-
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... bit with memory contention and floating bus stuff in ZXDS and there is ... display them in time?). However, as far as the floating bus is ... I have checked in this regard:
C.S.S. 48k ... .html"]tech doc[/URL] about floating bus.
Ramsoft's [URL ... -
Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…
... stack instruction to maximize performance in copy/shift/mirror routines. ... /> questions are:
1) is floating bus present on all of 128 ... /> ld bc, $04ff ;initial C=$ff, repeat four times to ... />
in a, ($ff)
and c
ld c, a
ANN: Write Spectrum Games in C with speclib121 Announcing the sprite pack C library for the z88dk C cross compiler available from: [url="http://justme895.tripod.com/main.htm"]http://justme895.tr…
... write games for the spectrum in C! The process is simple: ... flood fill in action. The second is ten windows floating around). ... The third is a C version of ... fourth is an experiment in registering a C interrupt service routine. ...Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…
... discovered in the past, Spectrum +2A (and probably +3) do have floating bus ... ports, only on some ports in these situations:
When ... that +2A does not have floating bus port, but it's incorrect ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... and exact info about the floating bus behavior and timing. An explanation ...I want to see if a file exists. in CIs this what they call a lockfile? I'm trying to write some software that translates from one language to another (as some of you probably know, I …
... does computations on the sentence in file A, and writes the ... the verb, looking up words in a wordlist, stuff like that ... /> Anyway, how can I check in C if a file exists or ...Where any games programmed in C?Were any Spectrum games written in C on a secondary computer that could compile Z80 code?
Were any Spectrum games written in C on a secondary computer that could compile Z80 code?Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
Before I start hacking Fuse's source...
Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus3_hardware.html#inFFport"]floating bus modification[/URL]?
-Stephen****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... , that put all the stuff in the screen every frame. With ... sprites flicker free at 50fps in 48K and all 128K models ... implementation for each machine (floating bus in 48K, shadow screen in 128K) so the ... want (exactly D_Skywalk) create a C model to convert it to ...Developing in CI am beginning a small project for the ZX Spectrum. I intend to write the thing in C, doing the entire development on PC and then transferring someho…
... intend to write the thing in C, doing the entire development on ... operations equivalent to assembly language IN and OUT?Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem that it would be better for "Z80 beginners" to write in C…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem that it would be better for "Z80 beginners" to write in C…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem that it would be better for "Z80 beginners" to write in C…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem that it would be better for "Z80 beginners" to write in C…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem (to me) that it would be better for "Z80 beginners" to wr…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem (to me) that it would be better for "Z80 beginners" to wr…
... "Z80 beginners" to write in C then have a look at ... out they compiled from C then were tweaking the ... that someone ok at writing C would always "outperform" ... aware that hisoft C was around in the speccy heydey ... but was C used much in writing games back ...How to write a simple game in C+asm.This is just a link to an old post in Development, about a post of making a simple game in C for the Spectrum. It was suggested that this thread shou…
... of making a simple game in C for the Spectrum. It was ... that this thread should belong in this C forum as well. (thanks ... /how-to-write-a-simple-c-asm-horizontal-scrolling-game-tutorial ... , which explains a bit more in BASIC what the game is ...Speccy + issues?There was a topic somewhere regarding the different issues of the Spectrum keyboard and how it had some subtle effects on programs. Just wondering …
... be the absence of a floating bus in the +2a doing that - at ...Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... the routine probing the 'floating bus' is checking for the ... removing the 'floating bus' IN instructions, as described in the previous post ... why the 'floating bus' method is employed in the first ... so presumably the 'floating bus' synchronisation code was removed ...Kempston detectionI could use some help. This Kempston joystick behaviour drives me mad. I've written a game called Necrospermia recently ([url]http://www.worldofspec…
... one way - select kempston joystick in menu.
Exist more ... used (here is bits from floating bus). IN 31 after halt can return ... :
EI
HALT
IN A,(#1F) ;read kempston joystick ...Which to buy? +2/+2a/+3?Sorry - I did a quick bit of lunchtime googling, it sounds like the grey +2 is the best machine, as it has the board without the reduced chipset. I …
If you want hardware for testing your software then the floating bus issue is irrelevant. The solution is don't abuse the floating bus in your code.MultiCart for TC2068I've got one Portuguese Timex Computer 2068, but built-in AY sound chip and joystick interface are not widely used on this machine. Also compatibilit…
@colonel32: There is no floating bus in +2A/B & +3 also, ... is no floating bus either and the paging in/out in done in a different ... to page the shadow screen in.MultiCart for TC2068I've got one Portuguese Timex Computer 2068, but built-in AY sound chip and joystick interface are not widely used on this machine. Also compatibilit…
... a floating bus in +2A/B & +3, but it works In a slightly ... worked on shadow screen or floating bus yet.How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... earlier though (and he used floating bus in Cobra to start drawing before ... but there is a thread in this forum about how it ...IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... . As you know, IN A,(C) is actually IN A,(BC), with B ... Z80 can only read FFh (floating bus).
Convinced myself about ... /> ld hl,0
SigueTest in a,(c)
dec hl
Including data at compile time in C?Does anyone know how to write a C program (preferably using DJGPP) in which a large block of data is incorporated directly into the executable at com…
... to write a C program (preferably using DJGPP) in which a large ...*.cab files in c:/_restore/archiveOne question: is it possible to delete *.cab files from c:/_restore/archive folder (WindowsMe)? Some of them contain viruses and my antivirus program…
... to delete *.cab files from c:/_restore/archive folder (WindowsMe)?
in *.cab file.
Arrays in C and C++ from a Java Programmer.I have been looking arround the web and found many conflicting answers to this question so I thaught I'd ask you folkes. What is the C and C++ equal…
... />
What is the C and C++ equalvalent of Java's array ... the number of elements stored in an array.
Help needed - UK lottery number generator in c++I'm trying to write a c++ program to generate 9 lines of 6 numbers for the uk national lottery. Anybody got any idea where I'm going wrong? I'm com…
... 'm trying to write a c++ program to generate 9 lines ... /> I'm compiling this program in dev c++, but it doesn't ... /> // to contain numbers 1-49 in positions 1-49
for ...
