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Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…
... according to machine) tstates after interrupt?
If you're ... to the end before an interrupt occurs.
Alternatively, read ... -
Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…
... first synchronises perfectly with the interrupt, then waits 14112 ( = 14336 - 224 ... tstates which have elapsed since interrupt.
[ This Message was ... -
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…
... and only a one channel beeper (like the old PC speaker ... -
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…
... (multi channel sound on the BEEPer, mulitple colours in once character ... -
Why relativly bad colour on Spec compared to other 8bit?Why relatively bad colour on Spec compared to other 8-bit machines like the Master system or even c64? I understand the 8x8 block that you could hav…
The PC-Engine had several other processers working PURELY just to output graphics and sound. The Spectrum had it's Z80 CPU, the ULA and a Beeper. THis is where the differences lie. -
Zecut0r and ZAFA while ago (about 2 yrs)i took VbSpec and tried to port it to Delphi 6. Althought it was pretty weak, it. Meanwhile DelphiSpec 0.1 appeared and i wa…
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procedure zxbeeper ;"beeper test"
asm ;"asm code ...
call 949 ;"call ZX Beeper ROM ROUTINE"
asmend ;"end ... -
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…
It's waiting for bit 7 of R to be set. Bit 7 can only be changed in software using LD R,A. Look in the interrupt service routine.
The delay must be measured in multiples of 20ms. -
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…
... the game runs within the interrupt.
[ This Message was ... -
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…
... .5 bit DAC through the beeper, what the effective frequency response ... of the Spectrum beeper is and lots of other ... -
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…
... play the sample through the beeper or the AY chip. ...
No fancy on the beeper means 1-bit samples which ... bit) or through the beeper (sounds 4-5 bit, ... noise generator (through the beeper) or using the standard ... be played through the beeper. That might be a ... -
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…
... bits) as compared to the BEEPer's 2 static positions (1 ... the PWM technique with the BEEPer monopolizes cpu time (you've ... -
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…
... normal switch speed of the Beeper?
[/quote]
No ... -
Speccy Maps: Just what the hell is going on here then?Some time ago, a chap going by the name of Pavero built a few maps of Speccy games. Though they weren't brilliant, but they sufficed. He decided th…
... music (well the speech is beeper sounds, but is only on ... -
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…
... will wait until the next interrupt. As the screen drawing starts ... with this interrupt that is one way of ... -
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…
... begin my routine with new interrupt
2. Then i wait ... -
The best sound/sound effects on a Spectrum gameHi, wot do you think was the best sound and or sound effects on a Speccy game. I ask cos I think good sound effects sometimes definetly added to some…
Steve Crow's games had the best beeper sound effects for me.
Going in a wardrobe lift in Wizard's Lair sounds great in that same way as going through a security door in Starquake does (like Paul says).
Cheers,
Jon. -
The best sound/sound effects on a Spectrum gameHi, wot do you think was the best sound and or sound effects on a Speccy game. I ask cos I think good sound effects sometimes definetly added to some…
... display coming from your speccy beeper.
Another one that ... -
The best sound/sound effects on a Spectrum gameHi, wot do you think was the best sound and or sound effects on a Speccy game. I ask cos I think good sound effects sometimes definetly added to some…
... cheating, as Ghostbusters used the BEEPer and Starglider used the AY ... -
Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…
... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ... may be related to the interrupt-retriggering.
Unfortunately, for ... -
Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…
... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ... -
Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…
... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ... 3 part 6 (which has interrupt retriggering on every frame) to ... -
Favourite thing about the SpectrumWhat was/ or is your favourite thing/s about the Spectrum? Is it the soundchip of your favoured/owned machine, be it 48K beeper, or 128 AY the shee…
... ;
The speccy beeper sounds like no other beeper.
Some ... -
What is difference between "128" and "128+"?What is the difference between a "Spectrum 128" and a "Spectrum 128+" ?? And I am not talking about the different looking +2's, etc. Tnx! blakes…
... the sound comes from a beeper inside of the computer, and ... -
Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …
... as I say above the interrupt signal is not generated internally ... , and have better hardware based interrupt architechture).
[ This Message ... -
Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …
... and 50/60Hz vertical blanking interrupt.
The Spectrum's ... -
Recommend a 48k music program for me, or teach me how to search for them in infoseek. ThxThe only 48k music tracker I happen to know is Wham! Which ones do you like? Can anybody point me to some old threads on the subject? Thanks, E
... can squeeze out of the beeper using clever programming tricks - there ... -
Games that won't work with the +2a/bIs there a list of all the games that don't work with the +2a/b? Like Fairlight for example. Ta :)
... depends massively on timing and interrupt tricks.
If it ... -
OT: XP Service Pack 2 slightly annoying thingIs anybody else bugged by a little yellow shield with ! on it in the notification area of the task bar? Its to do with automatic updates and it alwa…
... - Appreciating the AY and the BEEPer since 1982! [url="http://www ... -
MemoryI am writing a game for the Spectrum and need to store a lot of map data. What is the lowest address I can start to store the data at ?
... - and that goes for the interrupt routine too, so if you ...
