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Multiply by 48Is there a 'cheat' to multiply by 48 in Z80? I have a table of sprites 48 bytes each entry, and I want to be able to offset my pointer with a simpl…
Is there a 'cheat' to multiply by 48 in Z80?
< ... -
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…
... of opcodes strung together and multiply defined variables. -
Long Lost ListingsWay back in the day when I still had those three issues of Sinclair Programs (which got lost in the Great House Move of three years ago DAMNDAMNDAMN)…
... . "Pencil" was a program to multiply two 14 digit numbers together ... -
Checksums in Hobeta filesDoes anyone here have any experience with working with the internals of the Hobeta (aka .$b, .$c ...) file format, or failing that, checksum algorith…
Does anyone here have any experience with working with the internals of the Hobeta (aka .$b, .$c ...) file format, or failing that, checksum algorithms in general?
There's a checksum at byte 0x0e, which, according to [url="http://www.nvg.ntnu. ... -
Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
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ADD HL,HL ;MULTIPLY BY 2 (2 byte address ... B
ADD A,A ;MULTIPLY BY 80 TO FIND BLOCK ... -
Does Sintech send articles to other countries?I think I am going to buy a membrane from Sintech. But I am in Turkey. Will they send the membrane to me? If so, are deliveries from Germany to Turke…
... ? I don't want to multiply the money by 2. And ... -
my new old sheffield music site :)[url]http://sheffieldmusic.multiply.com[/url] the era between 1986 and 1996 in sheffield music mostly gets overlooked, my new site is to redress the…
[url]http://sheffieldmusic.multiply.com[/url]
the era between 1986 and 1996 in sheffield music mostly gets overlooked, my new site is to redress the balance :)
if you like punk, indie, metal...have a peek -
Possible Fields addition to Infoseek.What about adding information about what type of Instructions were in each title. And a possible addition of what sort of case the item came in. Ie.…
... problems with this idea, ie. Multiply releases in different cases and ... -
A Poke in the right place (ooer, matron).Hi there. If anybody out there can help, I just wondered what is the easiest, most reliable way to insert a poke in a loaded game, as I seem to remem…
... , having just managed to get multiply mown-down by the JSW ... -
"8 CHANNELS" -ZX Spectrum BEEPER demoHi there. :) We finally managed to finish the BEEPER demo with 8-channels songs. You can get it from here: [url]http://pouet.net/prod.php?which=5…
... count the drums now and multiply them by 6. ;) Only THEN ... -
Well, that's me gazeebo'ed......yet I can still multiply (the wife was rounding up the bailey's alcohol content, I was doing it properly - don't ask; which inevitably means someo…
...yet I can still multiply (the wife was rounding up ... -
So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... !) how much you want to multiply the signal by. If you ... -
3D graphicsWould be there interest in some tutorial about 3D vector graphics on zx (my slowly paced side project) ? EDIT: [b]Content[/b] [list] [*]The Math [*…
Kiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…
... ;RETURN
;*********************************
;(MULTIPLY) BASIC MULTIPLICATION
;> A ... IS SECOND MULTIPLIER
;*********************************
MULTIPLY
DEC B ;DECREMENT B ...Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
... head nor tail of the multiply/divide routine)
Any ...ZX-7 instruction (BEEPER 8-channels editor)ZX7 was the most powerful ZX Spectrum 48K music editor end engine since 1988 to 2011 (when OCTODE appeared). [url]http://www.worldofspectrum.org/inf…
... for one song now and multiply them by 6. ;) That means ...Sevenup - bug or feature ?I have noticed a very peculiar behaviour of this great utility. I have for example a picture of 3 vertical lines which is 19 pixels high and 16 pixe…
... pixels must be an equal multiply of 8 as a single ...Overflow Detection while Scanning a Number from a StringI've got some strange behaviour from a subroutine that reads a number from a string and converts it to a 32-bit long. It's C's strtol if it helps to…
... a 40-bit unsigned 32x8 multiply in the main loop. ... bits of the 40-bit multiply) then result+=digit can ... t cause overflow following this multiply (ie there will be ... base 2, if you multiply by 2^n, you ... the max digit after the multiply is also represented in ...Outrun Europa in colourSwainy suggested that he'd like to try his luck with Outrun Europa colorful graphics and see if they can be improved. Let's give him the chance :) A…
... the step isn't a multiply of 9 the graphics will ...CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…
... be to implement CMWC (Complimentary-Multiply-With-Carry) RNG for Z80 ...Multiply the value of 'a' by 5Is there a way of multiplying the value of 'a' by 5? I've tried 'add a,a' etc. but only get multiples of 2...
Is there a way of multiplying the value of 'a' by 5?
I've tried 'add a,a' etc. but only get multiples of 2...assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... saying "sod it - I'll multiply by 8" - and another part ...Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
... know you in basic you multiply the vertical co-ord by ...Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... of this circuit is to multiply clock signals, and to recover ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... ,a,a
defb $04 ;multiply : 0.5,b,1,a ... ,xh,xh
defb $04 ;multiply : 0.5,b,1,a2 ... *xh/a2)
defb $04 ;multiply : 0.5,b*SQR(1 ...
