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zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…
... /> because according to them the Contended bank is IC's 6 ... ?
so are the memory just striped within a particular ... -
WTF stupid machine10 LET X = 28672 or 61440 depending on how much memory you have 20 LET A$ = ?? 30 IF A$ = ?? THEN INPUT A$ 40 LET Y = CODE A$ ? 48:IF Y>9 THEN LET Y …
... . I'd suggest reserving more memory, as he just starts poking ... almost the end of the memory map.
So, I ... about 25K of non-contended (that is, fast) memory.
Also ... ;32767 THEN PRINT "No more memory!": STOP
For 48K ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... />
; *MUST EXECUTE IN NON-CONTENDED RAM*
ld hl ... (hl),d ; Write BYTE to memory
inc hl
jr ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... />
; *MUST EXECUTE IN NON-CONTENDED RAM*
ld hl ... (hl),d ; Write BYTE to memory
inc hl
jr ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... />
; *MUST EXECUTE IN NON-CONTENDED RAM*
; *CORRUPTS REGISTER 7 ... (hl),a ; Write BYTE to memory
inc hl
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... allow access to the 128K memory banks. The Spectrum link occupies ... 256 BYTES of the Z80 memory map. It is impossible for ... will upload the entire Z80 memory map:
zx232 /u ... ]
; *MUST EXECUTE IN NON-CONTENDED RAM*
; *CORRUPTS REGISTER 7 ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... 512 BYTES of the Z80 memory map (65024 to 65535) ... final Z80 code so no memory was modified, thus PUSH ... of the full Z80 memory map from 0 to ... 65023. 80 BYTES of memory are left to finish the ... br /> ; *MUST EXECUTE IN NON-CONTENDED RAM*
; *CORRUPTS REGISTER ...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…
... caches using a 256 BIT memory fetch. The entire instruction ... includes inctructions that read/write memory. Again, the data must ... overhead of the Windows memory paging system virtualizing the ... - disable those interrupts, avoid contended RAM and the full power ...ZXDS 0.9.1 beta 1Hi! After way too much time, new [URL="http://zxds.raxoft.cz/"]ZXDS[/URL] version is available. Doesn't add much stunning features (although the dis…
... someone can tell me which memory card I need to run ... presume once I have the memory card and download any accompanying ... just a case of sticking ZXDS onto the micro sd and ...New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... the first three 16K memory banks are contended.
memory
pop hl
... --------------------------------------------------------------------------
; 12 BYTE memory remap table.
What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... reprogrammable chip and can correct memory layout to +2A mode ... 2A/+3)
- new memory layout for slow and fast ... operations are accelerated/fast/not contended (fast IN/OUT instructions)< ... not contended). Snow effect in videoram is fixed (disable slow memory in ...Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…
... /> Specifically, screen RAM - which is contended and with a compatible design ... pretty much directly proportional to memory bandwidth. Part of the ARM ... and waste as little available memory bandwidth as possible, nearly all ... is very wasteful of memory bandwidth.Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... 128/+2(grey) exist contended and uncontended ports.
... half of all ports will contended (slow down by ULA). ... =1, ports is slow (contended)
If A15=1 ... A14=1 and fast memory page is set, ports ... and slow memory page is set, ports is slow (contended)
...Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …
... popular.
Regarding the memory issue, I'm glad you ... and optimised for a small memory footprint.
I have ... mastered the art of using memory efficiently in the C environment ... and therefore sprite data in contended RAM too. In high RAM ...Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …
... library") and my concerns about memory usage have pushed me back ... some data into lower conteded memory in the Sid Spanners game ... infinite lives poke is in contended RAM, how embarrassing :D )
I'm learning to save memory though. For instance the level ...DSpec FINAL Released ?Hi, I've been away for some time, and I did search the forums prior to post this, but I couldn't find anything about it, not a single post ! Just an…
... 'm more then happy with ZXDS to be honest, it does ... and I have very fond memory of it and a tremendous ...Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... 48K Spectrum a 128K Spectrum memory model? If you are, then ... with a 64K memory bank (all of it is contended), and the ... 32K RAM with another 64K memory bank ...Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... 48K Spectrum a 128K Spectrum memory model? If you are, then ... with a 64K memory bank (all of it is contended), and the ... 32K RAM with another 64K memory bank ... is the rest of the memory, so i'm trying to ...Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... the +2A, with different banks contended looks like a pain in ... work out if the extended memory mode is any use either ... , but only the other two contended ones. Great.Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... the +2A, with different banks contended looks like a pain in ... work out if the extended memory mode is any use either ... , but only the other two contended ones. Great.[/QUOTE]
ZXDS 0.9.1 beta 1Hi! After way too much time, new [URL="http://zxds.raxoft.cz/"]ZXDS[/URL] version is available. Doesn't add much stunning features (although the dis…
... a couple of questions on ZXDS if I may:
... br /> [*]Having read the ZXDS web site I believe the ... bigger screen.
[*] Yes, ZXDS was the first ( and probably ... up ) and the extra memory ) so if Patrik feels ... of the DSi, maybe ZXDS will be able to run ...ZXDS 0.9.1 beta 1Hi! After way too much time, new [URL="http://zxds.raxoft.cz/"]ZXDS[/URL] version is available. Doesn't add much stunning features (although the dis…
... doubled up ) and the extra memory ) so if Patrik feels to ... card of the DSi, maybe ZXDS will be able to run ...ZXDS 0.9.1 beta 1Hi! After way too much time, new [URL="http://zxds.raxoft.cz/"]ZXDS[/URL] version is available. Doesn't add much stunning features (although the dis…
... is, in order to run ZXDS on the DS you need ... cameras, double processor power, more memory and the ability to run ... the extra processing power and memory of the DSi.ZXDS 0.9.1 beta 1Hi! After way too much time, new [URL="http://zxds.raxoft.cz/"]ZXDS[/URL] version is available. Doesn't add much stunning features (although the dis…
... is, in order to run ZXDS on the DS you need ... cameras, double processor power, more memory and the ability to run ... the extra processing power and memory of the DSi.[/QUOTE]
memory than the DS then? Are ...Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …
... sequence for both fragments spanning contended cycles to illustrate that. Try ... had slightly fewer memory op tstates colliding with contended cycles. Try starting ...Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... , the CPU is accessing the memory, otherwise, Its the ULA. Trivial ... more memory, the ULA also provides an A7 for the contended 64K ...Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... simplified memory contention scheme - afaik all memory was contended, anytime (so every memory access ... (and even 16K) of video memory (even split into several bitplanes ...Nintendo DS Spectrum EmulationIn my usual style of being around five or six years behind popular console culture, I've just bought my first Nintendo DS. Obviously I want to do so…
... reliable) plus 8gb memory, containing fully set up zxds plus shed loads ...50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... and then PUSHed into screen memory in sequence, according to which ... screen memory takes longer, so things slow down. Thanks to the contended ... way the screen memory works, the PUSH ...
