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Small config tweak possible?Is it possible to tweak the phpBB configuration such that edits made to posts within five minutes of first posting time are not shown as edits? We'v…
Is it possible to tweak the phpBB configuration such that ... -
DEC BC/LD A,B/OR C/JP NZ,loopyesterday i saw nice trick:[code] dec bc ld a, b or c jp nz, loop can be replaced (bc starts >255, short jump) by: dec bc inc b djnz loop [/code] …
yesterday i saw nice trick:[code]
dec bc
ld a, b
or c
jp nz, loop
can be replaced (bc starts >255, short jump) by:
dec bc
inc b
djnz loop
[/code]
..nice -
Happy Birthday JP!Happy Birthday JP! (Though taking the time difference into account it may no longer be your birthday) Happy hacking all the same :smile:
Happy Birthday JP!
(Though taking the time difference into account it may no longer be your birthday)
Happy hacking all the same :smile: -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... to memory address nn.
JP (HL) ,I assumed would ... using a list of CP...JP nn
or ... br /> LD HL,jumptable
JP (HL) ; read/peek the contents ... what instructions do.
JP nn means PC=nn
JP (HL) means PC=nn
JP (IX) means ... -
BASIC performance tips?Been fiddling around with an old project a little after rescuing it from tape, and I'm toying with the idea of completing it (hey, better late than n…
... jump to. However, this particular tweak is completely useless with a ... replaced with a hyper-efficient JP/CALL.
I'd ... -
Speccy 128 QuestionMainly for the experienced speccy resurecters around these parts. Have you ever had a Speccy 128 with a borked TEA2000 video chip? The reason I ask…
[QUOTE=jp;262970]Ah, thanks for that - ... next step would be to tweak the frequency of the RF ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... flag (4T)
.read_edge_test:
jp m,.read_edge_loop ; loop if no ... check and self-modifying conditional JP are overhead that the previous ... than before.
Another tweak that I've made is ... -
THE HOBBIT loading screenHello again, thought I'd have a go at an alternative loading screen for The Hobbit. [IMG]https://dl.dropboxusercontent.com/u/61658082/THE%20HOBBIT%…
... have to tweak it a bit!
[QUOTE=jp;759654]Outstanding ... sig[/QUOTE]
Cheers jp!
[QUOTE=Einar Saukas ... -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... all ret instructions to a JP END command, and make the ... register.
After that tweak, it seems to work beautifully. -
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…
... fonts at http://www.pentacom.jp/pentacom/bitfontmaker2/gallery/, along with ... as I usually like to tweak them slightly as I go ... -
Sound emulation...I recently souped an 486 I had with some memory, a Soundblaster 16 and CD-ROM drive. It would have been a monster just a few years ago [img]/__forums…
... someone knows how I can tweak my config. Any help would ... -
LINE-routine and other nice pieces of codeThe line-topic came in the end with a nice piece of fast coding. I think that there might be more of these routines out there (where-ever-u-r). Isn…
... /> .......LD DE,0
.......JP MAIN
B2.....INC ... ; fetch highbyte (7)
.......JP (HL) ; jump indirect to emulationroutine ... 00
JP I03
JP I06
...
JP IFF ; last ... #83 (#8301)
...
JP IFD ; last (#8300-#83FF)
Games UNDERated by magazinesYep, a slight twist on the previous topic. Which were the games you thought were underrated by mags, but were really much better in your opinion. …
... reviewer would have thought that JP would be still so popular ...Games that benefit from a change in speed.Has anybody tried playing games on an emulator at different speeds? I've found that certain games are more playable with a slight speed tweak. Obvio…
... playable with a slight speed tweak. Obviously programs written in basic ...Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …
Z80 Emulator Source?Found a link to this on comp.sys.amstrad.8bit. i havent been with the discussion long but supposedly this is the source for a Z80 emulator. Forgive m…
... hl,hl ;hl=84xxh
jp (hl)
fetchend:
.ds ...Laser Squad Online(With Hidden Movement)I dont want Nemesis really , I played it but I dont think it it as good, er really , as the Spectrum version.I have played all versions bar amstrad. …
... guns and maps and generally tweak things.
I know ...Not just a pretty [inter] face!Hi everybody, I've got a DK'Tronics Light Pen up for grabs (see [url="http://www.worldofspectrum.org/infoseek.cgi?regexp=^DK%27Tronics+Light+Pen$&mo…
... /> [ This Message was edited by: jp on 2004-03-09 21 ...TASM, Z80 and Spec emusHi! Having some novice questions here regarding TASM and writing machine code for the Speccy emus... Now I have configured TASM into my EditPlus and…
... .e for using absolute calls - JP, CALL etc - instead of relative ...IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…
... to 0056 in ROM
jp 56 ;for smooth return to ... /> ld hl,58853 ;Create a JP NN at address
ld ...InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... where you could put a JP to your 'real' interrupt routine ...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 …
Mysterious bit of codeHi everyone, I found the follow piece of code in a game and was wondering what it does. ld bc,40ffh ld e,40h loop ld a,r …
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... ,(SPRXCO) ;
AND 7 ;
JP Z,DRAWNOX ;this part doesnt ... line on the screen.
JP DRAWSPY
DRAWCH1
INC ...A strange influence of Spin upon the Windows menusI disable the animations of menus and windows in Windows 98 because I want my menus to be as fast as possible and without useless frills. To make the…
... tinkered with the settings using Tweak UI. However, every time I ...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] ; ***********…
... to 0056 in ROM
jp 56 ;for smooth return to ...
ORG 0FDFDH
JP MainLoop
END
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 …
... />
HALT
JP MAIN
RET
CP 0
JP Z,INTEND
ORG 0FDFDH
JP MAINLOOP
END ...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 …
... A
JP MAIN
RET
CP 0
JP Z,INTEND
... +1),A
JP NZ,gob
... />
ORG 0FDFDH
JP MAINLOOP
...Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... A ;increase scroll position
JP NZ, MLOOP
RET< ... ;decrease loop counter
JP NZ, MODHLB ;and jump back ... />
DJNZ CLEARLP2
JP ZERO ;Skip the next bit ... ;decrease row loop counter
JP NZ, ROWLOOP ;jump back to ...The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... at end of table
jp z,#1ff8 ; Do last carriagereturn ...
