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z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... // place z80 in im2 mode with interrupt vector table located at 0xd300 ... 0xd4, 257); // initialize 257-byte im2 vector table with all 0xd4 bytes ... ; set high byte.
im2 ; select interrupt mode 2.
A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how easy it actually is. (Actually I've already published this one some time ago, but this time the source is ...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
Set your RAMTOP as to allow enough room for IM2 vector table, AY data, AY player, IM2 routine. Set IM2 mode. IM2 rountine should RST 38 and call AY player then RET preserving the value of HL'.Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... for IM2 vector table, AY data, AY player, IM2 routine. Set IM2 mode. IM2 rountine ...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... ORG SETUP ; code fits before IM2 vector routine
DI ... BC,257
LD A,VECTOR ; IM2 vector
LDIR
... HIGHBYTE * 256 then get IM2 vector as VECTOR *256 + VECTOR
; eg ...
ORG VECTOR * 256 + VECTOR
JR ROUTINE ; place ...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
[quote]
The IM2 setup would be something like:< ... /> ORG SETUP ; code fits before IM2 vector routine
DI
LD A,VECTOR ; IM2 vector
LDIR
LD I ... ,HIGHBYTE
IM2
[/quote]
Most engrosing Adventure GameThis is one for all you text adventure lovers. Of which I am one. I remember reading those Fighting Fantasy books when I was a kid. The ones where y…
But what I'm saying is that it is!
There's absolutely no reason why you can't have an IM2 vector in that 4k and have it page in an AY playing routine + data without any problem.AMX MouseDoes anybody knows how the AMX-mouse works? Is it like a mouse for the Atari ST/Amiga? And if so which IN-port uses the software Which programs can …
... is generated on one
IM2 vector when an X movement of ... is generated
on another vector when a Y movement
Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... so at 50hz on a IM2 vector).
Beeper overhead is ...Finishing my Ragnar game...Hi all, Way back then, in my youth, I worked on a game for the Speccy called "Ragnar", which was a 3d isometric style mcoded game written from scrat…
... drop. Hence you design your IM2 vector so that it will only ... loop?[/quote]
AY = IM2. No one does it any ...Game loop design?Having some thoughts on how to design the game loop and could do with some hints and tips from folks who have done it before! It's all about how to …
... execute comfortably in the IM2 sync. The display will ... prepare first screen
enter IM2 routine
new screen ... return from function -
exit IM2 - after where we called function ... to HALT instruction
reenter IM2 vector
etc...
128k sound effectsCan anyone supply a short routine for producing 128k sound effects. All I am looking for is a laser sound and an explosion. Thanks Derek
... is simplicty itself. Use an IM2 vector to update the sounds. Use ... and don't use an IM2 routine to update the AY ...How can I see how long it took for IM2 to runHow can i see how many cycles it took for my interrupt routine to run, is there some way with Spectaculator debugger etc to see how long it has taken…
Assuming the debugger has breakpoints and T-States set a breakpoint at the start and end of the IM2 vector - the difference in T-States will give you the number of cycles it took to complete.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…
... previously empty ROM as an IM2 vector still worked and I imagine ...FrameSyncIt was many many years ago since i programmed assembly on the spectrum but I just picked it up again for fun. Now this is one thing I can't remember…
... is the address of your IM2 vector table, ADDR is the address ...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…
... also suggests locations for the im2 vector table and a generic isr ...ZX128/+2 unrainer (HAL10H8)[url]http://velesoft.speccy.cz/zx/umbrella/umbrella.htm[/url]
... modify to #39 value and IM2 vector table(last 2 bytes) is ...ZX128/+2 unrainer (HAL10H8)[url]http://velesoft.speccy.cz/zx/umbrella/umbrella.htm[/url]
... modify to #39 value and IM2 vector table(last 2 bytes) is ...Playing 128k music with z88dk ?Hi, I'm amazed how easy seems to make things with z88dk to build spectrum asm programs. After my first approach I miss some way to play 128k music, s…
... {
// initialize im2 mode
#asm
im2 mode with interrupt vector table located at ... 257); // initialize 257-byte im2 vector table with all 0xd4 bytes ... particular placement of the IM2 table and small JP ...Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…
... need a 257 byte interrupt vector table. Everything is not gold ... all 257 bytes of the im2 vector table. The interrupt service routine ... 0 and 2. Note that vector 254 would conflict with the ... ULA's 255 vector. SP takes care of initializing ...Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…
... AMX MOUSE interface use more vector values, but this interface ... resistors 150 Ohm) for better IM2 vector stability !
[img] ... .jpg[/img]
IM2 fixed vector table adress (correct floating ... Will work software with incomplete vector table.
[url]http ...New game: Nanako Descends to HellJust a bit over two weeks after their first game, The Mojon Twins strikes again with a new game for Spectrum 128k and Amstrad CPC: [url]http://www.m…
... the details of the im2 implementation in splib2. ... place z80 in im2 mode with interrupt vector table located at ... 257); // initialize 257-byte im2 vector table with all 0xf1 bytes ... 257); // initialize 257-byte im2 vector table with all 0xf1 bytes ...+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
... . All this games use incorrect IM2 vector = register I is set to ...+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
This is complette archive with sorted ZX software using incorrect IM2 vector table in ZX rom
[url]http://velesoft.speccy.cz/other/games-+2a-error.zip[/url]
All this games crash on +2A machines. More info in TXT file.+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
... stable ZX computers will for IM2 interrupt used only 2b value ... is ZX computer have unstable IM2 vector (different value than #FF ... crash. Batman use incorrect(uncomplette) IM2 table. For fix this problem ... "K-MOUSE 2008" interface (contain IM2 vector stabilizer)SIF interfaceNew hardware was developed for spectrum. It is dual full UART with HW flowcontrol. In addition module could be populated with ConnectOne module for W…
... /> - Interface is able to generate IM2 vector $FF when buffer in UART ... work in IM2 mode but only using a fixed $ff vector, which ... suggests to me that there is no IM2 logic ... generation and complete handling of IM2 mode? Having a ctc on ...Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
That im2 code is a little bit ... two-byte entry in the im2 vector table. ie -- he expects the ... create a full 257-byte vector table which I haven't ...
; entry to the im2 interrupt routine
; save registers ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... appropriately). The location of the IM2 vector table (for music, eg ... placing the 257-byte im2 vector table at address $d000 ... place z80 in im2 mode with interrupt vector table located at ... 257); // initialize 257-byte im2 vector table with all 0xd1 bytes ...
