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Announce: BASin r14b availableHere's the fix mentioned earlier for those of you that either are too lazy to update your OS (XP SP2 has been out aaaaages, Arjun!) or even junk that…
... Jimmy;303078]Whilst playing around with "Football manager" in BASin ... "), but was unsuccessful - how could this be done?
... :)
If a USR routine returns a value in BC, then ... [/quote]
That's fixed, thanks. Search/replace can't ... -
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... I've now fixed the problem in this new version which ... more stars=slower speed. But this routine is not optimised for speed ... of stars (now also fixed in this version by changing [b ... HL) ; XOR with current star byte
LD (HL),a ; replace result ... -
I've been wondering...The Spectrum, CPC, and Apple II had no hardware sprites, so what were those 2D objects in their games?
... Only one brick (or a small brick pattern) is ... display which you see is a fixed part of Spectrum memory, ... to copy bytes to this memory area. There isn ... You have to write a loop which will copy bytes to ... needed hardware sprites, because with a 1 MHz 6502, the ... -
ANNOUNCE: JSW64: Flash Manic MinerI am delighted to announce the gamma-release of [b][i]JSW64: Flash Manic Miner[/i][/b], which is available as a free download from [url]http://geocit…
... be fixed simply by removing the trellis, as I have in this ... wanted to write a variant of The Warehouse with this title!
I ... /> Because of this, I decided against replacing the vertical sprites with those of ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... />
LD A,H ; Exit loop if we have wrapped ... ; Simplified version of library routine
; This version - no selectable screen ... column TEXTCOLUMN
; With a leading space
LD ... br /> String4
DB "LOOP $0000 - Failed at $0000 ... -
BASin r14d - Final bugfix for the r14 seriesOk, there's not a great deal to "show" here, as most of the work has been going on "under the hood" so to speak. And there's been a [i]lot[/i] of wor…
... \ LD A,L\ ADD A,32\ LD L,A\ JR ... L,A\ JR C,$+6\ LD A,H\ ADD A,8\ ... LD H,A
... 1 pixel with no wrap
; Note: This routine uses AF'< ... LD DE, 16384
LD A, 191
_loop9: EX ... AF, AF' ; Loop 191 times
DEC A
JR NZ ... -
Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…
... the graphics (WRITE, XOR, with/without MASK etc)
< ... Prawn;327001]Thanks for posting this code.
Oooh, ... Therefore, if you keep writing a fixed value to the R register ... /> LD A, 10
loop:
LD R, A
JR loop
... -
Analogue BeeperThere's been a discussion on foro.speccy.org about multichannel beeper stuff, and since I had the camera out and the scope set up, I set about demons…
... /> ld c, 254 ; port
.loop
ld hl, wave
a zero (to tell the routine to go to ... the DEFB at the end with the following, and see how ... /onda_aspiadora.jpg[/img]
...this shows you essentially how mixing ... -
Speech reproduction on the Speccy - 2009 style?Thanks to Chapter 33 of [url="http://www.worldofspectrum.org/infoseekid.cgi?id=2000388"]Super Charge Your Spectrum[/url] by David Webb - "Speech Repr…
... , your rubber keyed friend has a built in DAC. Bet you ... I made a pretty convincing sine wave. The asm routine I used ... do than refine this routine.
You can tinker with PLEN - increasing ... j in the inner for loop to keep playback going at ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... when you start messing aroud with machine code is that your ... Why? Because the ROM interrupt routine is still active and will ... is this:
[CODE] ld sp,stack
loop jr loop
loop jr loop
stack[/CODE]
This probably isn't a major ... -
Playing 128k music with z88dk ?Hi, I'm amazed how easy seems to make things with z88dk to build spectrum asm programs. After my first approach I miss some way to play 128k music, s…
... routine label is not in this file
call music_routine ; or a fixed ... // place z80 in im2 mode with interrupt vector table located at ... 257-byte im2 vector table with all 0xd4 bytes
... stub at 0xd4d4 is consistent with the suggested memory map ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... easy when only 1 loop with 1 fixed register, but we can ... pressed
xor a
ld (hl),a ; reset last ... (hl) ; test on change (this happens during intrupt)
jr ... reclaim original HL
; A now holds the ASCII value ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... is easy when only 1 loop with 1 fixed register, but we can ... or (hl) ; test on change (this happens during intrupt)
jr ... ]
This is exactly what I mean ... /> to you and a lot of programmers this makes perfect sense
Tape and Disk breakpointsIs it possible to set a breakpoint on a .TAP, .TZX or .DSK file so that the debugger pops up when loading finishes? I'm talking about a breakpoint wi…
... like a clean BASIC loader with a clean listing, no line 0s, a nice ... etc. I just create a small LDIR routine to copy from one ... , BASIC overwriting, etc.), after this the decompressor is called, and ... Stack pointer) to create a endless loop. Then after loading in ...Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…
... . You'd need a sprite routine that took a constant time to execute ... it would have to draw a fixed number of sprites each cycle ... like trying to do a 50Hz update with a virtual processor running at ... might even consider having a crack at this if I ever finish ...Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... is only designed to work with 48K machines so it ... of the table
; at this address.
;
; ColorPRINT- ... BASIC.
; Use it with PRINT #4 CHR$ n (where ... loop ; finished?
ret ; return
; main interrupt routine [from a 2009 ...Russian Translations...As i have once again been reminded (by the "Homebrew games" thread), there are some funky looking Russian games that I can't play due to not understa…
... the original, and I was replacing only one message, I ... strings are surprisingly not at fixed addresses (they are totally ... problem by replacing some of the space padding with some other ... not start with a "PRINT AT" sequence.
Hope all this makes ...Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
... ROM patch was to use a fixed baud rate value for ... ROM patch, and so this is the best place to ... But if I have a machine code routine that accesses the low ... has ever reported any problems with them (which I assume ... and log it to a file. This would then remove the ...Travel with Trashmanits appears there were 2 versions released of "travel with trashman" although the physical cassettes look pretty much idenetical, 1 was a fast load (…
... had an extra byte in a fixed length, then got on to ... couple weeks with more to do.
Warning! this below ... is not releated to orignal post "travel with trashman ... ability to check for any routine, any tzx block
...The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... Rather than making two fixed traps, I used that ... %load, %save etc. with the same syntax as the ... 8 entry point along with any other extension to ... philosophy of having each routine do something small and ... /> Anyway, I think this is drifting a bit off the original ...z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…
... memory address would be interchangable with the usr command? (I.e ... />
[quote]
Is 65368 a fixed location for UDG:s or ... save a few bytes of memory that way.
Use this routine ... and then replace some variables with POKE to shift to them ...The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
[QUOTE=velesoft;385190]this Gasware version read TAP and ... 're absolutely right! Adding a delay loop has fixed it. What the hell ... t-states of a reset, or something...? Crazy. This is why I ... besides Enter as the "do with the currently selected file" action ...The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... absolutely right! Adding a delay loop has fixed it. What the ... .
This is wait loop from original ZX128 rom ... IDEAS:
- compatibility with 128 rom (autodetection) as on ... players with multiple sector reading, etc....). If user load this ...The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... 20x with bouncing then is sector reading very unstable and routine ... ; C = data register, 0x00 = loop x256
otir ; write first ... only 254 bytes
in a,(191) ; test write error ... [/b]
This routines with "software debouncer" work also on ...Test ROM Cartridge For SaleI'm selling another load of gear including a Sinclair Research Test ROM Cartridge. [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4000772…
... /> This test loads a routine into the 16K video RAM that executes a tight loop ... involving I/O. This simulates the ... RAM Test tests every location with a variey of patterns. If it ... location is loaded with 00 and FF. This will be of ...Creating a Spectrum game that won't load...Dear All, I have recently been using my ZX Spectrum as a reference for the production of a new body of art work and something I keep coming back to …
... suggest using a DivIde into the back with a virtual tape ... like this the mp3 or computer is ONLY replacing the ... like a tape that would loop..hhmm is tricky.. with an ... you could get away with using data statements etc ... mp3 on loop or a pc on loop to a REAL spectrum ...Creating a Spectrum game that won't load...Dear All, I have recently been using my ZX Spectrum as a reference for the production of a new body of art work and something I keep coming back to …
... gonna suggest using a DivIde into the back with a virtual tape.. ... it like this the mp3 or computer is ONLY replacing the tape ... something like a tape that would loop..hhmm is tricky.. with an pc ... on loop? I am a novice and apologise for needing this explained ...Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... ----------------------------------------------------------------------
For testing this the following MC routine was used:
... routine was invoked by "PRINT USER begin" and clocked with a ... The loop itself takes 45 T-states each round, this leaves ...Jonathan Cauldwell writes.I also found this in me old archives, which was actually written by Jonathan Cauldwell. Again, typos and editorial tags included for authenticity ;-)…
... are constructed, beginning with a sprite routine and a simple control loop to manipulate the ... character around the screen. This ... first control loop rarely takes long to ...
