-
Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…
... ?) behind ULA's spectrum screen memory interpretation?
6144 bytes ... behind this implementation? Why screen memory isn't interpreted continuously?
128K memory testingDuring a mad half hour I decided to write a little memory tester program in BASIC using the information from the 48K service manual. Now I was wonder…
... decided to write a little memory tester program in BASIC using ...Spectrum Basic InterpreterHello. I started this days a strange project: an interpreter of the Spectrum Basic that can run in a Spectrum. Here is a very preliminar version: […
... a ROM replacement, it runs in RAM. It costs some memory, but ...Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... sure is caused by bad memory, and the other - well, perhaps ... in IC sockets in the replacement.
Any tips for ...Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
What is the best replacement transistor for the obsolete ZTX650?
I've read that TIP31 will do the trick.
Is there a decent equivalent from the BC or others transistors?My security program doesn't like Spin or Spectaculator?I just tried installing both Spin and Spectaculator, and both of them triggered the security alert on my PC's internet security software. When I tri…
... tried to "write into the memory of another process by installing ... , although it had a substantially lower risk score for some reason.problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... are the pictures of the memory chips lower 16KB and upper 32KB ... /> I want to change this memory with standart 4116 and 4164 ... memory chips.
but i don' ...Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…
... makes me wonder: How much memory does a Speccy have, included ... the memory used by the machine itself ...Issue 1 32K Memory Upgrade neededHi folks, as the title suggest im looking for the original sinclair memory board to make it 48k from 16k. Any other form will do or even instructions…
... looking for the original sinclair memory board to make it 48k ...List of POKEs and PEEKs/cool memory addressesI was wondering if there was a list of cool memory addresses to POKE and/or PEEK. For example, I know that PEEK 23674 tells you how long a Speccy has…
... was a list of cool memory addresses to POKE and/or ... Spectrum ROM Disassembly', but for memory addresses instead of assembly routines?Vague memory of a gameHi all, something's been bugging me on and off for ages. I once had a speccy game that I can't remember the name of. Sadly I can't recall many of the…
... a bit hazy, but my memory isn't what it was ...Laptop memoryIf anybody is interested before it goes on Ebay.... 2 x 512MB Hynix PC2-4200 memory modules Hardly used - I upgraded the memory a couple of days af…
... x 512MB Hynix PC2-4200 memory modules
Hardly used ... - I upgraded the memory a couple of days after ...Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... run machine code from the memory area used by the display ... you were really out of memory and some part of screen ...Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... way to disable all onboard memory - like ROMCS but for the ... whole memory map?
Translating the ... piece of on-board memory and map external memory over it. CP ...What I hate about computers and/or video gamingYesterday I spent approximately four months (subjecively that is, objectively it was around two to three hours) fixing my mate's PC. I won't bore you…
... upgrade graphics cards, hard drives, memory etc. You almost always REPLACE ... of sound and graphics cards, memory, CPU speeds and types, etc ... the 360) XBox. My current (replacement) drive is now having trouble ...Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…
... am just messing with paging memory in and out (not achived ... 7F LD BC, NN Hardware Memory Switch
ED 78 IN ...Adventures in Programmable Logic, Part 1So I have a couple of Xilinx CPLDs, and I've downloaded the Xilinx programmable logic IDE (WebKit ISE, they call it). All 1.2 gigabytes of it. Plus S…
... allow memory to be paged in in 4K pages into the lower ...SPIN's breakpoints - an overviewAs quite a few people have been asking how to set breakpoints on memory write etc. in SPIN, here's a description of the way the breakpoints work. Get…
... how to set breakpoints on memory write etc. in SPIN ... matter where PC is in memory:
[code]
... a condition that reads memory, this can be done ... on its own without checking memory / IO status but the ... /> ...which masks off the lower 8 bits of the read ...Memory SticksI know some of you keep old PCs alive. 72 Pin Simms I've got half a dozen, some in pairs. Any interest and I'll try and figure out what they are. …
... will take PC100 if the memory switches down.) - Lowest prices paid ...The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... CMOS which has much lower output impedances, and strong ... the registers in the lower 16K and buffers in ... 't need to be memory mapped. This will reduce ... arrange the lower 16K of the Speccy's memory, and ... is much slower than one memory access. However, copying ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... how the ULA replacement fetches the bytes without any memory contention would ...Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…
... a problem with the high memory of a 4B issue.
memory and one of them was ... changed the wiring for the memory settings from OKI and H ... />
If i insert the memory from a working speccy (with ...Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…
...
twice the amount of memory than can comfortably fit. While ... the processor) always 'sees' the memory as 16K of
ROM ... program to "disconnect" the ROM memory completely and to write to ... the lowest 16 KB of memory with proper paging?
I ...Packing numbers in as least memory as possibleI am writing some code for drawing vector lines etc. on the screen. These need to be stored in memory and I want to pack them in a smaller area as po…
... need to be stored in memory and I want to pack ...Japanese-only or lesser-known games you playedI've noticed by their comments there are a few people on WOS (hi Vertigo, dm_boozefreek etc.) who have played titles which were either never released…
... and I have a hazy memory of playing quite a few ... Japanese version's graphic her lower part is naked. There are ...Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... ..
The Speccy 48 ULA Replacement is *almost* here ;)
Anyway, the machine with ULA replacement doesn't quite boot up ...Important for Game/Demo DevelopersHello Spectrum-friends, I just finished our new Disc-Magazine SCENE+ with newest games, demos, graphics and sounds from the Spectrum Scene. However,…
... /> 1. If you have enough memory, do not use RAM below ... the memory and have to put RAMTOP to 24499 or even lower ... as possible. You can save memory by avoiding long file name ...Replacement loudspeaker for rubber key 48kI'm fixing one of my rubber key 48k. Just ordered a membrane for it but I also need to find a replacement loudspeaker for it. The original some how q…
... also need to find a replacement loudspeaker for it.
The ...Wanted: RGB SCART cable for heatsink 128K and ULA for issue 3 ZX SpectrumHi all, I'm after an RGB SCART cable for a heatsink 128K as well as a replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory). Can an…
... replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory ...
