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A table of AY frequenciesHi friends, Simple request I hope; does anyone have source for a table of note frequencies on the AY chip as used in the Spectrum 128? I had a loo…
... of the sound generator tone registers for a given note.
16 Hz, Error=-0.08%)
16 Hz, Ideal=1174.64 Hz ... ( 8526.20 Hz, Ideal= 8372.16 Hz, Error=+1.84%) C9 ... (10076.42 Hz, Ideal=10548.16 Hz, Error=-4.47%)
Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... 't have a lot of registers, so it's not doing ... is the lack of ANY 16 bit registers.
The 6809 ...Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... . The lack of registers (especially the 16-bit paired registers) makes it less ... as 256 possible quick-access 'registers' then you can see how ...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... swap around my use of registers when certain values are no ... ) or (X2,Y2) in different registers depending if you're drawing ... that initially look like a 16-bit multiply or divide is ... say, the right-shifts of 16-bit numbers.
I ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... seems counter-intuitive to PUSH registers to the video ram as ... /> The simplest method of copying 16 bytes per pixel line with ... raster.
Doing more than 16 bytes requires careful work to ...Best compiled Basic game ?I was thinking about this before I posted the topic about Melbourne House's excellent Penetrator scrolly but held off, however a kind [url="https://w…
... DE
LD A,$16
RST 10h
LD A ... DE
LD A,$16
RST 10h
LD A ... DE
LD A,$16
RST 10h
LD A ...this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …
... STACKA
CALL GETRND
RST $28 ; FPCALC
defb $04 ... $25F8
CALL STACKBC
RST $28 ; FPCALC
defb $A1 ...
defb $37
defb $16
defb $04
defb ...How to write a simple BASIC* horizontal scrolling game (Tutorial) [b]How to write a simple BASIC* horizontal scrolling game[/b] In this tutorial, we will be talking about how to write a simple BASIC* horizont…
... to decompile everything up to 16/244 (DJNZ DIS followed by ... numbers are put in some registers, two of these numbers relate ...Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…
... SPLD.
And having registers in a PLD takes up ... the sub-rate to differentiate ( 16 colour mode ) or simply routes ...New (latest) Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike DaillyNew latest Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike Dailly V2.15.2 As seen on Facebook yesterday: [quote]Mike D…
... /> New version of #CSpect - V2.16.0
[url]https ... />
Added directory functions to RST$08 plugin
Fixed screen ...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…
... can toggle between 8 and 16 bit registers by turning View -> ... ; 8 bit registers on and off
registers Hex mode instead of decimal ...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…
... row in screentable (= tbl_scraddr + row*16)
sla b ; row = ...
sla b ; row = 16*row, sets carry if > ... + #16e0, SCRBUF_BASEADDR + #17e0
; 16 byte buffer for drawing graphics ... 8 bit adds, no index registers used). I probably won't ...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…
... a macro which does allow registers to be used for the ...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…
... a macro which does allow registers to be used for the ...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…
... to be used for many 16 bit operations though (e.g ... as useful as the other registers.
Returning a single ...Sound emulation...I recently souped an 486 I had with some memory, a Soundblaster 16 and CD-ROM drive. It would have been a monster just a few years ago [img]/__forums…
... with some memory, a Soundblaster 16 and CD-ROM drive. It ...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…
... know the values of the registers. I know them, but I ... , suppose there were only three registers (to make the example shorter ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... ,didnt understand all this about registers and memory addresses,and i ...Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …
Moonlight MadnessI have a little problem with the game Moonlight Madness. I catch the 16 keys of the securebox but i don?t have the combination of it. Please help me …
... Moonlight Madness. I catch the 16 keys of the securebox but ... el Moonlight Madness. Consigo las 16 llaves de la caja fuerte ...Spectrum RRP's: do you remember?Okay kids: I'm sure a lot of you got a Spectrum for Xmas 1984. What I want you (or anyone else for that matter) to tell me is how much the Spectrum c…
... /> My brother got a Commodore 16 that year (can't explain ...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…
... know the values of the registers. I know them, but I ... , suppose there were only three registers (to make the example shorter ...Spectrum disc/cassette magazinesI was just wondering, what Spectrum disc or cassette magazines are there that are in English? I know of AlchNews, 16/48 and so on, but what else are …
... English? I know of AlchNews, 16/48 and so on, but ...
