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BASIC games.I remember back in the day, there was a way you could read through the BASIC of certain games, such as Football Manager or Johnny Reb. I can't rememb…
... tape) and not the Gods.z80
(Full instructions for the ... , while the invisible 5-byte floating point representations are intact. - That was ... -
Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... when I look at the floating point multipliers, which require retaining the ... can be done on the z80 in registers (with the help ... -
Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... I'm considering the larger z80 world, which includes tens of ... millions of legacy z80 embedded systems. Those systems' ... new systems still target z80-related designs and those ... in specific circumstances. Floating point or fixed point sits on top of ... -
Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... stored as smallints rather than floating point decimal and additions & subtractions ... machine code to use the Z80 bitwise operators using the method ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
...
Some z80 applications need a floating point library for their programs ... It consists of the following floating point functions:
... the part of the floating point library that does that ... no universal routine in Z80 programming - almost every ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
...
Some z80 applications need a floating point library for their programs ... . It consists of the following floating point functions:
... the part of the floating point library that does that ... is targetted at any z80 machine. But just one ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... when you have a large z80 library with subroutines meant to ... will happen with any significant z80 library meant to be shared ... examples I gave were a floating point math package and a real ... -
Wanted: ZX81 caseJust found my old Issue one ZX81, ULA type 8120 (no other markings on the chip). Looking for a case to put it in and hopefully restore to full worki…
... ROM as well with the floating point DIV bug, which whilst not ... on a socket is the Z80 and ROM, which kind of ... , datecode 8125
The point is a restoration job, a ... -
Did Sinclair pioneer 'tiny' computers?Most computers of the time were fairly large-ish The Atari 8-bit, the Apple II, The c64 looks at least twice the size of the rubber key speccy. Th…
... to more expensive machines (floating point basic, z80 cpu even in slow mode ... -
Resurrection of ZX SpectrumHello everyone. I recently emerged from my attic bearing my childrens 128k ZX Spectrum +2 with a bag of games etc. Like many before it hasn't seen…
... faulty. But as the Z80 CPU only has very simple ... routines that BASIC uses are floating point maths machine code routines that ... programmer(s) using the simple Z80 machine code instructions), any failure ... br />
Next, if the Z80 CPU is socketed, change this ... -
Tau Day<br>By popular demand (well, demand of one, which is highly popular in the sorts of things I do :D ), here is a small celebration of tau day, June 28…
... string to float than the z80 library does :P[/quote]
floating point type used for input, sin ... -
Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc. There is an interesting…
... works well on the z80 (it's natural to ... -bit float on the z80).[/quote]
I’ ... unlikely to require good floating point performance, so it would ... seem appropriate to allow extra floating point types. Of course, ... are slow on the z80, though I believe faster ... -
(Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…
[quote="Darkhog;52514"]
- Regular IF z80 equivalent. e.g. If A -
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... at some of the z80 follow ups this penalty ... it's slow on the z80, programmers take great care ... libsrc/_DEVELOPMENT/arch/zx/graphics/z80/asm_zx_pattern_fill.asm?revision=1. ... picture of memory at this point:
200 ;
201 ;+-----------------------+ ... -
What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…
... because of its aggressive price point and so no changes ... generator
- X80 Floating Point Maths Co-Processor
floating-point unit for Z80 based computers. It is ... screen modes using a Z80 DMA Z84C1008 running at ... -
Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... identical ROM.
NE Z80 - A Brazilian clone of the ... mode, equipped with 8Kb ROM (floating-point support) and 1Kb of RAM ... -
Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... ROM.
NE Z80 - A Brazilian clone of the ... , equipped with 8Kb ROM (floating-point support) and 1Kb of RAM ... "Cientifico" (Scientific), a reference to floating-point support that wasn't available ... (0.9 Kg) portable Z80-based computer with built-in ... -
Every Adult Can CodeI would like to request for a new section in the Every Adult can code category for C/C++. This is aimed for the users of the Z88DK. Thanks Andy …
... sccz80. sccz80 also has better floating point precision and can sometimes generate ... /> We have to support any z80 machine and we have to ... -
Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…
... that need to use the Floating Point Calculator, such as [url="https ... commands really depend on the Floating Point Calculator? If it's only ... some support routines in plain Z80 machine code, the 'proper' entry ... -
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 …
... , it's not just the floating point multiply, it's also the ... for machines based on the Z80 if you add a Z180 ... -
Speed of variables vs. POKE/PEEKGreetings, I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew …
... , and we don't need floating-point/large numbers, wouldn't it ... -
FP Calc QuestionWhen using the FP Calc (RST 28h) to perform a subtraction how do you find out what the sign of the result is? ie. +/-. For example if I stack two va…
... place the values on as floating point numbers?
Derek -
Print Int -65536Just came across an interesting bug in the ZX Spectrum Floating Point format from the Complete ROM Disassembly book. [code] PRINT INT -65536 [/code]…
... bug in the ZX Spectrum Floating Point format from the Complete ROM ... -
ANNOUNCE: BASin r14 is up. New SCREEN$ paintbox included.Hi all, Well, I can't sit on this any longer - so I've released it. Let's all get a good testing session going, eh? You can get the new BASin [url=…
... in the 5-byte -> Floating point conversion routine which caused all ... -
ForthTrying to search for FORTH programs and FORTH articles within the forum is proving to be a complete nightmare!! If I search for FORTH in Infoseek I …
... programs were released which supported floating-point arithmetic!
I then ... -
SpecBAS 0.646 now available.Yay! Here's another round of bugfixes and additions to the Program. Not so much of the extract coding features, but more back-to-basics this time: […
... and FCHR$ for working with floating point values in strings.
Editor ... command - both for reading/writing floating point values (bytes in size) from ... -
Structure of numeric arraysHi all, I have saved from my spectrum a numeric array using 'SAVE "array" DATA a()'. I now have the resulting file on my PC and I am trying to get …
... stored as a 5 byte floating point number, but thats where I ... have tried to read about floating point numbers and binary fractions on ... -
problem with RND (or maybe INT)I'm using this statement: LET m=(INT (RND*sn)+k1)*k2-k1 to give a pointer m to a 2-byte segment of a string l$. Items k1 & k2 are integer constants…
... there's some problem with floating point evaluation. Any suggestions on how ... -
BASin bug?Every now n then I'm getting "invalid floating point operation" when trying to load up BASIC programs....it then locks up BASin But I can get r…
... 'm getting
"invalid floating point operation"
when trying ...
