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Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
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Where can I source replacement TMS4532-20NL4 chips if it ... *1 chip inside - with the lower or upper half in working ... -
which zx-spectrum games uses 1bit sound samples?hi! I'm looking for zx-spectrum games using 1bit sound samples. Compairing with msx, which has far less games available than zx-spectrum, there are f…
... would correspond to 1k of memory per second of speech. If ... 0.5k of memory per second of speech. The lower the sample ... -
which zx-spectrum games uses 1bit sound samples?hi! I'm looking for zx-spectrum games using 1bit sound samples. Compairing with msx, which has far less games available than zx-spectrum, there are f…
... to provide maximum flexibility between memory used by the sample and ... frequency from a 11kHz or lower sample-rate, and of course ... -
Spectrum real speed testI don't have a real Spectrum, but I have a Romanian clone (HC-91). I always believed it was a perfect clone of Spectrum, but it turned out not to be…
... does not use the contented memory.
But my Romanian ... to have ULA-CPU contented memory, because if I ran the ... video RAM, the speed is lower. -
spectrum +2 tape recorder is dead helpMy +2 grey's tape recorder is not even coming on when i press play so i was wondering with the 5 cables going into a plug and then connecting on to a…
... a mechanical one and from memory the light comes on. If ... swap top sections over, although replacement isn't as neat and ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... and to a certain extent, memory. It had a PC Keyboard ... that it can be a replacement ULA.
ZX Prism ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... and to a certain extent, memory. It had a PC Keyboard ... that it can be a replacement ULA.
ZX Prism ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... ZX Prism a plug-in replacement for the ULA as it ... also have to replace the memory, CPU and video circuitry - so ... -
Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... eight different shifted positions in memory. Select the graphic definition to ... of the table and the lower byte can be the byte ... h' or 'dec h'. The lower 3 bits of the pixel ... -
AGD 2.6 WoesThis was originally in the New Game Ideas section but thought this would be the best place to post this: I'm no programmer, hence i'm using the exce…
... make AGD utilise the extra memory on a 128k?
lower platform.
Also, is ... in Basin, load it into memory and point to it (poke ... -
Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... The spectrum is purely a memory mapped pixel display and drawing ... data for the letter into memory, where each byte represents ... involves POKEing eight bytes to memory per letter, each byte representing ... sprite is located. Use the lower three bits of the x ... -
The SAM CoupeDoes anyone own one of these? I remember being jealous of a friend who bought one of these machines which had a disk that made the system compatible …
... in Sprinter 2000 as Video memory) and Yamacha Soundchip from Atari ... original SAM COUPE case (as replacement of main board - only for ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... /> The upper RAM (like the lower) is soldered in, so I ... not trying to step through memory, or something is interfering with ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... focus on finding out which memory from the contended bank is ... near 5V. If it is lower than, say, 2V, change C27 ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... wire up an SRAM as lower RAM. But to fit on ... be easiest to find some replacement 4116's now (sorry to ... about what to use as replacement before soldering in sockets :cry ... -
Pac-Man EmulatorMy Pac-Man Emulator for the Spectrum +2A/+3 is now available for download from: [url]http://simonowen.com/spectrum/pacemuzx/[/url] You'll need to su…
... Spectranet's memory mapping to place the code at the lower addresses ... -
Pac-Man EmulatorMy Pac-Man Emulator for the Spectrum +2A/+3 is now available for download from: [url]http://simonowen.com/spectrum/pacemuzx/[/url] You'll need to su…
... Spectranet's memory mapping to place the code at the lower addresses ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... .
Removing the lower RAM was time consuming and ... m almost certain is a lower RAM failure (it only ... a go at an SRAM replacement on one of the ... line connections from the lower RAM to the ULA ... on the Spectrum with the lower RAM removed, it does ... -
Canny use of the 'r' register?Seeing Sokurah's code in the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=583188#post583188"]crunch sound thread[/URL] has made me th…
... cause some parts of DRAM memory to not be refreshed anymore ... . Probably won't work for lower RAM since ULA is refreshing ... -
Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... in and out of contended memory on the 128K machines. At ... routines in the same shared memory space, all with multiple entry ... of RAM, copy it to lower RAM, then page the original ... run the routine in contended memory. It's not an ideal ... -
Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... in and out of contended memory on the 128K machines. At ... routines in the same shared memory space, all with multiple entry ... of RAM, copy it to lower RAM, then page the original ... run the routine in contended memory. It's not an ideal ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... TRACE: composite video signal
LOWER TRACE: Z80 INT signal
lower trace), and to my surprise ... program running in contended memory, writting to contended memory (or at least ... the upper trace. The lower trace shows the state of ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... board for speccies with socketed lower ram would almost certainly work ... than a set of 8 replacement 4116s if you had them ... -
Anyone heard about the Chameleon before?Commodore haters: please skip this topic, allthough it's definately Speccy related! ;) [url]http://www.syntiac.com/chameleon.html[/url] Someone mad…
... can emulate 1541's, REU memory, speed up the CPU and ... the Chameleon is a direct replacement for) or final cartridge and ... ; make it a full machine replacement? :-? (like that docking board does ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... it another time) the memory corruption problem seems to ... CPU to refresh the lower RAM when the ULA ... that first filled an memory area (I usually used ... the upper part of lower RAM), so the problem ... as it accesses those memory locations (probably starting up ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... refresh (or otherwise) of the lower RAM. If the description is ... nor whether this could cause memory corruption nor if it does ... have been what stopped the memory corruption instead? The 12V and ... arrangement of connections between the lower RAM and the ULA on ... -
House of Hell gamebook conversionAs there's potentially several people working on this I thought that I'd set up a thread in the correct section, rather than it continuing in Wanted …
... a key to switch the lower display between showing the stats ... /> Also I think due to memory constraints it's best to ... -
Testing needed (+demo)Hi, As my "next" project is mostly finished (still hoping to get it out next week), I realised I need some testing. So here's a demo. [url]http://…
... to memory using pointers rather than arrays, etc.
The lower ... -
Arcade Game Designer 2.0 releasedI know dozens of you downloaded the previous version of AGD. Well, you can put it away now because I've made some major improvements to that version…
[QUOTE=NRA;590712]Hello Jonathan)
I've played a little and think that 'charset' is ok, but I personally find no use for 'palette' tab yet. No nagging, just IMO.
Ok, so now I can sacrifice an unused letter as a 8x8 UDG instead of 16x16 ... -
BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... that occurs when the lower RAM isn't working ... traces to disconnect the lower RAM so as to ... this method all the lower RAM ICs can be removed ... shouldn't.
Replacement 4116 ICs aren't always ... possible to replace the lower RAM with a fairly ...
