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KLIK: Z80 snapshot to screenshot converterWith most Spectrum emulators, you can save current game screen in original ".SCR" format. This will give you a 100% perfect copy of the Spectrum scre…
... an alternate N+ engine struct and got it detecting Tumult, but ... detect IM2. I suppose you could read the vector table and check ... usually prefer to stay in IM2 and patch the main_engine jump with ... -
KLIK: Z80 snapshot to screenshot converterWith most Spectrum emulators, you can save current game screen in original ".SCR" format. This will give you a 100% perfect copy of the Spectrum scre…
... an alternate N+ engine struct and got it detecting Tumult, but ... detect IM2. I suppose you could read the vector table and check ... usually prefer to stay in IM2 and patch the main_engine jump with ... -
Witchcraft: Nirvana, Bifröst and such[url="http://www.rgcd.co.uk/2011/10/buzzsaw-zx-spectrum.html"]"When considering this next to nearly every other ZX Spectrum game though, Buzzsaw is l…
... 'I' of the interrupt address, and that points to a table ... I,A. Then you set IM2 and enable interrupts EI. Now when ... 65024 plus some unpredictable offset, and two bytes are read. Because ... the Speccy's BASIC interpreter and keyboard support still running, then ... -
Witchcraft: Nirvana, Bifröst and such[url="http://www.rgcd.co.uk/2011/10/buzzsaw-zx-spectrum.html"]"When considering this next to nearly every other ZX Spectrum game though, Buzzsaw is l…
... =190, table at 48640..48896, and then pointing to either 191 ... the gaps, or actually try and fit your whole interrupt routine ... . Then you just use EI and HALT whenever you need your code ... up with the interrupt and your sprites and colour effects are all ... -
Robots RumbleA very enjoyable game... [img]https://2.bp.blogspot.com/-URgYNfcz940/W6VwNEVGVLI/AAAAAAAAOtQ/bRnSK5dSqIwJord6qn0x7kezOOrUTUcHQCLcBGAs/s320/rr.png[…
... machines crash.. something related with im2 and the lack of some configuration ... -
Robots RumbleA very enjoyable game... [img]https://2.bp.blogspot.com/-URgYNfcz940/W6VwNEVGVLI/AAAAAAAAOtQ/bRnSK5dSqIwJord6qn0x7kezOOrUTUcHQCLcBGAs/s320/rr.png[…
... machines crash.. something related with im2 and the lack of some configuration ... -
IM2 on a 128k SpectrumHello: I have found another article on IM2 found in Personal Computer News, Issue 90. In the article "Face up to the Time", I typed up the code (…
... this an inherent problem using IM2 and 128k machines with BASIC? I ... little longer it will click and I’ll get that aha ... -
IM2 on a 128k SpectrumHello: I have found another article on IM2 found in Personal Computer News, Issue 90. In the article "Face up to the Time", I typed up the code (…
... an inherent problem using IM2 and 128k machines with BASIC? ... site instead going to cut and paste sections of it: ... the page number somewhere. And you cannot expect any ... you should write an IM2 for the Spectrum. Ask ... thing to remember about IM2 is that it can ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... . The EX AF,AF' and POP AF instructions, which technically ... transistor net from Visual 6502 and managed to test all ... sequences, excluding conditional and DD/FD-prefixed ones and halt (still a work ... that check specifically this behaviour and that still seem to ... -
SP and IM2 woesI have a function that writes the backbuffer to the screen using the method by which SP is stored, I "POP" a load of registers and then chnge SP to t…
... chnge SP to the screen and "PUSH" them back.
... put interrupt driven sound and music in the game ... soon as I Enable the IM2 interrupt, the screen gets ... byte swap function I disable and re-enable the interupt, ... , the function is large and takes a few cycles to ... -
IM2 calls to player routine on 128k?Hi all, Apologies for being crap, and not even in a funky, skillo kind of way but it's been over 20 years since I last wrote anything in machine cod…
...
Apologies for being crap, and not even in a funky ... machine code for the spectrum, and indeed Z80.
and Sam Coup?, so I ... calling the play routine before halt keeps munging my registers ... I'd use an IM2 ISR to make noise while ... -
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…
...
#endasm
printf("Setting im2\n");
im2_Init(0xd300); // place ... will start the manager up and enable interrupts
// ...
; ROM routine, read keys and update clock.
pop ix ... -
Top Telly Tip... Halt and Catch FireThe series is set in the early 1980s and depicts a fictionalized insider's view of the personal computer revolution. The show's title refers to the f…
... set in the early 1980s and depicts a fictionalized insider's ... the fictitious machine code instruction Halt and Catch Fire, which would cause ... -
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 …
... />
I got IM2 up and working with a simple EI ... ,RET interrupt function, so that HALT ... jr z,nosprdraw
halt ;Wait for interrupt
call ... made of sprite data, graphcis and "template", background data which ... -
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] ; ***********…
... br /> JR Z,horizontal
AND 240
JR NZ,up ... left checking if not
AND 240 ; if moving left, ... />
; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts
ORG 0FDFDH ... -
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 …
... interrupt (HALT) so that it is in perfect VSYNC and then draws ... =FE
IM 2 ; SELECT IM2
EI
RET ... />
; 0FD00 - 0FDFCH RESERVERD FOR IM2 INTERRUPTS
ORG 0FDFDH ... -
Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... /> LD (YOFFSET),A
; halt
LD A,1 ... =FE
IM 2 ; SELECT IM2
EI
... ,(DE) ; Get Mask
AND (HL) ; And With HL
LD (HL ... -
R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... Russian FAQ covering the Pentagon and Scorpion somewhere...).
I ... one point I reset it, and at several points later on ... I read and use the value. The time ... without the contended RAM the HALT would take place earlier, essentially ... -
Oh the humanity, my beautiful den of thieves, and local pub, closed it's doors.My local pub. MY PUB. My wonderful, awful, piss soaked, blood stained den of eniquity..... the only place in town, where when I walk through the doo…
... , the hardcore drinkers, alcoholics, and generall dross from my urban ... a Friday night, the protaganists halt proceedings, to apologise profusely to ... leave my dog there and my shopping, and my pint, whilst ... the Fleur De Leys, and the George and Dragon on the way ... -
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…
many scr files to tap fileguys, I know that threads like this have existed in the past, but i'm gonna try to get a video onto speccy. The +3e to be exact. figured i'd use full…
... ) open 15 files at once and load a screen to screen ... 1 then to screen 2 and switch screen so the other ... . maybe throw a im2 halt in between each one and try to get ...IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... currently at 6000+games and demos and i've been converting ... single load demos and megademos and moved onto the IM2 loading demos. ... These use IM2 to play music and ... disks work great on Spectaculator and Spin, I tried today ...BEEPER music compo 10-11 July on Di:Halt partyoh yeah! public pressure organizers [B]Di:Halt [/B]which will take place [B]July 10-11[/B], agreed to hold the [B]beeper music compo[/B]. The rules…
... ! public pressure organizers [B]Di:Halt [/B]which will take place ... the address playback.
And do not forget to specify ... the name of the track and music editor.
Address ...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…
... actually pretty complex, and shows many things like ...
****************************************/
// C and SP1 code libraries are added ...
// malloc and free talken from the sample ... with some arbitrary patterns, and draw it.
...Between interrupts and handlersSee there's this short period of time immediately after an interrupt comes but [i]before[/i] the control is transferred to an interrupt handler, abou…
... states are these, and does it change somehow between IM1/IM2 modes?The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... , that decode only IORQ and A5, not having into ... a (decent) joystick interface and would be interested in one ... the entire 48K space, and some of them could ... 4 of kilobyte for the IM2 table, but if space ... you sacrifice that table and assume that the low byte ...Using RST 16 and udg flickerHi there! I'm using UDGs and RST 16 to make a simple canyon bomber game. I've got the game mechanics working ( finally ) but now I'd like to make …
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I'm using UDGs and RST 16 to make a ... />
I have used a halt instruction before my draw operation ...Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... from memory and NOP is executed in its stead. (See 'HALT Exit ... between an interrupt during a HALT and any other interrupt.
< ... contains the following code for HALT:
[CODE] case ... the opcode fetch after a HALT could actually trigger paging ...Halt and Catch FireAnyone watching this tv show? a bit like MadMen, but set on the early 80's (83 I think), and spent in the PC industry. bit of the underdog tale a…
... 80's (83 I think), and spent in the PC industry ...
