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Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... more than 30 sprites on-screen. There are never more ... about 12 sprites on-screen at once in R-Type and ... the data on to the screen at a reasonable speed. ... count about 16 sprites on-screen at once, and the ... amazing amount of sprites on screen. But that's only ... -
Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... about 12 sprites on-screen at once in R-Type[/QUOTE]
screen that's not 3 sprites ... -
Embedding external code in Z88DK projects (Beepola related)Hi all, I've been doing a few things in Z88DK, but I was wondering how I could link binary data compiled separately into my projects. Specifically I…
... export your Beepola song as .asm. Then you can just ... put that asm output between #asm / #endasm. Remove the ... ORG and put a label before START in ... beepola asm, something like _BEEPSONG. Then ... -
Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... , items dropping down the screen from the previous set of ... balls ricocheting around the screen. There's in game music, and ... moving much faster than anything in Bubble Bobble
...
Cybernoid contains 70 screens in one 48k load, similar amounts ... -
Message to all programmersHello folks, more and more programmers in the recent time are using special loading routines for their Homebrew-Software. This makes their game runn…
... are not faster or flashing in another way. I understand if ... ?t need the loading routine in MC. And if there is just ... -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... all your screen writing routines in bank 2. Page the screen you want ... to write to in at 0xc000. Store the data in ... drawn, page out the screen and page in bank 0 to do ... for game data (after the screen in bank 5). You could use ... -
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... the BASIC and MC programs to run faster.
In BASIC, the ... instruction is pretty slow.
In MC, you could take advantage of ... ' Think you forgot this instruciton in your code
DJNZ Loop ... -
Home Brew stuff...I'd quite like to have a go at writing a game for the speccy. Will probably start with maybe re-trying stuff that has already been done, just to pra…
... /> I drew the title screen by hand in JSWED for Maria on ... .
I'm waiting in anticipation of the new Tommygun ... -
Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... questions I raised.
In a standard long division, the ... the decimals of the dividend. In MC however it is easier to ... binary digit can maximal result in 1, which makes that dividing ... remark "AN OVERFLOW...." is missing in ALL examples I could find ... -
Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... do step along the 'decimals' in a base-2 way, by ... 97 for 65534/3, where in 'true decimal' it would have ... for Spectrum that handles dividing in MC anyway? -
Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... do step along the 'decimals' in a base-2 way, by ... 97 for 65534/3, where in 'true decimal' it would have ... for Spectrum that handles dividing in MC anyway?[/QUOTE]
in fact I tried to code the staartdeling in MC. -
Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …
... is that I have bugs in the software, and I don ... /> The software is all in z80 asm, and we were assembling it ... with z80asm in the z88dk suite ... might start again rewriting it in C as I really don ... -
SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…
... not.
POS returns the position in a string of a substring ... -
SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…
[QUOTE=Dunny;471349]
POS returns the position in a string of a substring - POS("e","hello") returns 2.
D.[/QUOTE]
Does that work with POS("mint","polomint") ?
Can it match a string instead of a char? -
Converting 50ths of a second to hours, minutes and seconds...Hi Folks, I have written some code to convert the interal Spectrum clock from 50ths of a second to hours, minutes and seconds. The following code s…
... /> I made a timing routine in MC where during intrupt the timer ... -
Magic DiceThe author of this game is GCC, not GGC. [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0002980[/url]
... appears on the loading screen and not in-game (where it says ... GCC), so the loading screen creator ... -
Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …
... /> The software is all in z80 asm, and we were assembling ... it with z80asm in the z88dk ... start again rewriting it in C as I really ... that it won't run in contended memory (e.g. ... flash utility will be running in). I learned this a ... -
IF and control flow in machine codeHi everyone, Basic has a nice control flow like if statements. How can these be done in machine code since i cant find anything thanks
In MC you use flags and jumps ... conditions
example in BASIC and in MC
10 LET ... -
Mr Kizza being rather cheeky ....again !Someone from Atari Age contacted me and pointed me at this... [url]http://www.atariage.com/forums/topic/163375-back-to-basics/page__pid__2095588#ent…
... have a sun in pretty much the same position in the sky and ... -
logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... move variables from BASIC to MC, like this
PRINT ... $,C$,
and then in MC at start
rst ... .
Another example used in the ZX-PC ROM:
128kefrom the scratchpad for the 128ke "Finally, reading from a non-existing port (eg 0xff) will give the screen/attribute bytes as it does on the 48K/12…
... Wulf won't work (screen goes black) on a ... nope. the reason the screen goes black in things like jetpac which ... the code accidentally pages in the second screen. You need to ... go to a black screen as soon as you ... the game from the menu screen)
EDIT: ...New oneliners for 2008[INDENT][INDENT][INDENT]Here's my attempt at a first-person-perspective 3d game in one line of BASIC. It's called 'wormhole', and you've got to get t…
Actually I just noticed we could save another position in [B]Complica PvP[/B] replacing this:
[CODE]
POKE (g256)*n,12:
[/CODE]
with this:
[CODE]
POKE (g=0 OR g>256)*n,12:
[/CODE]logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... br />
and then in MC at start
... separated by comma). Pointer returned in HL.
... to newly memory returned in DE.
pop ... ;Store address of block in workspace
ldir ; ...Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…
... dimensional array of size 1x1 (in this case [I]"an ... array of size 1 (in this case [I]"a ... may seem the same, in practice the ROM needs a ... calculation to figure out the position in memory of this element. ... seem the same, but in the latter case the BASIC ...Steel Eagle: Martin Severn?Looks like Steel Eagle's loading screen has been done by Martin Severn. See that hidden signature in bottom right? This can be MAS, and I'm sure it'…
Agreed and added.
I'm also quite sure that the author that is listed as "SI" on the opening screen (and "SIM" in the high score table) is in fact Simon Hobbs, so I fixed that as well.Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... simplest solution that comes in mind first is to ... removed from the list. In these cases there are ... list, remember it's position, and use it when ... next bullet - if this position is empty (now highly ... after adding, keeping the position in cycle (when it out ...Mikie Bug?I'm playing this game for the speccy tour and have found a really annoying, and obvious, bug? When playing the locker room and canteen stages, it se…
... ' round can leave you trapped in the stage.
[/QUOTE]
screen.
Same is in canteen, you obviously ...games you couldnt completeHi, I was wondering what games you couldn't complete and why?. One of the games I was never able to complete was Knight Lore,not enough days,it too…
... =Hern;491255]Granted this was in the mid 80's but ... that instead of a Congrats screen or end sequence, you were ... just had a congrats screen,this was in my opinion a big ...Horace you smooth mover!Just wondered, was Horace the first character to move smoothly around the screen - rather than in a blocky, character space by character space fashio…
... move smoothly around the screen - rather than in a blocky, character space ... at the early Horace games. In all of them he moves ... around in exact character squares. Only Horace ... In The Mystic Woods has him ...
