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Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…
... about data bus stability during interrupt ? Z80CPU need stable vector value ... data bus and during IM2 interrupt CPU read different vector than ... read different adress of IM2 routine and program crash...
Thinking of modding an Atari paddle controller for games like Arkanoid...Hello, Was thinking of trying out a controller mod using an Atari 2600 paddle controller to use with games like arkanoid, Batty, etc... The paddle c…
... /existing games :)
The routine that does the important thing ... :
[code]
;Called at interrupt time (for example). Uses Kempston ...DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…
New routine for install 8kB rom image ...
OUT (23),A ;disable interrupt,disable MB02 memory,set divide ... ]
Before start this routine must be loaded 8kB ROM ... support DIVIDE128 paging mode. This routine can be used also for ...Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... 't need a 256 byte interrupt table as the low byte ... of the interrupt address is always $FF.
interrupt service routine pointer as this is somewhere ...Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... . Placing the mouse routine in the 50Hz interrupt is not good enough ... position. It then triggers an interrupt a few milliseconds later which ... to write your own counting routine. And it would have to ...Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... =Crisis;710432]
is the routine off disciple adapteble or is ... better to write a new routine (not by me)
[/quote ... add-ons mostly depends on interrupt communication, as far as i ... understand. The interrupt-jump-table-gab is such ...20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... contention will affect your routine differently depending on the ... another position to make your routine work.
... routine starts perfectly synchronized with the raster scan. Although an interrupt ... lot more if the interrupt occurs when executing other ...30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... an IM1 interrupt to occur, which means the Speccy ROM routine kicks ...30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... an IM1 interrupt to occur, which means the Speccy ROM routine kicks ...BIFROST* example: "Knights & Demons DX" source codeA package containing the source files of our multicolor game "Knights & Demons DX" is now available for download [URL="http://www.mediafire.com/?hbch…
... ! Although BIFROST* provides sub-routine [B]BIFROSTsetTile(px, py, ... instead to create another sub-routine ourselves. Fortunately implementing [ ... ld a, i ; check current interrupt vector
ret p ; ...Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... if you use some interrupt-driven routine to put these already scrolled ... ;postcount=16"] Battle Bunny's routine[/URL] finally takes 1 fetch ...Barn find #4I think this is some sort of backup device. Its got "007" on the motherboard and the mice have chewed the buttons. Will do a little research later in…
... Z80 CPU via a NMI routine.
So if we add ... will not be able to interrupt the Z80 CPU.
Now ...Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…
... the bugs in the heart routine
[*]Fix the timing issues ... , steal some space from the interrupt vector table so do post ...Asm routine for AY playback?Hi, is possible to create and "name" an asm routine for playing some ay data? If yes, how? Example: Ok , I've finished a sound tracker song, now I n…
... alternative to calling within an interrupt service routine.
Also the ...Break into programIs there any way of stopping people using the break option in my software productions so they can list the code.
... ]This is why the TRAP routine which I posted earlier starts ... machine cycles before an interrupt, then the interrupt will put it's ...How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... 16144T[/CODE]
This routine will work on all Spectrum ... 48K (starting 15920T after interrupt), 228T in a Spectrum ... Spectrum +3 (starting 15977T after interrupt).
You ... . Just repeat the above routine multiple times, alternating between ...How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... before each interrupt.
Now repeat the above routine multiple ... interrupt, this won't be a problem.
This new routine ... 48K (starting 15936T after interrupt), 228T in a Spectrum ... 128K (starting 15990T after interrupt), and 228T in a ...New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…
... CPU time, sound routine can be called 1x per interrupt (similar as ...New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…
... CPU time, sound routine can be called 1x per interrupt (similar as ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
[code]; THE 'MERGE' CONTROL ROUTINE
org 0x08b6
me_contrl:< ...
; THE 'SAVE' CONTROL ROUTINE
org 0x0970
sa_contrl ... /> sa_1_sec:
halt ; wait for interrupt
djnz sa_1_sec ; jump until ...NEW GAME: Elixir VitaeOnly 2 weeks after Janosik I have a pleasure to announce my next creation - a logical minigame called [B]Elixir Vitae[/B]. Just like another Polish …
... need a separate custom routine for rendering the first ... 48K (starting 15891T after interrupt), 228T in Spectrum 128K/+ ... 2 (starting 15941T after interrupt) and 228T in Spectrum ... interrupt).
The problem is, in order to use this routine ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... add
ret ; end of routine
; THE ... br />
; THE 'RETURN' COMMAND ROUTINE
org 0x1f23
return ... /> halt ; wait for maskable interrupt
dec bc ; reduce ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... scheduler is run on every interrupt and one of a number ... - d1d3 ------- JP to im2 service routine (im2 table filled with 0xd1 ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... />
; THE 'INITIALIZATION' ROUTINE
org 0x11cf
start_new ...
im 1 ; interrupt mode 1
ld ... /> ld (nmiadd), hl ; nmi routine
dec (iy - _kstate_4) ... add hl, de ; address of routine
jp (hl) ; immediate ...SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
... or via a hot-key interrupt, I could list out ... from SCREEN$ into my routine so I could then ... altered by the initialisation routine which sets up the ... as well make the routine self-relocating into the ... fitted it into the dump routine just yet.)
idea: new gaming interface for ZX Spectrum (48k)First of all, I am not an expert this is just an idea of what I would like to see happening in the modern era of the ZX Spectrum. A compact, small, …
... -states to respond to the interrupt and service it. Best case ... cycles to respond to the interrupt and get its vector, and ... 3 to jump to your interrupt service routine), leaving you only 5 ...Cross platform developmentI'm just vaguely considering supporting a few more retro 8 bit platforms for something I have in mind to do. Just Z80 and 6502 really, but that cove…
... stuff though and modify the interrupt service routine, and add or modify ... IBM) and rewrote the init routine in C, looked at the ...
