Sinclair ZX80 / ZX81 / Z88 Forums

Hi Moggy, > Does FIF's method of combing editor and vocab' leave less memory for program use? Only as long as the editor is loaded. You can restart without the editor and load in your saved screens without the editor there. loading is independent of the editor. My intention at some stage was to writ...

FIF 1.02 is now available. This fixes a bug with CLRATT, a couple of minor bugs/features in SETPOS and a rewrite of the DO/LOOP/+LOOP comparisons (negative steps were prone to error). ZXpand versions now have a jump table at location $441A. Two calls and one jump are provided: $441A = PopOne (callin...

A little question though. If I want to add new words with machine code, could you describe how to pass arguments. Are you just using the stack, or is top of stack a register, and which registers should be preserved? I fear I may have misunderstood you on re-reading the question. Yes, function argum...

FIF 1.01 is now available. This corrects a bug in the Chroma 81 version whereby the LIST word would never stop listing. I also took the opportunity to correct a couple of typos in Chroma 81.txt (thanks to Paul Farrow) and to document the 'various author' words in screens 8 & 9, except for the ones r...

Had a little play with the UDG version tonight. The UDG4ZXpand is below the keyboard controller. A little question though. If I want to add new words with machine code, could you describe how to pass arguments. Are you just using the stack, or is top of stack a register, and which registers should ...

Honestly Alan I'm not ducking anything I just don't have the skill set to know how a lot of this works, more of an end user who is bloody grateful for the efforts of those who can do. No problem Moggy. I've said before that I veer on the side of assuming too much. Mind you, it's a good way of getti...

You got the D/ and D- is this ok for D* ? D* (nd1\nd2 ... nd3) Uses/Leaves Double number version of '*' The PAP routines are just standard Forth 79 number formatting routines found in any work on the subject and not special to myself so not needing any explanation I would have thought? That definit...

Barnsley eh? I lived there from the age of 12-18 so I know it very well. I'm assuming you know that characters are defined using an 8x8 grid. The glossary gives the definition of CHRDEF as n1\n2\n3\n4\n5\n6\n7\n8\c CHRDEF n1, though a word, represents a byte giving the bit pattern for the first line...

D2* is missing from the glossary too or am I not looking hard enough?. I've only been putting words in the glossary that are in the core vocabulary, not defined in Screens, so that was quite intentional. I described the EDITOR words elsewhere after all. I was waiting until you were better to ask yo...

Thanks Moggy, that's a big relief. FIF indeed doesn't use the inverse characters for normal FORTH use however they can still be EMIT ed. The combination of EMIT and SETPOS might be useful for some simple games or somesuch. So I thought that having the ability to redefine the inverses was potentially...