today two boxed ZX Spetrum Rubber Keys. One 16K and the other a 64K upgraded model?? Is this for real??? [url]http://…
Well, I repaired a Issue 2 Speccy putting 4164 chips on the upper memory, so I have a 80K RAM Speccy ;-) -
4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?
... replacing it with a static RAM (32K x 8 bit, only ... multiplexed address bus for lower RAM, so I connected an 8 ... reads / writes to the lower RAM. Snow gone, normal operation 100 ... go. Next I replaced the upper 32K with another single SRAM ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... machine stack in the upper part of RAM. Overwriting that will also ... brief search, I found two RAM-testing programs today written in ... /> No doubt there are more RAM-testing programs out there.
RAM (like the system variables), test ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... tests the lower 16K of RAM. (Select (S)OAK test)
The second program tests the upper 32K (both use a machine ... be suitable for testing the RAM of any 48K speccy. -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... common failure modes of Spectrum RAM with that test. I ... least for the 4116 lower RAM) the most common failure ... for bit fade, once RAM has passed the inversion and ... fill tests, set the RAM for an inversion pattern, ... for the 4116 RAM, and the upper 32K for the ... -
4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?
The 4116 RAM usually causes it, because it' ... test on startup. If the upper 32K has a fault, sometimes ... left of the PCB. The upper 32K is in two rows ... -
1K Minigame : 3D RacerLast year I started to code a 3D Racer in 1K. The print of the road was however quite flickery so I put it away to pick it up this week again. I deve…
... game is 48K. It uses upper memory for speed.
RAM and alter it on the ... -
issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
... " from the screen to the upper memory. As the Spectrum enters ... writes certain values to the upper memory. Because the resistors are ... data coming from the lower RAM to the ULA. When the ... values back out of the upper memory. But you'll find ... -
Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…
... the keyboard membrane). Your upper 32K of RAM is also almost certainly ... program to test the upper 32K of RAM. You may need to ... failed chips easiest. Remember Spectrum RAM is one bit wide, not ... -
Photos of MODIFIED ZX SpectrumsIf you have ZX Spectrum/clone with any modification(s), please release photos: (or send me your photos to --SPECCY(a)SEZNAM.CZ--, I upload all to my …
Lower 16K RAM (the 'video RAM') replaced with a static RAM:
[URL ... this machine, I replaced the upper 32K with an SRAM as ... -
Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... , as if DOS is active, RAM Page 7 is here instead ... will switch in the correct RAM bank to the top 16K ... just need to specify the RAM bank (0-7) you want ... dos routines from the upper bank (as ram page 7 is active ... -
New BUZZSAW+ Demo, No.2OK everybody, here's the latest demo of [I]Buzzsaw[/I]. This includes the title screen I wrote in Corfu with control selection, some new sprites and…
... careful what goes into slow RAM.[/QUOTE]
... wrong here, but slow RAM is only slow while the ... code is running during the upper and lower border, at ... free to run in low RAM (and read sprite/font ... like music players in slow RAM, until very recently when ... -
Screen display at resetJust something for curiosity: When the Spectrum is reseted by for example NEW a very typical screen is shortly displayed. [IMG]http://i33.tinypic.c…
... OF RAM is set to the working memorybanks.
So if upper ... -
Screen display at resetJust something for curiosity: When the Spectrum is reseted by for example NEW a very typical screen is shortly displayed. [IMG]http://i33.tinypic.c…
... OF RAM is set to the working memorybanks.
So if upper ... -
I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …
... was added together with the upper 32K RAM chips? Which would seem ... -
I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …
... was added together with the upper 32K RAM chips? Which would seem ... -
Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... available on all the 4116 RAM chips. If -5v is missing ... wide (for both lower and upper memory). The lowest 16K (addresses ... ) are all in the 4116 RAM. Every address uses every 4116 ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... change!)[/QUOTE]
The upper address bus decoding is a ... the CPU is accessing the ram, the databus is is use ... handling contention on the palette RAM. This RAM will basically be sending ... -
Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... /> For clarity: with the 4116 RAM chips removed you will have ... that. A Spectrum without the upper 32K RAM works just fine. There ... logic chips to control that upper 32K, but they can be ... -
Windows 7 Installation issuesNeed some more help chaps as I'm totally bloody snookered on this one... My PC spec is this :- Intel Core i7 2.66GHz CPU. nVidia GTX-260 1792Mb Gai…
... -bit release, with that much ram on your grahics card it ... I have no idea the upper and lower limits of. EDIT ...
