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Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
... it self-modifies(pokes) a relative jump to the state. This removes ... , (c)
jump jr nokeysmid ; modified relative jump
nokeysmid ld ... a, mid2left-jump-2
Assembler Shortcuts Reference?Can someone please refer me to a page of assembler shortcuts; ie. concise ways of doing things in a few bytes which might not be immediately obvious?…
Automatic opcode to machine codeHi everyone, Would people use a program that you enter opcodes and it automatically converts them to machine code and saves them to a file. So if yo…
... implement 'real time' direct and relative Jump forwards? How about forward Calling ...Problem with se basicI use MB02 memory paging (ram 16kB instead 48rom) and via one OUT 23,xx can switch between original 48 rom and SE ROM. But if I write basic program i…
... 0xF3 and thus a backwards relative jump).[/QUOTE]
Some years ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... 'll have a "skip conditional jump, JR, next check" delay before ... conditional, absolute JP (faster than relative jump), such that when condition is ...SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... , copy_buff, copy_3 and the preceding relative jump then the code will work ...SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... , copy_buff, copy_3 and the preceding relative jump then the code will work ...Opcode QuestionsHi all, I am an experienced LabVIEW progammer and also have fond memories of the spectrum. Thus I started to think about writing my own emulator an…
... signed offset, giving the jump destination relative to the next address after ... zero would effectively perform no jump, and just move to the ... (equivalent to minus 2) would jump back to the DJNZ instruction ... don't forget that the jump only happens if the final ...OpenSE Software CompatibilityWith the earlier Open82 project a page was set up on Wikia ([url]http://scratchpad.wikia.com/wiki/Open82[/url]) with compatibility information on var…
... juggle the routine because a relative jump went out of range. Einar ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... bit faster. Right now I jump at the end of the ... doing LDIR, followed by a relative jump and the last three bytes ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... bit faster. Right now I jump at the end of the ... doing LDIR, followed by a relative jump and the last three bytes ...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 …
... had a "CP" and a relative jump. Further the same by calling ...OpenSE BASIC disassembly?The [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]OpenSE BASIC[/URL] page provides a source code listing, however it doesn't really…
... itself
jp ram_check ; jump to ram_check
nop ... hl
jr l0013 ; relative jump to 10013
... ; zx81
jp print_sp ; jump to print_sp
l0013 ... hl
jr error_2 ; relative jump to error_2
;
...OpenSE BASIC disassembly?The [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]OpenSE BASIC[/URL] page provides a source code listing, however it doesn't really…
[QUOTE=Dunny;651732]
[code]
jr l0013 ; relative jump to 10013
[/code]
Hope that helps.
[/QUOTE]
No, you made a mistake :pAssembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …
... . For example to see how relative jumps are encoded, the order ... calculating the distance of a jump). Of course you're free ...Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
Running short of ideas now, but saved another byte and speeded up the line incrementing a lot.
[CODE]ld b,#XX 06XX ;Hi Byte of Lookup table 7
Scr_add ld hl,#4000 210040 ;Left hand side 10
ld de,#401f 111F40 ;Right hand ...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…
... 6147. 6147 assembles to a relative jump over the REM statement and ...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…
... 6147. 6147 assembles to a relative jump over the REM statement and ...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…
... br /> jr str_test ; immediate jump
org ... br /> jr nz, x80_fread_2 ; jump if not
halt ; read ... e, (hl) ; size of relative jump
ld a, e ; ... br /> jr nz, x80_fjp ; jump if not
exx ; alternate ...FZX Driver for z88dkAn fzx library for z88dk can be downloaded [URL="https://drive.google.com/file/d/0B6XhJJ33xpOWM2hWNjAxMVkxaEk/edit?usp=sharing"]here[/URL]. The libr…
... works a bit like a relative jump, moving the next print position ...Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…
... data and all jumps were relative. One of the 16 instructions ... over 200 passes of the jump optimiser :)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…
... could be made faster with relative jumps and the like, but ... br /> JP (HL) ; do the jump to the routine
jump table is high-byte ... all of your routines can jump back to.
...Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... , could you set up a jump offset type of routine that ... as the offset for a relative jump. That might save some time ...Opening my new game projectHi I am working to a new game (tentatively called "Donkey Kong Reloaded Done Better"...i was not happy with the graphics of Donkey Kong Reloaded) whi…
... in version 37 you can jump off the white bricks..the ... some fine tune
(the relative lines are in code 0 ... " (it is not a real jump but the sprite is repositioned ...ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... an error report when a relative jump is out of range. Instead ... change a piece of code (relative to absolute) with a right ...ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... an error report when a relative jump is out of range. Instead ... change a piece of code (relative to absolute) with a right ...
