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The Top 25 Modern PC GamesIn the thread [url]http://www.worldofspectrum.org/forums/showthread.php?t=40451[/url] , Ivanzx asks do you prefer modern or 'classic' era Spectrum g…
... sure you back up the data when CCleaner asks you if ... still problems, then test the memory. To do this, download MEMTEST86 ... . If MEMTEST86 does show any memory errors, then try swappng out ... /> [QUOTE=VanTammen;645871]Wasn't Read Dead Redemtion available on PC ... -
Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
... actual order of address and data bus wiring for all RAM ... /> [*]Don't mix address with data lines!
[*]For DRAM the ... matter which actual memory location is written to, or read from, as ... as the write and the read access the same location :-D ... -
Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…
Interesting
[CODE] 2 dec = 00000010 in binary
34 dec = 00100010 in binary
162 dec = 10100010 in binary
where the data bits are
MSD -> 76543210 -
Adding TAP loading to the +3e ROMHello my fellow WoSers I have decided that I want to make my project official so I can share its development with you all as well as get some help i…
... involves +3DOS to reserve some memory pages (initially, 1,3,4 ... and 6, if my memory serves well). 128K programs loaded ... will try to load code/data into +3DOS reserved pages, which ... game, it crashed. Then I read about the reserved pages used ... -
Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... program as opposed to graphics data etc
org 33000 ... over and over
;read keyboard
;set new ... or two bytes of data afterwards for the computer ... computer then expects 2 data bytes to give it a ... bytes are now at memory address 33000 by clicking ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... leisurely 280ns cycle, and a memory read is generally longer still (the ... of time with the memory signals set to read RAM) - and furthermore ... at the end of the memory read cycle, with fast enough RAM ... the Z80 actually samples its data bus. (I have some simple ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... logic and doing the actual read or write when the video ... to the unpredictability of Z80 memory accesses)[/QUOTE]
Thanks ... that the Z80 puts the memory address on the bus for ... long enough time for the data bus lines to settle down ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... vs. speed of video data. But one possible way ... you could steal the memory cycle during the Z80 ... refresh memory access (you would of ... resisters to isolate the data/address and control buses ... data in a latch/register because it would need to read ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... vs. speed of video data. But one possible way ... you could steal the memory cycle during the Z80 refresh ... memory access etc.[/QUOTE]
... Z80's irregular pattern of memory reads, there is no ... logic doing the actual read into a buffer. -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... can read video and CPU data, but you need latches and memory access ... /> I never heard of 'Transparent' memory access for Z80. -
Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... ? by Tim Jackson - a recommended read for Z80 fans.
memory, I think the Z280/Z380 ... features such as an instruction/data cache, pipelining, etc. Again, they ... -
+3 BASIC DOS_DemoI got side-tracked while working on the Op.Wolf conversion and ended up writing this +3 DOS utility which provides most of the disk functions that mi…
... the memory map option, which is called automatically prior to a READ ... 1: BASIC program code & data
REM 2: Machine & ... 3: Assembler program code & data
REM 4: DOS/RAM ... some time.
The memory map uses the function GO ... -
+3 BASIC DOS_DemoI got side-tracked while working on the Op.Wolf conversion and ended up writing this +3 DOS utility which provides most of the disk functions that mi…
... n/a
M=MEMORY CHECK b=line#, c= ... f$=string of length to read into f$,
or ... "=numeric_expression" length to read to address
S= ... /> f$=string of data to write from f$,< ... -
Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... 32 if memory serves - then build up from there - read the book ... Off Loading to Software configured Data Processing - truly awesome!
Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... controller, the interface will receive data which won't be able ... someone writes a routine to read that data.
Besides, the ... the Z80 as its sole memory address space), retrieves whatever values ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... touch the display file (pixel data) - this is always used ... mirroring the Spectrum's lower (read "video") RAM. Depending on the ... does this my listening to "memory writes" to the spectrum video ... can anyone help provide a data base on which hardware interfaces ...TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... external memory upgrade to ZX with 48kB then ZX can crash = data ... send different data values to same data bus and CPU can read incorrect ...Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... ). This is port decoder and memory controller.
List of ... /> - data of paging port 7FFD are rewrited also if CPU read of ... port 7FFD (write floating bus data)
- access ... cpu with same way as memory access)
Is ...TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... just had a look, and read quite a bit of your ... the Sinclair machines when neither memory or port I/O is ... first pixel read
[*] Whether attributes or pixel data is read first
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... the Sinclair machines when neither memory or port I/O is ... first pixel read
[*] Whether attributes or pixel data is read first
Adding TAP file contents to a Spectrum +3e DOS PartitionHello my fellow WoS'ers, This thread is a companion to a great little guide from a fellow AmiBayer [B]mnjnurney[/B] you can view his thread by [URL…
... data into main RAM and then move it to paged memory ... POKEs to load into paged memory. Those can probably fail ... to preserve any code/data that may have been ... as any file is opened+read+closed before running any ... the disk is only being read from and not written ...RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…
... . Off course the screen memory was an option but I ... hl, 24000 ;backup 200 bytes data
ld de, 49152 ... hl, 49152 ;restore 200 bytes data
ld de, 24000 ...
LD A, (29084) ;read level nr
LD (36772 ...Full disk systems for ZX Spectrum?Hello. Although I don't use much more than TR-DOS, but an acquaintance of mine, a user of Atari XL/XE, always says (which is annoying and irritatin…
... and feed the Spectrum with data.[/QUOTE]
The only ... the DivIDE. Its code is read from DivIDE flash ROM. From ... that reads and writes to memory with data read from or written to ...Adding TAP file contents to a Spectrum +3e DOS PartitionHello my fellow WoS'ers, This thread is a companion to a great little guide from a fellow AmiBayer [B]mnjnurney[/B] you can view his thread by [URL…
... be loaded into the extended memory. Elite works OK as it ... 's all in "normal" memory, whereas LodeRunner 128 isn't ... problem is that the level data is being loaded into the ... memory TAP2DSK needs to alter the loader to either use DOS_OPEN / READ ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... only handle 64K of memory. There are several methods ... paging.
Memory in the 128K models is ... Half those pages are contended memory, which means that the ... graphics, scripts, and level data, and your main code ... And you can only read the book in your ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... to exploit the extra memory is to use those ... RAM where the screen memory normally sits. The bottom ... gone and paged out your data library.
... pulled from, means that memory read/writes can take a ... screen being read out affects half of the memory banks. ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... />
But the most memory-efficient is to have the ... , write those bytes, switch, read, switch, write etc. until ... sprites at the top of memory, and only ever write ... at the bottom of memory. But then you can ... as the screen for sprite data, but it's pushing ...Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…
... sets of 65535 bits of data?[/QUOTE]
... error in 65535 bits of data, except comparing each bit... ... ,$FFFF ; CRC result
Read:
ld a,(de)
xor h ; XOR with memory content
ld h,a ...What games benifit from having a faster spectrum?I'm using Spectaulator atm and have been playing around with the mhz slider. Could real Spectrums be added to or altered to act this way? Could the…
... 're both trying to read from the lower memory at the same ... a CPU as most store data in temporary registers. This has ...+3e filebrowserHello everyone, Im writing a game/program loader for the +3e (with an IDE interface, but it can work with floppies too). The program lets you choose…
... do it would be to read the data (partition/filenames) directly from ... media; it will take less memory, but I guess the overall ...
