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Memory Map/ContentionHi I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scrolling…
... this a correct map for memory contention?
Address Size ...
5B00-7fff 08k Contended Memory
8000-FFFF 32k Fast ... Memory (well normal memory really :) )
Cheers ... -
Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
... in the day, but my memory is hazy as we mostly ... all, despite it being a modern Sony widescreen. I have to ... -
Sothebys Modern Art saleI had a recent gander at the brochure for Sotheby's next modern art sale and this was one of the items up for grabs: [url]http://www.geocities.com/w…
... brochure for Sotheby's next modern art sale and this was ... -
SjASMPlus cross compiler of Z80 assembly languageHi! I want to present you cross-compiler of Z80 assembly language: [B]SjASMPlus[/B]. [SIZE="4"]Features:[/SIZE] [LIST] [*]Z80/R800 documented and un…
... by 2-3 seconds on modern computer
[*]Code inlining through ... to define data structures in memory more easily (use STRUCT pseudo ... -
replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…
... help an idiot build a replacement PSU for the +3 / +2a ... -
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 ...Modern equivalent of The Biz?Are there any modern games to do with managing a band, preferably tongue-in-cheek the way The Biz was? It's a great game although it could do with s…
Are there any modern games to do with managing a band, preferably tongue-in-cheek the way The Biz was?
It's a great game although it could do with slightly better balanced gameplay, and modern audio-visuals are always a nice extra.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?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 ...Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…
... that mean?
For modern hardware and operating systems (32 ... address a certain amount of memory that gives the title, but ... of course use 16-bit memory addressing.
So, why ...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 ...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 ...Help! Need Vesa or glide or whatever help (Carmageddon)Since being forced to run Windows XP instead of Windows 98 a few months ago (new hardware made it necessary), I've spent the odd hour or two here and…
... being a distant memory, and these .exes not supporting modern standards like ... run Carmageddon on XP and modern 3D cards, but again it ...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 ...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 ...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 ...DictatorOne of my favourite games. I'll try and get it on this laptop again later tonight. Maybe that "modern" pc remake that I've used on my old, old PC. …
... again later tonight. Maybe that "modern" pc remake that I've ... police reports, and relying on memory, I think i could draw ...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 ...
