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ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
... Zx Spectrum 48k working as 16K , it came like this from ... -
ZX Spectrum upper RAM module (4532/4164 replacement)Following the [URL="http://zx.zigg.net/LRR/"]lower RAM replacement module[/URL], there have been quite a lot of requests for something similar for th…
... ="http://zx.zigg.net/LRR/"]lower RAM replacement module[/URL], there ... ="http://zx.zigg.net/LRR/"]lower RAM replacement module page[/URL ... the same circuit as the lower RAM replacement and emulates dynamic ... you want to upgrade a 16K Spectrum and will need the ... -
Pimping an Issue 4SSo theres this 4S I have, its been a pain in the backside for ages, this and that going wrong then I stupidly broke it properly by inserting a keyles…
... wrongly and blowing all the lower ram and the regulator. So ... now the lower ram is all socketed and ... when he comes back to replace the regulator and heatsink, new ... rid of the modulator and replace with a phono socket for ... -
Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…
... won't load anything over 16k. It is an Issue 3 ... 3D Starstrike: 4 - Out Of Memory
On Driller: M - RAMTOP ... -
Beau Jolly Value Pack 16k[URL="http://www.worldofspectrum.org/infoseek.cgi?regexp=^Value+Pack+16K$&pub=^Beau-Jolly+Ltd$"]http://www.worldofspectrum.org/infoseek.cgi?regexp=^V…
... /infoseek.cgi?regexp=^Value+Pack+16K$&pub=^Beau-Jolly+Ltd ... /infoseek.cgi?regexp=^Value+Pack+16K$&pub=^Beau-Jolly+Ltd ... -
Miscellaneous Sinclair stuffIch had quite a lot of stuff with me at the Wittenberg meeting and came back with much less. Now I still have for sale: - Currah uSpeech boxed with …
... -profile keyboard for 16K/48K boards, tested, on the lower part (would ... -
When is a 16k not a 16k ?Can anyone explain what this machine is supposed to be ? Speccy with a 16K sticker on the base. Doing a peek 23733 returns 255 so a 48K ? Opened …
... ?
Speccy with a 16K sticker on the base.
16K ? Bit confused unless the case ... -
Help with joystick interfaceHello to everyone! Just got me a joystick interface I have never seen before. I don't have instructions for it and I don't know if it required some…
... -power off switch!
The lower ones are for sound input ... figured out yet how the lower ones work but they seem ... if this is 48k or 16k compatible only...
Anyone ... -
Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…
... (levels, screens, music etc.) into memory banks 1, 3, 4, 6 ... 49152 and above, I need memory bank 0 to be switched ... /> I understand loading data into memory banks is easier because all ... -
JSW1 - Game Loader DifferencesThere were four releases (five if you count the PGC bugfix) although with a few exceptions the loaders are about the same. [B]Loader: Pre-Production…
... code is loaded at a lower memory point to allow the Speedlock ... saver to sit in upper memory.
This saved the ... whole lot from screen memory downwards. Unfortunately, the 'save' did ... -
I'm looking for a program that....thought it might be a good idea for a thread also I'm after something that does multiple search and replace, over multiple files..the text to search…
... that does multiple search and replace, over multiple files..the text ... text file (a list of memory locations in my case)
Issue 4S display improvementsHi all, I'd noticed that the display (via modded composite out) of the Issue 4S I repaired a while back (details [URL="http://www.worldofspectrum.or…
... sourced locally available components to replace the ZTX transistors, I thought ... the datasheets, these have a lower transition frequency (200MHz vs 500MHz ...Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…
... program to fill the video memory,
; Created as a FOR ... ,16384 ; Beginning of the graphic memory
LD DE,1024 ; Loop ... /> LD B,E ; Load the lower byte into B, for DJNZ ... (HL),62 ; Fill the video memory with this number
INC ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... 'm looking for a simple memory transfer routine that shifts 32 ...BC307C to replace ZTX213Can BC307C be used to replace ZTX213? I only found some vague confirmation.
Can BC307C be used to replace ZTX213? I only found some vague confirmation.Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... all of the 4116 memory which will die a ... present and all the 4116 memory was getting warm, so ... I desoldered the 4116 memory, and repowered the board and ... and the dead 4116 memory was just loading this ... Z80 (which has much lower output impedance for a logic ...Compact Flash Card In "Memory Mode" - (Help)Hello my fellow WoS'ers I have been developing a Z80 8bit interface with a compact flash card port based on Pera's ZXCF "memory mode" interface for …
... based on Pera's ZXCF "memory mode" interface for the +2AB ...Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... takes a silly amount of memory for tables. So I've ... top to sort higher and lower multiplicands costs 20 cycles, which ...How to load a +3 dos file from disk to memory in z80Hi all again, Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination? Thanks.
Hi all again,
Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination?
Thanks.Emulator support for East London Robotics SP80 memory expansion?Do any emulators support the [url=http://www.worldofspectrum.org/infoseekid.cgi?id=1000377]East London Robotics SP80 memory expansion[/url]? That add…
Do any emulators support the [url=http://www.worldofspectrum.org/infoseekid.cgi?id=1000377]East London Robotics SP80 memory expansion[/url]? That adds another 32KB of RAM which you can page in/out at address $8000.FS: 16K ZX81 with Composite Video16K boxed ZX81 with ZX8-CCB Composite Video [URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=371014090988&ssPageName=STRK:MESE:IT"]here[/UR…
16K boxed ZX81 with ZX8-CCB Composite Video [URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=371014090988&ssPageName=STRK:MESE:IT"]here[/URL]USB Memory stick testA friend of mine is selling some USB memory sticks that he claims are 500gb for ?35! I said that can't be right, so he's given me one to try. When I …
... mine is selling some USB memory sticks that he claims are ... . I thought you "lost" more memory than that with new drives ... (I'm also aware that memory is getting smaller these days ... Sony have developed a 2TB memory card!).
All these ...Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…
After all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory.
How do I go about implementing this in machine code?
Thanks in advance...Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... the event I have to replace it where is the best ... over the CPU (which if memory serves was a repair for ...Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... When the Z80 writes to memory, that write is exposed ... with writing to ULA-contended memory of an external system? ... imposing the real-time memory writes onto an actual ... top half of a 16K RAM that overlaps the ... into the uncontended upper memory so it can copy ...WOM Memory Signetics 25120 Series 9046NHello, here: [url]http://www.ti.com/ww/en/bobpease/assets/www-national-com_rap.pdf[/url] at pages 128 und 129 you can find information about a very …
... information about a very usefull memory that unfortunately is not (more ...Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... 've been investigating contended memory timings on the Timex Sinclair ... Timex SCLD still applies memory contention at these locations ... 4000 - $7FFF making a memory access at each location during ... in port F4 when applying memory contention; contention is applied ...Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…
... routine to read data from memory(peek..etc) rather than using ...48k memory dump to 128k???Having problems getting a 48k snapshot to load into 128k mode using ZX Spin. Tried saving 48k memory as a binary file and loading it back in 128k mo…
... .
Tried saving 48k memory as a binary file and ...LOADing 128k's worth of data???Just getting to grips with the concept of the 128's 'bank switching' set up, but how can you load the stuff into memory from tape (or TAP file)? Do…
... you load the stuff into memory from tape (or TAP file ... load the 16k blocks individually and place them in a memory bank ...
