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An intriguing question...Well, intriguing for me anyway. As we all know, when calling a Machine Code function from BASIC, we use the USR (address) function. But for this to …
... BASIC, we use the USR (address) function. But for this to ... -
Tape files holdback. What the ....Greetings Gurus. :) I have a problem about TAP and TZX files that I find most annoying. First, I must say I use ZX32, but I found this to happen as …
... others) I always put the fastest tape speed possible. basically most ... -
FAO Sharopolis - you have a virus.I sent you an e-mail to the address in your profile about a possible trade a couple of days ago. I got a "reply" just now from that address with an …
... an e-mail to the address in your profile about a ... "reply" just now from that address with an attachment.
Current MIA list wantedWith summer coming along, the Bridgemary Car Boot sale will be packed with sellers (a whole field, a car park and hopefully two school playgrounds) a…
... ..
(my e-mail address is [email="patrick@wych1.fsnet ...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…
... of code to a specific address? (i.e for using absolute ...Antique Toy 2004 Voteing ( Music/Graphics )In case anyone doesn't know or missed it, at RAWW.ORG and SCENERGY they mention voting for Antique Toy compo is happening now until August 10th. If y…
... .
E-mail the address for their reception, and also ...ZX81 game, not in infoseekI was at the local boot sale yesterday and in the pickings I found a zx81 game. It is by Babtech anf is a double header UFO and 3D Maze for the 16k z…
... and 3d monstermaze clones). The address on the inlay is 3 ...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…
... /> ld de,58881 ;pointers to address
ld bc,260 ;229 ... ;Create a JP NN at address
ld (hl),195 ;58853 ...Strange layout of Spectrum video memoryHello, does anyone have an idea why the Spectrum's video memory has such a strange layout? I understand that a resolution of 256x192 is an easy mean…
... two, making it easier to address video memory. I also understand ...2 questions regarding partial port decoding1) What happens if the Spectrum reads from a port whose number matches the criteria for more than one device ? Does only one of the devices get to r…
... 31", corresponds to a port address of "????????00011111", but what are ...ZX Sonic...Hi, has anyone got the link to the ZX Sonic project page (saw it in Retro mag, but forgot the address). I tried searching just now but can't seem to …
Hi, has anyone got the link to the ZX Sonic project page (saw it in Retro mag, but forgot the address). I tried searching just now but can't seem to find it - thanks! :)A few questions regarding EmuZwinA few questions regarding EmuzWin 1. I have been trying to write a program to generate multicolour effects on the Spectrum,ie more than 2 attributes…
... seems to generate the wrong address for a label I have ...A few questions regarding EmuZwinI had posted this in the development forum and then remembered there was an emulators forum, so apologies for the repetition. 1. I have been trying …
... seems to generate the wrong address for a label I have ...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 …
... D,A ;| so, in HL - address for shift table into one ... side, in DE - address for shift into another side ... HL,(SPRADR) ; taking precalculated screen address where to draw sprite
CALL DRAWCH1 ;returns an address of next bottom line on ...Calculate screenaddressWho knows where the topic about the fastest screenaddressroutine is? I can't find it in a search.. The fastest routine was to load a large table of …
... where the topic about the fastest screenaddressroutine is? I can't ... a search..
The fastest routine was to load a ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... Contains Screen Address
; DE Contains Char Address
... ACHAR
; Calculate address of char
; ... /> ; HL Contains Screen Address
; BC preserved ...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] ; ***********…
... Contains Screen Address
; DE Contains Char Address
... ACHAR
; Calculate address of char
; ... /> ; HL Contains Screen Address
; BC preserved ...Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…
... website to find my email address.
I've noticed ... BASIC section, but the web address is outdated. Use the one ...sem033.exeCan anybody send sem033.exe emulator to my e-mail address [email="mstancevic@sezampro.yu"]mstancevic@sezampro.yu[/email] ? I can't find it on the Int…
... emulator to my e-mail address [email="mstancevic@sezampro.yu"]mstancevic ...Looking for Russian or Eastern SpecchumsAs some of you might know, the Speccy Tour 2004 is near. We're pretty happy with both UK and Spanish players participation. But something tells me th…
... /> * At least, point me the address of some Eastern web master ...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 …
... /> #DEFINE SCREENTABLE 0FB00H ; SCREEN ADDRESS LOOKUP TABLER
... ; HL CONTAINS SCREEN ADDRESS
; DE CONTAINS CHAR ADDRESS
; ON ... ; DE CONTAINS NEXT PHYSICAL CHAR ADDRESS
PCHAR: ...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 …
... #DEFINE SCREENTABLE 0FB00H ; SCREEN ADDRESS LOOKUP TABLER
#DEFINE ... HL CONTAINS SCREEN ADDRESS
; DE CONTAINS CHAR ADDRESS
; ON ... ; DE CONTAINS NEXT PHYSICAL CHAR ADDRESS
PCHAR:
Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
... calculation of the final memory address, based on IX and the ... , and 5T for the final address calculation (the Internal Operation). All ...Fast division in machine codeHi Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code. Derek [ This Message was edited by: dmsmith on 2004-0…
Hi
Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code.
Derek
[ This Message was edited by: dmsmith on 2004-09-24 20:04 ]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…
... indicating the start
* address of graphics for that particular ... SCRMODA LD DE,16388 ;screen address of top left
... ;HL=screen addr.
;DE=address of tile graphics
ADDRESS AGAIN
SKIPB ...Message for GilbyHi You have conacted me via bay about buying "Terror rom the deep" several times. I have replied to your mails but there appears to be something wr…
... alternate contact method or email address ?SPIN - debugger / fill memory / how ?I try to fill the screen with 00 value, but I don't get the expected result. - pause the game - debugger - hex numbers - fill memory block - fill wi…
...
- main memory
- start address - 4000
- lenght - 0800 (for ...YSRnRY documentary - BitTorrent problemsWell, I installed that new ADSL modem/router/switch thingy, and there's a slight hitch. The IP address of obdwww.egyptus.co.uk is 80.168.134.171, an…
... hitch.
The IP address of obdwww.egyptus.co.uk ... as a second IP
address.
I've tried ...looking for a zx 128k/+2I used to own a spectrum 128k +2 (I think this is the right one) It was a tape loader that was connected to the keyboard. Unfortunately my bro sold …
... . Problem is - i changed my address and now ebay wont let ... me change the email address (ive messed it up somehow ...
