-
I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…
... if going to access memory in the next cycle ... both interface to the memory, meaning that they have ... why part of the memory is contended.
Alternatively ... and the memory, so that the ULA can read whenever ... it wants, and can write to memory ... -
How to move the location counter backward with GNU binutils?I've converted a 8000-line assembler source from Pasmo to GNU binutils. It was not difficult. It's the first time I use GNU binutils. In my code t…
... two differents zones of the memory. With Pasmo I just ... of the compilation) into a memory address, ready to be ... the_symbol`, therefore updating the same memory address every time, and ...
I've searched and read the binutils documentation but found ... -
Spectrum Ram UpgradeHi, I am looking to upgrade my 16K Spectrum to 48K. I have some 41256 dram chips from an old QL memory expansion, can the Spectrum us the large…
... am looking to upgrade my 16K Spectrum to 48K.
memory expansion, can the Spectrum us ... -
[NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…
... ’
Emulation of the contended memory timings.
Pixel to pixel ...
Formats supported for read: PZX, TAP TZX CSW v1 ... -
48k Memory MapIs there a link or info anywhere that explains the 48k memory layout? My game uses double buffering and I'm trying to decide where the best memor…
Is there a link or info anywhere that explains the 48k memory layout?
My game uses double buffering and I'm trying to decide where the best memory location should be. -
Searching for correct Betadisk 48k TR-DOS v4.12 ROM (Save ROM via TRDOS-Prompt to Disk)Hi, I have two ROM-Files which should be read out from an original Betadisk 48 Interface TRDOS v4.12 (ROM-Size 8k). But when I compare them, they…
... ROM-Files which should be read out from an original Betadisk ... 8k Size ROM anymore to read out, because my Beta-Disk ... /> Vision GUI with ROM-size 16k.
Someone have an ... it to Diskette.
(Yes, 16k size, as I´m not ... -
Sinclair QL bad memoryI googled around trying to see if there was a resource for this but didn't really find anything specific. I have a QL with the white screen proble…
... screen problem which indicates bad memory, so I plopped a Minerva ... you addresses of the bad memory...Problem is that doesn't ... help me identify which IC memory chip it is. Is there ... " a good chip on each memory chip but the only result ... -
Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... various options for loading from memory card.
What do ... to find their way onto memory card? -
The right size for Standard Betadisk 48k TR-DOS v4 ROMs is 8k and not 16kHi Emulator-Authors, I just want to clarify, that Betadisk 48 ROMs TRDOS v4 ROMs has size of 8 kByte and not 16k Byte. Only TRDOS v5 (of Beta…
... of 8 kByte and not 16k Byte.
Only TRDOS ... 8k ROMs together to one 16k ROM (e.g. with MSDOS ... +TRDOS48K TRDOS.ROM).
This 16k ROM can than be used ... -
IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…
... go on about how they read from and write to addresses ... how do they differ to memory locations...?
Can someone ... -
The history of ESXDOS, the DivMMC and the DivMMC EnJOY![img]http://benophetinternet.nl/hobby/divmmc_history/1%20esxdos.jpg[/img] These are the stories behind esxDOS, the most popular operating system e…
... to life.
A must read for everyone who is interested ... br /> - DOS services (open file, read/write sectors, etc, etc, etc ... !
- swap partition
- virtual memory up to 4Mb
FATWare was read-only but the most easy ... -
Weird crashing problemOK, got an odd (to me anyway!) problem. 16k Spectrum, appears to work fine, it starts up, go to load a game (Trans Am, Cookie, Jetpac etc), the game …
... odd (to me anyway!) problem. 16k Spectrum, appears to work fine ... ? I thought it might be memory but I've done the ... -
SINCLAIR ZX80 + 16K ORIGINAL EXPANSION ROM!!!http://www.ebay.co.uk/itm/-/171965470419? Here you are my ZX80 in perfect working condition. It was upgraded in 1981 with the new rom and keybo…
No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…
... magic wand to remove the memory contention, what software would break ...Macmillan Learn to read - BODYSWOP - labelled BODY PARTS - review copyI've had a cool find... a tape - no cover - printed 'LEARN TO READ - Body Parts' Review copy .... It is Macmillan's 'Bodyswop' but I presume a pr…
... - no cover - printed 'LEARN TO READ - Body Parts' Review copy ....
little help with archivebeen trying to access the magazine archive to browse through some of the old mags i used to read. just a walk down memory lane. is the log in details…
been trying to access the magazine archive to browse through some of the old mags i used to read. just a walk down memory lane. is the log in details the same that i use for the forum or something different? tryed my forum details but failed. please helpWay of the Burgle (2008) - Incomplete XFAWorld Game + DownloadDownload: http://1drv.ms/1IN8l3M Hello there everyone! ^_^ I doubt many (if any) of you will remember me, but once upon a time I used to post h…
... was trawling through some old memory sticks and whatnot tonight and ... for taking the time to read this post and I hope ...Elite - Save data complete map[code] $0000 Commander Name $0001 Commander Name $0002 Commander Name $0003 Commander Name $0004 Commander Name $0005 Commander Name $00…
... change anything by modifying the memory directly so loading from tape ... . It's loaded into memory but never read by the program. When ...Tasword file format - for transfer to/from PCHaving worked out that it's dead simple to load in and read .TXT files from the memory card on a DivMMC Enjoy!, I'm keen to see what else can be done…
... load in and read .TXT files from the memory card on a ... save and load from the memory card and stick .TXT extensions ...How R@RE was the 16k Speccy?I'm curious about the ratio of 16K to 48K models sold - the 16K seems to be a pretty rare beast these days. All the people I knew who had 16K Speccys…
... curious about the ratio of 16K to 48K models sold - ... the 16K seems to be a pretty ... people I knew who had 16K Speccys either upgraded it, ... of time. As decent 16K software was quite thin on ... />
When was the 16K model discontinued as well?
New debugger features for ZEsarUX-4.1Hi I haved added new breakpoint conditions on ZEsarUX, the following 8 allow to put a breakpoint when accessing memory or i/o ports: MRV: value…
... /> MRV: value returned on read memory operation
MWV: value written ... /> MRA: address used on read memory operation
MWA: address ... write memory operation
PRV: value returned on read ... /> PRA: address used on read port operation
PWA ...New Game - Cuboid CaptorWell, here it is, the (somewhat underwhelming) Cuboid Captor! This game was written for the ZX DEV 2015 competition and (to my knowledge) was the …
... my knowledge) was the only 16K game entered into the competition ... meant to be 3D but memory/time constraints forced it into ... Captor is probably the only 16K game to feature sampled speech ... for good reason: the contended memory makes it sound like the ...NEW GAME - Thunderturds 2 (16K edition)[img]http://forum.retro-computers.co.uk/uploads/default/original/1X/4b5e63f7039987ca157e693f5ab4eb278df60038.gif[/img][img]http://forum.retro-compute…
... [/img]
Heres the 16K version of Thunderturds 2. A ...help with broken +2 greyHello, the other day I was trying to record sounds from my grey +2 "sound" socket to an old cassette recorder. Suddenly the screen went to a solid…
... missing the "contended memory" pauses which I've read about in the ...TommyGun with Debugginghttp://goo.gl/HfSXev?gdriveurl Ok, so this is a pretty big release for me and I have added a lot of stuff into the code editor. Mainly of course …
... they are doing; then please read on.
[u][b ... accurate.
Does not have memory contention.
Does not have ... people probably won't even read this far.
I ...Who read announcements?Had 23 views about a new issue of our magazine in two weeks, which really disappointed me. Maybe the announcement section is not the right place to "…
... is there a way people read it without being counted as ... not even interested just to read the announcement about a new ...A book I would like to read.In the late 80s I couldn't get away to the Amiga quickly enough, mainly for the graphics if I'm honest. So I find it very interesting that some of us…
... />
I'd love to read an interesting memoir of these ...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…
... ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano seconds ... refreshed, the contents of the memory will get lost? 15ns? ...
Same for the upper memory:
TMS4532-3 Texas Instruments ...Redesigning the ZX Spectrum 128k - A lifelong dreamHello, I am myPinballs (Jim) and i run a small business here in the uk making replacement 8-bit hardware pcbs for arcade pinball games as well as…
... /> If you would like to read more about this project i ... compatible
• 8 pages of 16k ram 128k total
• High ...
