-
Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... =jamorski;717480]
[CODE];17 bytes and 66 clock cycles
ba"; "cd" --> "dc"; "ef" --> ... -
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…
... /> ret c9
;45 Bytes
Create lookup table ... 256 byte boundary (requires 256 bytes of free space whilst
ret C9
;17 bytes
256 byte table ... 1A 9A 5A DA 3A BA 7A FA
06 86 ... -
hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…
... first three & last three bytes, whereas it should be the ... hash table down to 548 bytes.
[code]
3 ... =INT (b/2):
LET ba=a-ba2*2: LET bb ... b=bb2:
IF ba+bb AND ba+bbc THEN LET v ... -
Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…
... (06)
db %00000100;line BA ;line 63 (04)
db ... of king
;191 bytes
chess_builder:
ld ... -
Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…
... (06)
db %00000100;line BA ;line 63 (04)
db ... of king
;191 bytes
chess_builder:
ld ... -
Jackpot poke needed - Fruit Machine Simulator 2Hi speccy guys, need a little help here dudes. I've been asked so many times now to the point I need to ask you, I've been asked to show a clip of t…
... the games POKE these 64 bytes into the memory at $FD00 ... ,$ED,$32,$0E,$E8,$32,$BA,$E8
$3E,$BF,$DB ... ,$32,$0E
$E8,$32,$BA,$E8,$C9[/code]
and ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... br /> ; de = pointer to 8 bytes graphic data
; b = ... de, shiftdata_lbuff
; copy 8 bytes to both buffers. this trashes ...
; de = pointer to 32 bytes graphic data. MUST BE ALIGN ... , #01, #BE, #7D, #BA, #5D
db #BA, #5D, #BE, #7D, ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... , shiftdata_lbuff
; copy 8 bytes to both buffers. this trashes ...
; de = pointer to 32 bytes graphic data. MUST BE ALIGN ... , #01, #BE, #7D, #BA, #5D
db #BA, #5D, #BE, #7D, ... coll_map BLOCK 24*24 ; 24x24 bytes for the collision
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... , shiftdata_lbuff
; copy 8 bytes to both buffers. this trashes ...
; de = pointer to 32 bytes graphic data. MUST BE ALIGN ... , #01, #BE, #7D, #BA, #5D
db #BA, #5D, #BE, #7D, ... coll_map BLOCK 24*24 ; 24x24 bytes for the collision
Little problem with AYmakeWell, I'm not sure if this post may be here, but, if I'm wrong, I'm sorry. I have a little problem using aymake. I want to convert a 48k's song, w…
... . I just get a 33 bytes long file with the header ...AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
...
In total 42 bytes
Finally is the ... offsets plus a final two bytes for the end of the ...LINE-routine and other nice pieces of codeThe line-topic came in the end with a nice piece of fast coding. I think that there might be more of these routines out there (where-ever-u-r). Isn…
... #81,#83,#82 (ETC... 255 BYTES)
org #8100
bytes.
Decision made from fetch ...Little problem with AYmakeI have a little problem using aymake. I want to convert a 48k's song, which needs to know the values of the registers. I know them, but I don't know…
... . I just get a 33 bytes long file with the header ...Loading with CODEHi all! I last played speccy games back in '91. that's when it died IMHO. It's good to see people are keeping the dream alive with emulators and util…
... LOAD "" you obtain a scrolling "bytes" message. ISTR that some games ...Spectral Invaders screenshot in the Saturday TIMES.I was just reading ''PLAY'' the arts & entertainment supplement in the Saturday TIMES newspaper. In the gaming section there is an article about the…
Turmoil MusicBit of a classical music question for ya all. Who composed the music that is used in Bug-Bytes excellent Turmoil and whats it called? Cheers in antic…
Bit of a classical music question for ya all.
Who composed the music that is used in Bug-Bytes excellent Turmoil and whats it called?
Cheers in anticipation folks :)How to play without POKEsI have a Speccy story, hope you will like it. It's about 13 years back. I was sitting in our living room and playing Dynamite Dan (part 1) on rubber…
... emulator will randomly change some bytes. ;)
[ This Message ...Turmoil PCHi, Just in case anyone is interested, I've just finished and uploaded my PC Remake of Bug-Bytes classic game "Turmoil" to my site. It follows prac…
... my PC Remake of Bug-Bytes classic game "Turmoil" to my ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... of a number of contiguous bytes in memory the number of ... bytes being held in the B ... this is to apply across bytes so that if bit 0 ...Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …
... a block larger than 256 bytes?
Q6) Why won ... need an intruptvectortable of 257 bytes if you can only adress ... 256 blocks of 256 bytes (=64 K) ?
Q8 ...Possibly *weird* .WAV request?Hello there! WOS has sure moved on since I last visited back in '99. Looking great! :) Anyway, I'm in the middle of producing a little homage to ZX…
... , during and just after the "Bytes: "
b) The sound during ...Solution for overwritten stack in 48k SNA filesIt has been known for quite some time now that the 48k SNA file format has one serious fault, which is described in the file formats section on the W…
... format is 49181 bytes, where the first 49179 bytes are the same ... and the last two bytes are extra bytes.
Before making ... , it first reads in 49179 bytes of registers and memory, pops ... standard format (without two extra bytes at the end), it just ...ANNOUNCE: SPECSAISIE 1.2 released!SPECSAISIE is a Java system which enables one to perform surgery on SNA and TAP files, and various other gubbins (some functions relate to Spectrum e…
... DATA line for each eight bytes, and a checksum for each ...ANNOUNCE: SPECSAISIE 1.2 released!SPECSAISIE is a Java system which enables one to perform surgery on SNA and TAP files, and various other gubbins (some functions relate to Spectrum e…
... DATA line for each eight bytes, and a checksum for each ...Z80 AssemblerSome of you may know that I'm working on a Z80 assembler. I thought I'd start a thread so I can see what people think and what they might want to see…
... symbol for 8 bit values. Bytes are then inserted from MSB ...BASin Release 6 available for DownloadHi all - It's another cut'n'paste from CSS :) I've been tapping away again, and seeing as a couple of people have recently seen BASin's latest bits…
... an expression) and memory location bytes, words and DWords.
Fixed ...
