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InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... :
* If a LD A,I or LD A,R (which copy ... tstates: read high byte and jump to interrupt routine.
In IM ... />
If you have a short interrupt routine, it is possible that ... NMI, and secondly a bug in the ROM's NMI routine. It was ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... rising edge of the clock in the last T state of ... interrupt.
* M2: 3 tstates: read low byte of 'nnnn' from ... ]
Again, this is in agreement with the Mostek Z80 ... />
If you have a short interrupt routine, it is possible that ... -
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... calculate screen addresses, these are read from the table, is this ... still room for a little optimisation though:
In each row ... character is a waste. Replacing PChar with a routine to print a Char row ... out to be more of a pain in the long run.
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... Start
; **** START INTERRUPT ROUTINE ***
MainLoop:
; ... br /> ld a,0FEh
LD I,A ; I=FE
IM ... Store the X char accross in a, eg.A=20
LD L ...Idea about improving EmulatorHi, I got a bright idea today how to improve such excellent emulators a bit more. Okay, disassemblers are available in nearly every one new released …
... : in many situations I wanted to know who (what execution routine) is ... modifying a particular address (for example ... /READ or n/WRITE hardware line matches.
In my case a ...New release of EmuZWinEmuZWin Version 2.6 Release 1.0 Beta? ? (30-Jan-2005): A lot of changes. Most important are: [+] Formats supported: RZX, SLT. [+] Sound devices sup…
... in the Debugger : it is possible to set breakpoints on memory read ... /write, on port in/out, and to assign another actions for a ... call routine in the Spectrum memory, not only just stop. A special Breakpoint ...New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... the keyboard
----------------------
The best way to read the keyboard is ... reading the keyboard ports which will ... can be read in port 31: IN 31 which give you a number which ...Game being created with Platform Game DesignerBeen playing with this since yesterday when i bought it from Cronosoft. To someone like me who cant program its excellent to create a Manic Miner st…
... I remember correctly there's a ROM routine at address 654 (028Eh ... code a little (my first) routine in assembly to call that ROM routine, read the ... E register and store it in the correct ...Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... 's some more info (in spanish) in the news:
< ... , so when you read from 0-16383 you ... in #FE form a mask applied to ULA port #FE, so if you write a ... 0 in ... produce border stripes when doing a BEEP.
Wanted: Game Ideas!Ok then here goes nothing. I'm a reasonably good programmer, but I'm really no good at coming up with game ideas and graphics. So if any of you have…
... personally i will be interested in writting gfx engine. not ... sprite routines but print routine for 40 char per ... to do things (i read few emails about Double ... /> we/you should write a game design paper (and ... than the one i read about in last DD email ? ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... functions to read the keyboard, every joystick and mouse in the ... sp1_MoveSprPix()" function (move a sprite to a pixel position), the linker ... br />
A function declared like this in file A:
in a library.
In the compile ...How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... .
When an IN A,(N) is executed, you need ... to start checking. The IN A,(N) is probably the ... a new routine. Finally, to be safe, you need to allow the IN A ... may have come across a particularly funky keyboard reading routine.
...Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... ) results in a constant stream of bullets.
I need a routine that ... -BS
in a,(254) ;read keys
bit 0,a ;test space
routine
ld a,1 ;if it was ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... /spectrum.h contain all the keyboard, joystick and mouse functions. ... the functions have been changed in some way from splib2, ... is able to read AY tunes from a variety of standard ... compression. Pucrunch was successfully used in Phantomas Infinity.
MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... it 5.
I bet in 5 working Speccy that nothing ... since the ROM is altered in some places to make screenupdate ... screen is set and the keyboard read), as is BLAZE (ACE ... it ever since I was a kid in the 80's.
in the 90's.
< ...MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... since the ROM is altered in some places to make ... it is emulation when by a piece of software software ... run. Therefore is SAM81 a real ZX81 emulator for the ... screen is set and the keyboard read), as is BLAZE (ACE ... to show that on a ZX Spectrum ZX81 will ...Sinclair Basic Vs PascalWith the rise of the structured programming movement (Jackson et al) was it wise to put the Basic programming language into the Spectrum. By this ti…
... an IBM Thinkpad T20, I read on the forums ( [URL ... during POST, your Thinkpad in 95% of cases is ... the same fatal error in rare cases when you ... this (IBM recommend buying a new motherboard), which is ... up without a keyboard attached and you get a "keyboard not found, ...The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... a real speccy would. The tape status is sampled whenever an IN $FE ... at the memory surrounding an IN, and try to determine which ... . This system is also used in EightyOne, as marko passed the ... needs to refine the edge routine a little. I'll see if ...The BASIC ISRFirst of all, excuse me if my blatant ignorance about this topic makes me write some nonsense :) The thing is that I'm finishing a game in mixed BAS…
... a huge amount of memory considering where the vector table and routine ... set the values to $fe, then put the routine at $fefe. Less ... with either a HALT or DI before the first (setup) routine too ... see, tho', is having the routine in the top page, especially if ...The BASIC ISRFirst of all, excuse me if my blatant ignorance about this topic makes me write some nonsense :) The thing is that I'm finishing a game in mixed BAS…
... with either a HALT or DI before the first (setup) routine too ... see, tho', is having the routine in the top page, especially if ... />
and set I to #fe
all buscombinations are ...cup of tea on a laptopmy desk buddy has just spilt a mug of tea over her lap top. it wasnt switched on, i unplugged it, removed the battery and cd drive. what do you thin…
... />
Call comes in....
My keyboard is doing funny things ... there)
Have you ever read what it says?.
yes ... br /> Its ages since I read it.
OK, to paraphrase ... they had dunked the keyboard in coffee and in a rescue attempt they had ...From a book about commodore.."In April 1982, Sinclair released an improved computer called the ZX Spectrum. Compared to the C64, the Spectrum had few technical advantages. It ha…
... advantages. It had a poor calculator style keyboard, beeper sound and ... in Great Britain" bit. I've just heard it in documentaries, and read ... it in WWW sites or ... to be classed as a home computer in those days, and ...From a book about commodore.."In April 1982, Sinclair released an improved computer called the ZX Spectrum. Compared to the C64, the Spectrum had few technical advantages. It ha…
... technical advantages. It had a poor calculator style keyboard, beeper sound and ... Price was a very important factor in choosing a computer in those days.< ... the ZX Spectrum got a look in. Although the BBC was ... truly cannot believe everything you read in books.Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... the block length, including the a header bytes. Since the area ... is stored in the "spare" 8K following a MODE 3/4 ... address) and it will read CUSCRNP in order to temporarily switch the ... screen using that rom routine, then load in the next set of ...ZXSP Emulator running too fastHi All, I was wondering if any of you have had a problem whereby the zxsp emulator runs too fast so won't load games etc? For example, when loading…
Without meaning to start a 'this is better ... have a functional virtual keyboard as ZXSP does, and a virtual ... Fuse has disk support, can read TZX images, memory browser, ... br /> So like I said in my original post, I prefer ... just that ZXSP has a couple of things on ...Cybernoid 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..…
... the character set detailed in the manual.
... in the CHARS system variable. Then 8 bytes are read ... out and poked to the screen memory by the PRINT routine ... . Just like a UDG!
... Nah, I'm interested in a BASIC solution. Any old ...Cybernoid 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..…
... for the table a spot in the current one ... thinks the key is a Cyan/Green ovally jewel ... />
Regarding the bomb. A simple room check would sort ... snap available but without that routine in it? Ta.
keyboard.[/quote]
...Cybernoid 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..…
... m thinking that when a bullet moves 2 pixels ... be picked up in order for a bonus.
... #E2, #E3, #E4 in sequence. The routine is placed directly after ... before they're poked in from a table.
poketiles: ... code book i've read! (other than magazines ...Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... have carefully read through your approach of jumping to a routine in the printer ... fine and appears bug free in principle.
I think ... described MicroSource might be using in my previous post.
