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50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
…and it's a biiig problem for everything else, especially for interrupt handling. for me it's better to have jump table anywhere i want and more troubles with multicolor than slightly less troubles with multicolor and big headache with interrupts. %-) -
AY Magic version for ZX81 was bornModified Ay magic ,my previous interface for zx48. On board, ay chip based on Zonx interface but with stereo output and rampack 16 or 32 kilo on boa…
... note table and it will sound exactly the same, assuming 50Hz interrupt ... -
RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
... always) the values from this table:
[code]AF = xx40 (being ... the Z80 is 8080 compatible, interrupt mode is probably 0.[/quote ... -
New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…
... move the sprites around the table so they're drawn in ... . Assuming you're using an interrupt routine which increments the FRAMES ... along one position in the table. -
automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …
... been destroyed by an intervening interrupt by the time you read ... have to wait for an interrupt to occur. There is ... front, followed by the table and then the assembled code ... IY before calling. The table looks to have a very ... must have made the table smaller. -
Famous lines from filmsThe 'Favourite James Bond' thread put me in a Bond type mood, and a workmate just asked me if I'd done something and I responded "Do you expect me to…
... Wilson: Well, you mustn't interrupt now, because you're way ... too beautiful to interrupt people. When I was in ... you, no one at the table was Jewish. But she persisted ... ?
Mrs. MacGregor: Mustn't interrupt Daddy.
John Wilson: That ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... calculate-rotate sprite. So, my interrupt routine usually goes as follows ... , I usually call the Vortex interrupt routine to play music, and ... four. Do you use a table of pre-rotate bytes for ... -
z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... />
stdio maintains a table of FD* indexed by integer ... Unused entries in the table are filled by a dummy ... up the integer FD table entry and decreases reference ... Push corresponds to interrupt driven keypresses where an interrupt routine sends characters ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... , 0x3b ; high byte of vector table
ld i, a
jp 56 ; exit via BASIC interrupt handler
blit: ; subroutine ... /> jp im_main ; jump to main interrupt handler
org 0xfff7 ... -
How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... typically do is put an interrupt vector table from 65024-65280 (set ... the table for a JP nnnn instruction to my real interrupt routine ... . Or fill the table with 255, and ... use the addresses above the table (65280 upwards) for variable ... -
How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... typically do is put an interrupt vector table from 65024-65280 (set ... the table for a JP nnnn instruction to my real interrupt routine ... . Or fill the table with 255, and ... use the addresses above the table (65280 upwards) for variable ... -
Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... wrote my first non ROM interrupt routine last night-I [I ... enough place to stick the table for a 48k machine then ... -
Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... thought about what kind of interrupt routine I'll be using ... typically do is put an interrupt vector table from 65024-65280 (set ... the table for a JP nnnn instruction to my real interrupt routine ... . Or fill the table with 255, and ... -
A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... maxsprites = 10;
// Table Holding Movement Data for Each ... -
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... sprites regardless. My screen line table is 256 lines long and ... at the beginning of the interrupt to draw/animate tiles, and ... />
Although using this initial interrupt period for other tasks could ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... 257
defb 253 ;interrupt vector table, high byte and low byte ... -
BorderTron 3000A little bit of speccy-related fun for a Friday afternoon... I've knocked together a program for Windows which I've called Bordertron 3000 (a suitabl…
... , you can share the interrupt vector table and ditch the code in ... that sets up a vector table at $FE00, etc. -
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... /> It runs as an interrupt mode 2 service routine and ... 0x3b ; high byte of vector table
ld i, a
jp 56 ; exit via BASIC interrupt handler
blit: ; ... /> jp im_main ; jump to main interrupt handler
org ... -
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 …
... float over there in a table, in terms of:
- Can ... one can look at this table and choose whatever printing routine ... /> im 2 ;switch to our interrupt routine (which only do a ... -
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 …
... ,192 ;high byte of a table containing 'letter addresses', placed at ... interrupt routine
ei
ret
org 65024 ;vector address table ... -
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 …
... interrupt routine
ei
ret
org 65024 ;vector address table ...
