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IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... in the 80's few of us independently spotted that there ... 's a block of more that 256 ff's ... it'll jump to the last byte or ram. You can put a ... in there and the first byte of rom will act as the ... . This saves having a 257 byte table in your own code ... -
Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... work, thanks! How much free RAM is left over? It would ... address used in RAM is $5BA0. Immediately following the last byte of code at ... -
Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... work, thanks! How much free RAM is left over? It would ... address used in RAM is $5BA0. Immediately following the last byte of code at ... tables. I was just thinking of things that annoyed me about ... keyboard controls were top of the list (of course you can use ... -
Test your emulator with one damn tricky TZX file!Some time ago I got hold of this tricky TZX file with a custom [i]super[/i] turbo-loader. [i]The load time is 18 seconds (!)[/i]. Until recently, I w…
... denotes the number of used bits in the last byte of the block, and ... starting at offset 0x08 [i]of ... simply specify how many bits of the last byte are used, (i. ... the OTLA project are freely available, and someone could perhaps ... -
Spectrum +2 grey ear mod?Is it possible to turn the sound port on the back of a grey Spectrum +2 into an ear input? I know it's possible for the black +2 but I can't find muc…
... internal RAM as a 16k byte area. But because the internal RAM chip ... has 8k ROM and 56k of RAM available for use. However, the BASIC ... in to increase the amount of RAM available to BASIC. But you have ... to have more than 64k of RAM.
[b][i]Mark ... -
Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... is
;ORd with the last byte of the
;tile just ... /> LD A,(DE) ;The leftmost byte of each
OR (HL) ; ... LD A,(DE) ;The leftmost byte of each background
OR (HL ...
LD (HL),A ;byte of the previous one.
INC ... -
unreleased spectrum protection system - any use any more? also pokerama sourceDon't know if anyone's interested in this. During my days hacking games for Your Sinclair and Crash (and Sinclair User for a while) I had a pet proje…
... system with a working title of XLR-8. The software ... because it used every byte of RAM. Lots of never-before-seen ideas ... all over every byte of RAM, Alkatrazz-style lump of loads of decrypters but running ... speed during the same block of edges etc.
Anyway ... -
128kB snapshot on ZX48kBWhat is best way for 128kB snapshot loading on 48kB models ? Some Z80 snapshots are 128kB versions (Z80 v2 or v3) but contain 48kB games. Same proble…
... and to last 16kB of ram load current ram page ? Or set ram page 0 ... load in last 16kB current ram page signed on value of port 7FFD ...
- stack pointer is in last 16kB of ram (49153-0000)
- snapshot ... -
New gameHello. I've just started developing a new game for the 128K spectrum. In fact, its the first thing I've ever programmed on a Spectrum (i'll admit, I…
... just been looking at some of the minigame entries with an ... opponents. You'll have plenty of RAM available for AI search routines :) -
unreleased spectrum protection system - any use any more? also pokerama sourceDon't know if anyone's interested in this. During my days hacking games for Your Sinclair and Crash (and Sinclair User for a while) I had a pet proje…
... SoftRom because it used every byte of RAM. [/quote]
I did ... running in an (emulated) Multiface RAM :) -
unreleased spectrum protection system - any use any more? also pokerama sourceDon't know if anyone's interested in this. During my days hacking games for Your Sinclair and Crash (and Sinclair User for a while) I had a pet proje…
... SoftRom because it used every byte of RAM. [/quote]
I did ... running in an (emulated) Multiface RAM :)
[/quote]
JON NORTHHi Jon, i just followed the last thread with some interest. I used to send you hacks years ago and got a few published in YS!! I can only say dont g…
... ;). What do you make of the renumbering system used by ... was concerned, each different generation of Speedlock had to be cracked ... sense to split my versions of Speedlock into further variants, ... it doesn't verify every byte of RAM or that would have failed ...Funniest Spectrum-related memorySeeing the emulated loading screen on the Dreamcast speccy emulator reminded me of something from many moons ago. I was in the local computer shop w…
... the address just after the last byte of the screen$, and hence the ... first byte you can write to that ...tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... /> ld a,(de) ; get first byte in pixel row
ldd ... (hl),a ; write first byte into last byte of pixel row
inc h ...tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... /> ld bc,8*31 ; number of LDDs in 8 scanlines
ld a,(de) ; get first byte in pixel row
ldd ... (hl),a ; write first byte into last byte of pixel row
jp pe ... we're at the bottom of a char so these bits ...2007, and still no NIC and browser for the Speccy?I've started to read all the w.o.s. threads, starting by the ones that came up with the search function, using the keywords of the topics that intere…
...
I think that most of people uses emulators and old ... , experimenting.
Title of thread maybe says more than ... simple, and requires lot of time and buying some components ... assembler is waste of effort. Every free byte of RAM is welcome :DCybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... 500, on successful collection of 550 I get 5500 bonus ... However after this, the last character of the running score gets corrupted ... it on succesful jewel collection of any amount.
[/QUOTE]< ... It must instead be the last byte of the string that holds the ...Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…
... Speccy has just under 41K of RAM available to BASIC.
This ... /> works but increasing the size of the array slightly causes the ... that you have run out of memory.Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... you'd need several tens of k of RAM available to hold the maximum ... stack size used (if more RAM is needed the fill tidies ... is included (with the exception of library subroutines called as listed ... filler before the current batch of z88dk library routines so a ...divIDE ProductionJust to let everyone know that we have made further progress with the updated divIDE. Board design has been completed and changes have been made to …
... on divIDE+ reduces the amount of RAM available to ResiDOS.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…
... Spectrum 48K with one extra byte of RAM! Setting PC to $0000 and ... now get an error of "List Index out of bounds (0)". I ...Random access, file sizes and more.A few days ago Aowen mentioned that random access to saved data is not a problem. Here are my thoughts, doubts and suggestions regarding this subject…
... of machine code routine or firmware update becomes available, something that's available ... environment that allows mixing of C and assembler in ... that would increase the amount of RAM available for C (or asm) ... routines I've spoken of are safely interruptible so ...Difference in emulator screen sizes and coloursSeeing as Greencard's gone out drinking... I've done a comparison between Spectaculator and ZXSpin. ZXSpin's full screen with border is taller than S…
... karingal's post, aspect ratio of an square pixelled 352x296 screen ... particular TState timing, and the last byte of bottom border finishes at a ... display area, and not all of it is displayed on a ... all of the display, regardless of the fact that not all of it ...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 …
... /> I've implemented about half of the suggestions so far, so ... does a more thorough variety of tests than the two ... automatically, detecting 16K or 48K of RAM available.
Watch out ... previous version.
Pseudo-random RAM filling test, with 16-bit ...ZX81 tape formatIs there a description of it somewhere? The TZX format doesn't give it but can it be worked out from what it says about block 19? There is a good d…
... bytes filename (bit7 set in last char)
LEN bytes data ... , the last byte of a (clean) file should be 80h (ie. the last byte of the ... and Bytes
Each byte consists of 8 bits (MSB first) ... by the next byte. A "0" bit consists of four high pulses ...The Joy of Upgrades.Well, this weekend I am working on upgrading my computer and its gunna be a beauty. 3Ghz Quad Core, 4GB Ram, 16000 DDR2 Ram, 1 TB HD. ATI Radeon GT4…
... Quad Core,
4GB Ram,
16000 DDR2 Ram,
1 TB ... .
I had loads of trouble getting the bits, now ... , you won't have 4Gb of RAM available to you. Deduct how much ... RAM your graphics card has against ...The Joy of Upgrades.Well, this weekend I am working on upgrading my computer and its gunna be a beauty. 3Ghz Quad Core, 4GB Ram, 16000 DDR2 Ram, 1 TB HD. ATI Radeon GT4…
... , you won't have 4Gb of RAM available to you. Deduct how much ... RAM your graphics card has against ... that will take noticable advantage of it.
[QUOTE=Little ... 'd lose a hell of a lot of stuff if the 1TB ...Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…
... . It might touch every byte of RAM, but I don't ... and will miss many classes of errors. (Without having ... the code in front of me - always a danger :-) ... fill testing. This kind of testing will detect all ... sorts of things that a simple ...How much ram has my ZX Spectrum?How can I see how much ram my ZX Spectrum has? C64 has this info in the title screen, the Spectrum not. Thanks! Micky
... given moment. The real amount of RAM available depends on the memory map ... is able to see 64K of RAM, programming its bank registers accordingly ...ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…
... file. TAP attaching functions are available to external programs.
... commands and external programs. Functions available on rst $08: open ... code.
* Possibility of getting absolute LBA sector and ... .command has 7.5K of RAM available and may call any ...
