-
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... check from which address the RST call was made (the ... original code.
RST 0x28 code is floating point ... /> [/code]
New RST 0x28 will inject a jump ... /> call 0x04aa
jp 0x335b ; calculate in ROM
.db 0xff ... -
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
Here's the (untested) rst part and the bootstrapping in ... 19 bytes.
[u]RST code[/u]
[code]
call dbgboot
jp 0x335b ; calculate in ROM
[/code]
Corona Virus,Is is me or is the BBC sensationalizing this corona virus too much and creating hysteria?
... , i.e. stays constant in percentage terms?[/quote]
Take the ... resist using these figures to calculate percentages etc.
[quote ...This can (not) be true!Yesterday I programmed an entire spreadsheet in just 1 line of code (see also TOPIC ONELINERS). It can calculate formula's, use text and fieldvalues …
... also TOPIC ONELINERS). It can calculate formula's, use text and ...Hook CodesIf you've dug into the Interface 1 this should be an easy question. I last had 'em circa 1990 while I can remember the things they did Start Motor C…
... a program
Normally RST 8 handles exceptions eg
RST 08
DB 01 ;;produces " ... 2 Variable not found"
RST 08
DB 1A ;;produces ... error" (maybe, not certain)
RST 08
DB 1B ;;Starts ...ZX PC Interface : The manual, schematics and more info... ZX <-> PC Interface ------------------- Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…
... the ZX ROM.
RST 8 is also altered, but ... from 1997. You can make RST 8 to call to your ...ZX PC InterfaceZX <-> PC Interface Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Installation 2.1) The softwa…
... saving to tape.
RST 8 is also changed, but ... .
You now can make RST 8 to call to your ...Wanted Software to Swap for Rom Carts ;)Wot I have for grabs is 4 Complete ROM Carts which I will swap for my wants below Horace [url="http://www.cornishdavey.dsl.pipex.com/4.jpg"]http://w…
...
Logic Processor, The
Percentage
Star Reader
Towers ...identify another game...please...it`s a maze - there are 2 ships - one big and one small and you have to find the exit from a cave and you have to move, to push...all kind of objects…
... is that you have to calculate your every move because it ...InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... ), the processor simply executes an RST 38 instruction if an interrupt ... (0xff), coincidentally the opcode for RST 38, so the Z80 will ... executed; if there is a RST n on the data bus ...Program sizeI am typing a basic program into a ZX and I need to find out exactly how much memory it is using. Is there a way to calculate this? :confused:
I am typing a basic program into a ZX and I need to find out exactly how much memory it is using. Is there a way to calculate this?
:confused:Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
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…
...
ADD A,A ;then calculate displacement
ADD A,A ...Help required to calculate screen addressesDoes anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of …
Does anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of this.Copyright questionWhile I was browsing the net I came across a Japenese Retro site. On the emulators page was this disclaimer - "In Japan, it might contradict the l…
... any idea what sort of percentage of emulators are shipped from ...Ranking emulation on N-gageI'm very interest in the N-gage phone (first version, not QD), and the last decision in order to buy one it's the emulation issue. So, I need you t…
... , i think, it's ranking (percentage) the emulation on this platforms ...Er, a MILLION different ways?!?!In the UK recently, there have been adverts for a media player (I forget which) whose manufacturer is encouraging purchasers to use it in shuffle mod…
... combinations"; they were trying to calculate all possible ways of buying ...Map to screen address problemCan anyone help me out with what I guess is a screen address calculation problem. I need to calculate the screen address of a tile based on a number…
... .
I need to calculate the screen address of a ... tricky when I have to calculate for the other screen thirds ...PRINT AT in assembler Hello everyone, I am very new to this forums. Like perhaps many others I had a Spectrum as a child and did pretty much simple BASIC programming, bu…
... />
LD a,22
RST 16
LD a,10 ... (x-coord)
RST 16
LD a,20 ... (y-coord)
RST 16
LD a,65 ... (character code)
RST 16
I might ...The Retro Ball charity event - tickets now for saleTickets for the event are now on sale and can be purchased at : [url="http://www.play4charity.co.uk/ticketstimes.html"]http://www.play4charity.co.uk…
... are limited - remember a large percentage of ticket sales will be ...ZX Adveture Club thingy - game for first half of OctoberHello, Put down your rucksacks, lay down that torch, stop cussing the swamp and the ogres, our time playing [I]Monster[/I] has ended. How did you a…
... it? What was your final percentage?
And, whilst we ...MC TipPlace your MC tip here: Here is my first: When using alternate registers (EXX) the HL register must not be affected on return to BASIC. Also the IY…
... using ROM-routines (i.e. RST 16).
or return to ...http://zx.pk.ru RST#38 (Russian Spectrum Talks)[url="http://zx.pk.ru"]http://zx.pk.ru[/url] is a biggest Russian forum for Speccy (has 750 Registered Users & 30 000 Messages). It's live discussion…
[url="http://zx.pk.ru"]http://zx.pk.ru[/url] is a biggest Russian forum for Speccy (has 750 Registered Users & 30 000 Messages). It's live discussion about software, hardware (Russian clones), Emulation, latest releases on Speccy, and unique ...SPIN AssemblerAnybody got any idea why RST 10 doesn't work in SPIN's assembler?? Perhaps I'm putting the command in the wrong format. Cheers
Anybody got any idea why RST 10 doesn't work in SPIN's assembler??
Perhaps I'm putting the command in the wrong format.
CheersROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …
... ROM-0 will use a RST instruction (it doesn't matter ...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…
When using the FP Calc (RST 28h) to perform a subtraction ...
