Sinclair ZX80 / ZX81 / Z88 Forums

thanks! i’m going to try it asap!

so i guess this might work somehow (i’m going to test it soon on Boriel’s ZX-Basic Compiler): for eee=0 to 767 seed=smsrnd(seed) dfile=peek uinteger(16396) poke dfile+$8000+eee,seed next another question: the colours available from chroma81 are those like from zx-spectrum’s bright 1 (or bright 0)?

thanks!

A description of the colour modes can be found at the end of the document available from here . i guess it is where it says "Colour Attribute File [Colour Mode 1] (appears in memory map between $C000-$FFFF, at DFILE+$8000)" so if we poke randomly between 0xC000 and 0xFFFF we will have some colour a...

From http://www.boriel.com/wiki/en/index.php/Main_Page ZX BASIC ZX Basic main page. The ZX Basic compiler project documentation. ZX BASIC is a BASIC compiler for the ZX Spectrum vintage machine. Alphabetical Keyword List Language Reference & Syntax Is this relevant? partially - by using this cross-...

i’m interested to access Chroma81 colour attribute area from Boriel’s ZX-Basic Compiler (what i have done up to now for ZX81 using this cross-compiler is at http://www.boriel.com/wiki/en/index.php/ZX_BASIC:Released_Programs_-_ZX81 ) where from can we can get documentation about, or examples in assem...

thanks! :) and btw, talking about ay sound, i tried this (quicksilva ports, i guess): out $7FFF,7 out $7FFE,$38 out $7FFF,0 out $7FFE,$FE out $7FFF,8 out $7FFE,$0F i tried to get a 440hz (A-4 from germanic notation) on channel a, with volume 15 (100%) - and there is no sound at all - what might be w...

thanks! my point about using Boriel’s ZXBasic Compiler is exactly for avoiding C! :D (due to laziness! :D) - and also, i were interested on sharing the idea of using such amazing cross-compiler as Boriel’s ZXBasic Compiler is, for developing stuff for ZX81 my doubt about stack point and ram sizes av...

updated, i found out how the keyboard works

finally i could get a working zx81 code compiled from Boriel’s ZXBasic Compiler! :) but i have some questions about: 1- i'm struggling to use functions that uses more than one argument, because they use ix and iy registers - when i try to use them the display gets totally blank (the functions i'm us...