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My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... is enabled. 256 mode defaults. Priority is given to high bits ... set to 16000.
Each byte is 8 pixels.
Evideo ... set to 16000.
Each byte is 8 pixels. Each bit ... -
ANN: Spectaculator 5.1Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…
... DSKs. It's pretty low priority tbh, as the original release ... certainly not the bizarre which-byte-do-I-randomise-in-this ... only ever randomises the final byte in sectors and it works ... -
Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... is done by loading the byte addressed by the stack pointer ... (SP) into the low-order byte of the PC. Increment SP ... . Load the high-order PC byte with the new SP addressed ... nesting interrupts and linking different priority peripherals.
"
I ... -
New SpeccyDo you think someone should go about creating a new spectrum computer? I'm talking about a spectrum compatible (not an emulator) with the capabiliti…
... single byte and then close to double it again using some sort ... -
help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
... in which I use byte-mirroring, my priority is not speed but ... Jet Set Willy), mirroring a byte is a very occasional operation ... a game which involves much byte-mirroring during play, there may ... -
help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
... in which I use byte-mirroring, my priority is not speed but ... -
i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... entering the instructions byte by byte - you must be some sort of genius ... -
i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... entering the instructions byte by byte - you must be some sort of genius ... -
i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... entering the instructions byte by byte - you must be some sort of genius ... -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... cover the entire display. Each byte stores relevant background information like ... sprites. The implementation of background priority over sprites is the natural ... -
whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…
... /2048 = 9.77 cycles per byte?[/quote]
About 8 ... [/I] unrolled (two commands per byte) and there's no other ... 1.253MHz z80 for the byte copy task, or the spec ... about 2.5 for this sort of operation so i wasn ... -
How to program Machine Code on a PC, and then run it on a speccy?Well, I've been looking into MC a bit more deeply recently - I reckon I could get my head round MC now. Back when I was a teenager, I couldn't see th…
... quite good too)
Sevenup ... is really great (but little ... gfx directly to asm via .BYTE directive
RealSpectrum or ... -
How to program Machine Code on a PC, and then run it on a speccy?Well, I've been looking into MC a bit more deeply recently - I reckon I could get my head round MC now. Back when I was a teenager, I couldn't see th…
... ]It looks like the parity byte is wrong as it generates ... present in SevenuP's page is broken, because the parity byte is ... -
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. …
... LDI as it takes 16t/byte
ld (...),sp ... 2byte of code for every byte moved but u need ... only 13 t for a byte
[/quote]
... worthwhile to consider a 30 byte wide x 96 vertical ... display to full screen. This sort of thing (with blank odd ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... memory write for the MSB byte.
The interrupt sequence ... an indicator for the highest priority peripheral to place its vector ... -
Fast division in machine codeHi Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code. Derek [ This Message was edited by: dmsmith on 2004-0…
... 3072, and speed is top priority, then maybe a lookup table ... need to read a 2-byte value
RES 0,L ... div3table starts on an even byte...
LD D,(HL) ; result ... -
TZX and the ZX81Evenin All. EightyOne is now is a state where I can support a more descriptive tape format. I know how some people have been calling for tzx suppor…
...
Possibly with another byte in there for the used ... bits in the last byte (I don't think anything ... doesn't put out any sort of header whereas the ZX81 ... -
8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... only possible to step a byte (two pixels in 16 colour ... 160x200 stuff m'self, i sort of feel that the high ... -
Programming Sound EffectsHi guys, Have decided, probably due in some way to my midlife crisis, to tart up and re-release (or even just re-lease) the old 48K Speccy games I w…
... the AY chip for this sort of thing because the PWM ... you use 90 bits=10 byte+2bit for 6.5?
Idea for a new feature to compliment a debugger in an emulatorI had an idea for an emulator feature yesterday. Don't recall having seen this idea before, but I'm sure you'll correct me if it has. :) In that cas…
... , you could call up some sort of graphical representation of memory ... the program is executing some sort of graphical routine or something ... a counter instead of a byte, to keep track of menory ...There's a bug in my Speccy, Dear Liza, Dear Liza...Hi guys, Just me being annoying again - Can anyone out there in 'Internetland' help me with ideas about what could be causing a bug in my Speccy em…
... I rewrote the basic, one byte type instruction side - you know ... , LD B, n, RET, that sort of thing. By this time ... I was blythly just sort of typing in anything that ...ORG? Mm?What is ZXSpin compaining about when I haven't defined an ORG? I understand it's some sort of address where the code will be stored. If this is the …
... /> I understand it's some sort of address where the code ... ] the address where (the first byte of) your code will be ...Problems gettingI have been experimenting with the audio-out options most Spectrum emulators feature, in the hopes to get some of my games running again from the ROM…
... a whole load of zero byte chunks at the end of ... the game springs to life. Sort of similar-ish. Maybe.
z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... there are many things to sort out and to design - mainly ... function that would return one byte at a time uncompressed. Might ...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…
... heads up on it? What sort of decryption you used?
byte. The loader then only has ...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…
... in at the end?", that sort of mentality. You guys go ... it doesn't verify every byte of RAM or that would ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... time. The ULA obviously takes priority, so the display doesn't ... before it leaves the current byte.
You have to ...ANN: Alchemist Software FTP site up and runningHi guys and gals Just a quick post to announce that the my new FTP site (address in my sig) is up and running. To log in, just log in as annonymous…
... , and as soon as I sort out the rest (I have ... more.
My main priority is to get every single ...Machine Code: quicksort optimisationI came across this z80 quicksort implementation when going through the wikipedia article on the same. It's 44 bytes long. I was wondering if any of …
... be faster; an insertion sort would be much better.
sort is probably pretty small, ... which case an insertion sort may make more sense ... , since I like this sort of posting, I'll add ... name for heap is a priority queue). The heap extract ...
