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The Complete Machine Code Tutor - bug?Dear all, I'm having a fiddle with The Complete Machine Tutor and have come to the bit where they're adding registers together. The image on the l…
... shows the start of the routine with [nearly] all registers showing ... location HL.
Advancing the routine by a single step (and ... -
Using a Mayflash MD USB Adapter with Spectaculator on Windows 10Using a Mayflash MD USB Adapter with Spectaculator on Windows 10 First, plug the Mayflash MD USB Adapter into a USB port and let Windows do it's t…
... . use the default error handing routine - bash head against nearest wall ... -
"ZX80 Brain" RPN CalculatorIt is at times like [url=https://www.worldofspectrum.org/forums/discussion/54176/depression]when threads such as this are posted[/url] that I get the…
... already written a screen-drawing routine for a "ZX81 Brain" version ... -
48K light gun on a 128K ZX SpectrumHello I have a 128K ZX Spectrum. I want to use a Cheetah Defender with a DE-9 plug (Kempston interface wired) with it. I am aware that normally it…
... version which plugs into its RS232 socket.
So far ... -
Jet Set Willy 2's original author releases a modded version of the game!Apologies if this has already been posted, but Derrick P. Rowson, the original author of Jet Set Willy 2, has been modding JSW2, and the latest versi…
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Sprite routine changed to permit the ... />
Sprite routine changed to permit in ... /> The moving floor routine has been extensively changed ... br /> Changed room compression routine. It was the change ... -
In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…
... in-game via an interrupt routine. I'm thinking about whether ... beeper via an out(254) routine (taking care not to hog ... -
Jump AlgorithmAfternoon all, trying my hand at a liitle basic coding ( it's a quiet work day :) ) and wondered if anyone has coded a platformer type jumping routin…
... coded a platformer type jumping routine in basic.
I ... -
Spectrum Use for ZX81 Pseudo Hi-ResHi Folks, I've been looking around at some of the "Hi-Res" stuff which was achieved on the ZX81 and I came across the faq https://www.landley.net/…
... contained an extremely hairy interrupt routine that replaced the ZX81's ... usual display update routine. Basically, it pointed the i ... -
Samurai Warrior - The Battles of Usagi Yojimbo. BUGFIX.While playing around I managed to put the game in a bugged state. When the game is in this state any enemy that's facing right while executing an att…
... some strange code during the routine that checks if an enemy ... -
z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…
... the middle of making a routine and you can't remember ... -
SpecBAS 0.900 ReleasedAgainst my better judgement, here's 0.900. It's got lots and lots new, but mostly the new shiny is the editor. You can indent your code, you can e…
... curve algorithm for the CURVE routine - demo "ultraviolet" looks a lot ... -
New language for spectrumI made a halfway language between assembly and Basic here is some example code: [code] INFLOOPSTART ifram(scrolla=1) print(intera) endif…
... code creates an interrupt service routine which runs at about 50FPS ... -
New ZEsarUX 5.0Hi! ZEsarUX 5.0 is out! :) You can download it from the URL: https://sourceforge.net/projects/zesarux/ Finally I have succeded emulating Si…
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Fixed text to speech routine when sending non-ascii character ... -
ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
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//
// store routine
if(mlen.rr> ... ;;
;; offset+length copy routine
ld c,a ; 4t ... &de to use same routine
call _ulzfa050 ; ... ;;
;; move on one routine, follow char layout of screen ... -
im looking for a scroll routine continued...seeing as the forum is now back up. i though we could continue the conversation on facebook on here.
seeing as the forum is now back up. i though we could continue the conversation on facebook on here. -
z88dk : Support FunctionsJust a quick one here, I am looking to doing some dirty dirty code with C and load a screen$ file from the disk using "system( command )" - yes I …
... location to the ROM load routine?
Thinking about it ... -
How to automatically find the character set in a gameThis is all completely new to me, so please be patient. I've done some reading up on how character sets are handled by the Spectrum. I understand tha…
... use their own character printing routine (putchar?) instead of using the ... -
I live and learnThanks to Einar's ZXDB link I found under the Books folder and English sub directory a PDF file named 'The Century Computer Programming Course for Z…
Thanks to Einar's ZXDB link I found under the Books folder and English sub directory a PDF file named 'The Century Computer Programming Course for ZX81 and Spectrum Basic'. I must have half a dozen Basic lesson books but it always helps to add more since ... -
Simple way to add AY music to AGD games!I have written some scripts and asm to autobuild interrupt driven AY music into any AGD game. The play routine and music is stored in bank4, so y…
... game.
The play routine and music is stored in ... -
how does this multiplication routine work?taken from chuntey wordpress: imul ld e,d ; HL = H * D ld a,h ; make accumulator first multiplier. ld …
taken from chuntey wordpress:
imul ld e,d ; HL = H * D
ld a,h ; make accumulator first multiplier.
ld hl,0 ; zeroise total.
ld d,h ; zeroise high ... -
How to improve my program using oversized numbersI'd like my dice program to print out the number four times bigger than normal if possible. Anyone know how to do this? Or I could write a sub rou…
... I could write a sub routine that uses block graphics to ... -
I think maybe I'll try my hand at making a game like Boggle next.Or maybe a sliding puzzle sort of thing? Although its a royal pain working out all those symbolic characters, its kind of rewarding when it works af…
... and use a cursor move routine to position the tile - if ... -
Key repeat weirdness with EI & IYI finally (after 35 years!) decided to write something a) for 48k speccy b) in z80 assembler. It's been over 20 years since I've written anything in …
... that I created was a routine that draws 16x16 sprites to ... must be the slowest sprite routine ever but it works.
routine that when called populates a ... by using the key/joy routine and this is where the ... -
Flood Fill IssueHi Folks, Came across the following Flood Fill routine by John Metcalf: [code]; scanline fill by John Metcalf ; call with d=x-coord, e=y-coo…
1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
... and faster.
The routine needs to 'backup' the line ...Control De Sprites - simple exampleHi, I have been looking for a routine to use Sprites in basic. I found Control Dr Sprites, which looks really powerful, but the instructions are in S…
... have been looking for a routine to use Sprites in basic ...Need help with keyboard scanning ?After getting frustrated with learning ASM for a while I'm back into it. The little listing below is using the ROM's PRINT AT routine to draw me a sp…
... the ROM's PRINT AT routine to draw me a sprite ...Isometric enginesWhilst taking a breather from Chess development I've been playing around with a little isometric 'room' building idea. Just wondering what sort of…
... the block with a specific routine isn't much bigger in ...
