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SPIN - debugger / fill memory / how ?I try to fill the screen with 00 value, but I don't get the expected result. - pause the game - debugger - hex numbers - fill memory block - fill wi…
I try to fill the screen with 00 value, but I don' ... numbers
- fill memory block
- fill with 00
- main memory
- start address ... /> - ok
then
- view memory
- all screen data is ... -
Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... stack messes with something else. Unfortunately I'm used to memory management ... worked. As I set up memory with all z88dk and sp1 default ... +sp1 project with optional future 128k music to maximize available memory and ... -
Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
... /04/zx-spectrum-scanline-flood-fill.html"]John Metcalf's Scanline ... /04/zx-spectrum-scanline-flood-fill.html
10 CLEAR ... /> 200 REM Coordinates to start fill
210 POKE 63694,x ... />
300 REM Location of fill pattern
310 IF RND ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... />
;PseudoRandom Memory Fill
;Store end of scan ...
RandomFill1
PUSH HL ; Get random values into ... With a leading space
LD E,TEXTCOLUMN
PUSH DE ... br /> QP_PADDING
PUSH DE ; Pad with spaces to make all ... -
Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... parts of programming...
With the object drawing, that can ... '0' and fill your your destination array with the number of ... number '0' and use a memory fill to build the sorted destination ... /> mov ebp,ecx
push edi
lea edi ... -
How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
You can decide how much memory you need for the stack ... the limit in memory (remembering that push descends through memory). Check this magic ... size your stack, fill the stack space with a constant value, ... at the extent of the memory allocated for dynamic data, ... -
P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…
... in a single frame to fill this area.
[/quote]< ... frame.
For simplicity - with LDI to contended destination you ... more than half of screen memory (3750 bytes). If you ... update area 32x20 without flickering. With push /pop you probably can copy ... -
Z80 processor question...Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to…
Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to hardware interrupts ? -
Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... , select Edit -> Fill Memory Block. Apart from the fact ... $55 in the [I]fill with:[/I] field, [I]start ... text" in the [I]fill with [/I]field: doesn't ... the first BASIC program with the second BASIC program. ... Similar behaviour can happen with TZX files too. I ... -
Utility to read/write to memory cards formatted for +3EThis post comes from [url=http://www.worldofspectrum.org/forums/showthread.php?t=25658]this thread[/url]. I've released a small command-line utility…
... +3E formatted memory cards without having to deal with low-level issues ... HDF file, or a memory card with no valuable files on it ... and file name on your memory card / disk image.
- Files ... added upon writting to the memory card /image disk.
- Can ... -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... The original Spectrum 128K memory map (with only one 16K bank ... 0x1FFD on the Pentagon switches memory banks as described in [ ... Second category of expansion of memory over 128k.
... Third category of expansion of memory over 128k.[/quote]
... -
Two 128 +2a bundles and boxed +3 with beltLast I'll be doing thanks to imminent baby arrival... [url]www.ebay.co.uk/itm/SINCLAIR-128K-2-ZX-SPECTRUM-bundle-great-condition-/280712862876?pt=U…
... /> Also have a boxed +3 with replacement drive belt I haven ... /> Box is tatty from memory. Comes with a couple of disks and ... cost price and have traded with a couple of people on ... -
Are OpenSE BASIC and SE Basic IV incompatible with Plus D?Hello, I'm considering Andrew Owen's impressive [url=http://sourceforge.net/projects/sebasic/]OpenSE BASIC[/url] and [url=http://cheveron.github.io/…
... from the floppy disk with a single RUN command ... no BASIC program in memory. But with these ROMs (latest ... ZX Spectrum SE model with latest ROM compiled) shows ... also the Interface 1 with microdrives, and they work ... the Plus D incompatible with OpenSE BASIC and SE ... -
Protek Joystick Interface with push buttonI have come across this Protek joystick interface - it does not appear to be their switchable version, but has a push button on the front: [url]http…
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... to see if I understand push and pop when it comes ... />
LD A,5
Push AF
Ld A,7 ...
Push AF
call addfunc
ADD A,B
Push af
ret
Issue with loading on a +2 (Grey)Hello together, I have a problem with my newly aquired (and first ZX Spectrum + 2 Grey). It isn't possible to load any game at all, because the…
... />
I have a problem with my newly aquired (and first ... .
- I did a memory test with the TAP File from here ... and even a soaking test with multiple tries is successful.
Any help with this case is appreciated.
Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... end of RAM (FF00 - FFFF), fill with FE, routine is at FEFE ... a few bytes to play with before end of table. JR ... IM1 routines
PUSH IY
EXX
PUSH HL ; preserve important ... RAM (there is some trick with using the ROM to JR ...T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
That PUSH/POP routine is how I ... effects that aren't possible with PUSH/POP, so if there is ... yet...
Regarding the memory limitations - this is the point ...16K games.Hi all, Cauldwell's stuff aside, are there any good 16K games that you'd recommend? Regards, Shaun.
... up with displaying the screen. To make matters worse the memory that ... is available is in contended memory (shared with the ULA). Also, if ... just how far you could push the '16K' envelope.
[/quote ...Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... into three different real-world memory failures with 4116 RAM.
with. (My memory tester's first test ... pseudo-random fill test - the entire memory bank is filled with a pseudo ...The Non Randomness of Sam BasicHows about this for weird. Hardly ever bothered with such simple stuff before but this is what I just did on the Sam ( as in a real one now I've got …
MrCheese: indeed - that's exactly what my diagnostics rom does for the random memory fill test - to check the memory still holds what it was set with, the PRNG is just re-run with the original seed and compared against the contents of memory.Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... a partial failure internally with the row/column selection ... get caught by a random memory fill test. One I've ... programs fine, but crash with games... we had a ... Speccy at school with exactly those symptoms. ( ... />
(The idiot with the ZX-81 RAM pack ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... to share access to it with the ula. The ula always ... pushing moves down in memory. So we push in the reverse sequence ... the move is not synchronized with the raster you might see ... 6144/14=438.9 times with different sp values
How to crash an emulator??Ok, new game. a quote from Digital Prawn from another topic "I have crashed virtually every emulator out there." The game: Make a routine that …
Fill a +3's memory entirely with 0xdd. Works on Fuse, and I believe RealSpectrum as well (but that's not really much more of a challenge than WinZ80...)I blew up my +3I'm still not sure of what happened (most probably a wrongly inserted interface) but I blew up my +3. What happens when I turn on the power or press …
... . Sometimes, a black screen with a blinking border. Most of ... black lines. Or it can fill with color blocks.
... QUOTE]
Basically, the memory section is totally controlled by ... array, so if its a memory problem (And the symptoms suggest ...Windows Vista?I'm having real trouble finding a decent spec. laptop that has Windows XP on it, it's all Vista Vista ****ing Vista. I've down (well, let's be honest…
... is one Z80A, 48K of memory (shared with video RAM), a 16K ... crash even if you do push the hardware (which in Windows ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... . As I set up memory with all z88dk and sp1 default ... variables) will be allocated memory with the program code and will ... />
push af
push bc
push de
push hl
push registers for you.
...LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... the stack pointer register and PUSH data onto the screen display ... : to use 16-bit transfer with PUSH.
[QUOTE=BloodBaz;453369 ... to note is that contended memory is not actually contended until ...Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... the output buffer. The last memory fill operation will overwrite those 3 ... restore code thus joining up with the last static section ... /> Here is the depack routine with comments:
[code ... authors and/or WOS members with knowledge on this subject ...DivIDE in emulators - the best choiceI tried briefly [B]FUSE [/B]and I don't understand how to get DivIDE working. What exactly do I need, and what exactly should I open. I want to simul…
... simulate the real hardware with loading standard programs ... do I create it and fill with TAP files?[/QUOTE]
memory card or hard disk. ... only used this method with ZX Spin, but ... Reformat the Compact Flash card with the following command
