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What does SPIN have?I have been asking this question since somebody answered another I had made that RealSpectrum was a brilliant emulator. It is in fact. But... I see e…
If there's ONE thing that......frustrated you about the spectrum when you were a kid (not now) what would it have been? 1) The attribute colour problem 2) The sound 3) The size…
Where do you start!I am fairly new to spectrums, and have only been programming for a couple of years starting on bbc basic. where do you start programming a game. Is a…
... of how the Z80 works, instruction side-effects, undocumented opcodes and ...I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... memory address of the next instruction, right?).
[quote]You ...I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... memory address of the next instruction, right?).
[/quote]
instruction opcode takes to execute, in ... the microcode breakdown of an instruction, the internal stages it goes ...What *Should* Have Been the Last Game to Be PublishedHi All, Inspired by the the thread about the last public/official/etc. Spectrum game, in your opinion, what would have been the ultimate (no hint in…
... the Spectrum. Why call a halt, and put a full stop ...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
... /> [quote]
How is this instruction broken down ?
LD ... seem to have missed this instruction.
[/quote]
Which ...Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…
... .
Plus the ret instruction at the end. Of course ... l instructions, only the last instruction was dec hl.
Type-Ins Project - appeal #256This is primarily for all those who have just tuned into the Speccy scene (to the veterans- it's just another appeal for type-ins ok? ;) ): As you m…
... make more sense to have instruction go the dedicated Instructions archive ...Type-Ins Project - appeal #256This is primarily for all those who have just tuned into the Speccy scene (to the veterans- it's just another appeal for type-ins ok? ;) ): As you m…
... make more sense to have instruction go the dedicated Instructions archive ...Index register subtractionHi, Just wondering if there a way to perform SBC HL,BC on the IX or IY registers. I can't find an op code for it, and my assembler doesn't recognise…
Sadly, it can't be done in a single instruction as SBC HL, BC is an ED prefixed instruction and the IX/IY opcodes don't work with any ED instructions.
You'll need to swap some registers I'm afraid!
Markomaking games on a real speccy-------------------------------------------------------------------------------- i have recently bought a speccy on ebay and i want to try to make s…
... , it's a very simple instruction set to learn - it's ...Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…
... is only valid once an instruction has completely finished, and some ... using it for the current instruction.
Unlike the Z80 ...Can Anyone explain sprites in Jet Pac/Atic Atac etcJet Pac was 16k, and yet the sprites were impressively fast. I notice they had a slight flicker at times, but were notmally pretty flicker free. W…
Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
... this way, though; just doing HALT would have the same effect ...Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
... this way, though; just doing HALT would have the same effect ...Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
I replaced the loop with a HALT and there seems to be no difference!!!!Doom 3 - hell's bells!Two days back I picked up a copy of Doom 3 and even before I'd started the game I had this strange creepy feeling... Two nights of playing later... …
... easy if you follow the instruction. Only at one point I ...pics next to titleshi, just an opinion , nothing more, i think would be very helpful to a have small screenshot of every game next to its tilles in the A,B,c...Z lists…
... to save instructions with the instruction project master I doubt if ...pics next to titleshi, just an opinion , nothing more, i think would be very helpful to a have small screenshot of every game next to its tilles in the A,B,c...Z lists…
... to save instructions with the instruction project master I doubt if ...Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
... cleared that space, by using HALT, and then waiting for (128 ...Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
... ...
1. I start with HALT command to begin my routine ...Announce: EmuZWin 2.5 Release 2.2 Post-FinalEmuZWin Version 2.5 Release 2.2 post-FINAL (16-Oct-2004): [-] A small pause added between TAP blocks while loading tape from .TAP image (otherwise s…
... ? (30-Oct-2004):
[-] DAA instruction fixed.
[-] Manual resize could ...
