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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 …
... p_at and p_print subroutines back into the p_main section ... after by resetting D back to what it was ... /> jr p_start ;loop back to do it all again ... b ;to the corresponding first byte of Spectrum
... all 8 bits of the byte
.......
ld ... -
What were the first games?Is it possible to chronlogolise (!) The first I saw must have been November 82 and it was Gulpman!
... , Bug Byte and Quicksilvia led the way out of the back bedrooms ... .95, In 1982. [/b]Bug Byte spin-off companies such as ... (see 1983). Eventually both Bug Byte and Quicksilvia went on to ... -
FMV on +3eOK, so about 6 months ago i posted here that i got full motion video on +3e, with a bunch of scr files called passion. I added the glider rider music…
... As for timing, one 512 byte sector takes 69 samples to ... the video and then read back all the sectors (at ... player code. The next byte is normally 255, which ... frames
.........
1 byte value 255 to mark the ... table, it will drop back to basic. If space ... -
Correct flag response to BIT n,(HL) etc.When running the test program suggested by Arjun (thanks again), all intructions are passing the flag tests except the BIT n,(HL), BIT n,(IX+dis) and…
... ones which I will get back to.
My BIT ... are copied from the high byte of MEMPTR after it is ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
...
;Rotate the Character Data Byte D times - and Shift the ...
;get the Screen Address back into DE, increment the MSB ... Character Data back and increment it ready for the next byte of ... the Counter value back, decrement it and go back for another write ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... 've written a small (56 byte) routine that will print the ... /> ld a,255 ;point UDG back to original value
ld ... -
'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... the screen. The less-significant byte is the number of character ... -90, but let's come back to that later.)
byte boundary.
inc l ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
...
;Rotate the Character Data Byte D times - and Shift the ...
;get the Screen Address back into DE, increment the MSB ... Character Data back and increment it ready for the next byte of ... the Counter value back, decrement it and go back for another write ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... e,a
;transfer Attribute Byte to e for easier use ... the Y and X values back into BC
call print_attribute2 ... - then set the Attribute Address back
ret
[/CODE ... -
Spectranet on the BBC!Yay! I'm famous. Or at least my +3 is famous... [url]http://news.bbc.co.uk/1/hi/technology/10364135.stm[/url]
... asm or squeezing every last byte out or whatever, it's ... . It's not about "looking back", it IS about looking to ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... see there's a back buffer, of 10 byte tiles. These seem ... . (I did see that one byte seems to hold how many ... be kept in one 256 byte page. I also have a ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... of screen data and one byte for an attribute.
byte character buffer at SP1V_PIXELBUFFER. Then ... jump to SP1RETSPRDRAW which is back inside SP1DrawUpdateStruct. There the next ... -
spectrum copyright etcjust curious. does anyone know of any cases where someone has been prosecuted or sued for selling copyrighted spectrum material? or for that matter …
... only an agreement with bug byte? that he got out of ... went bust... the copyright reverts back to the original author?!?! -
1K ZX81 "Chariddy" games competition mate..I'm trying to put together a Cronosoft 1K ZX81 gamestape in the style of the old "JK GREYE" 10 games tape that I remember owning about 28 years ago. …
... game. Scoring and lives are back, the screen is a little ... bytes though, excluding the 10 byte demo program, so I'm ... -
Outside world interfaceHi all, Im a newbie! 30 years old, bought up programming spectrums! I have no idea how to program PCs and want to write a program to control a se…
... . You can then use the byte you have written to that ... interfaces that do this available back in the day, and there ... -
Message to all programmersHello folks, more and more programmers in the recent time are using special loading routines for their Homebrew-Software. This makes their game runn…
... (all bytes, plus the checksum byte), the return routine changes the ... . I don?t want go back to this state of the ... -
Challenge: Make a Speccy version of "Leisure Suit Larry 1"and put it on this site as a rom c'mon be nice!
... be seen via the way back machine:
[url]www ... the words have the usual byte thing added to the last ... and copying the translated words back into the game. But you ... -
Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…
... issue) was only ever 1 byte per number but does have ... am wondering whether a step back to two different approaches which ... -
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... to give much of it back as you move the stack ... about optimising a push/pop byte copier that uses a loop ... -
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... to give much of it back as you move the stack ... about optimising a push/pop byte copier that uses a loop ... -
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... five cycles for just one byte, where PUSH has SP on ... when it kicks in, and back to LDI afterwards. Has anyone ... -
New RZX Block Type Suggestion -- AnnotationWho is maintaining the RZX specification at the moment? I'd like to ask for the feasability of the following request. Annotations embedded within th…
... .e., the time never goes back). (We might eventually change this ... width. I guess single signed byte can be used to hold ... -
Spectrum lost upper memoryHi again, I have a Rubber key Spectrum(issue 4S) which lost it's whole upper memory. It's worked okay, but i forgot it on over last night. My son wa…
... PEEKing back certain bits (each chip holds one bit of each byte ... -
Time function?How do you do a timer? Example: Start timer If timer = 10 seconds then reset timer Thanks
... saturation (when an incrementing byte goes from 255 back to 0) happens ... -
Spectrum PackageHi all, I'm only new to this. My dad was a BIG spectrum fan years ago but unfortunately gave it up a long time ago. Going through some of his old st…
... (Silversoft)
Roboto (Bug-byte)
Confuzion (Incentive)
Rubicon (Bug-byte)
Hunter Killer Run Silent ... Agent XII : The Mad Profs Back (Mastertronic)
Hot Rasputin ... II (Mastertronic)
Back Packers Guide to the Univers ... -
Spectrum ZX Games For SaleHi all, My dad has recently came across his Spectrum ZX and games upon delving into his stash of computers. Does anybody out there still use them,…
... (Silversoft)
Roboto (Bug-byte)
Confuzion (Incentive)
Rubicon (Bug-byte)
Hunter Killer Run Silent ... Agent XII : The Mad Profs Back (Mastertronic)
Hot Rasputin ... II (Mastertronic)
Back Packers Guide to the Univers ... -
Machine code issue...Hi Folks, My trials with MCODE continue and I am stuck. I wrote the following program in BASIC to simply POKE an attribute byte in to a "box" on th…
... ; Put it in the High Byte
ld a,l ; We ... the Low byte
ld l,a ; Put it back in L ... -
ccompletly baffeled machine codeHi everyone, BEFORE you ask i have not asked help for loads of problems i have recently now encountered and i figured the problems out myself, hones…
... ld (hl),a ;write byte to screen
inc ... de ;get next byte of Character "A"
back
ret[/CODE] -
Machine code[CODE] OPCODE HEX ADD LD A,05 3E05 F000 LD B,00 0600 F002 INC B 04 LOOP F004 CP A,B B8 F005 JP NZ,LOOP C2F003 F006 LD B,00 0600 F009 LD …
... 34h then the 12. small byte first.
But it ... the low bit, then going back to the high bit if ...
