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About how z88dk generates code and makes room for variables.When you attempt to code games for the 128K models using z88dk in C you need to somewhat control where variables are stored in memory. I thought tha…
... somewhat control where variables are stored in memory.
... some reason, when a variable is of a 16 ... assign values to each variable, this is, for ... 8 bits variables) are stored in $5EF1 and $5EF2, which ... created above $C000 I'm in trouble.
... -
SpecBAS 0.830 Released!Hi guys - A new official release of SpecBAS has been released. The full changelog is below, but for now here's the download: [url]https://sites.goo…
... to be. Now, UDGs are stored in ASCII positions 128 to 255 ... 35 times without needing a variable to keep count
...
32bit display target, in preparation for 32bit graphic support ... br /> Omitting a loop-control variable in FOR EACH caused the editor ... -
The history of ESXDOS, the DivMMC and the DivMMC EnJOY![img]http://benophetinternet.nl/hobby/divmmc_history/1%20esxdos.jpg[/img] These are the stories behind esxDOS, the most popular operating system e…
... ZX Spectrum which are stored in a ROM chip, to ... /> --------------------------
ROM and RAM in More Detail
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... another to select
pointer in .tap (POINT?)
... the $3dxx (TR-DOS) area, I thought - this is ... -
Turning .src files in z80 source code into .tap files.Does anyone know how I might go about turning z80 source code in 5 .src files into a .tap or .tzx file so that I can play it into my Spectrum +3? …
... about turning z80 source code in 5 .src files into a ... don't really have skills in this area.
I tried ... -
Data-Assette ZX-99 Tape Control System - Very Rare Untested - Sinclair ZX-81Data-Assette ZX-99 : : RARE : THE ZX-99 is a control system for up to four different tape recorders which also has an RS232 tape interface for ru…
... stored in a 2K ROM between 8K and 10K but the total area ... -
Screen address of PRINT position...Hi Folks, The following code uses DF CC system variable to extrac the screen address for a PRINT position. [code]100 CLS 110 PRINT AT 10,16;…
... code uses DF CC system variable to extrac the screen address ... ? Am I misunderstanding what is stored in the sysvar or is it ... a bug in BasinC?
Many thanks ... -
Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…
... /mccalc.zip
In both instances the required return ... calls. Refer to the "Strings" section in my compendium at:
< ... I use. The 'tint' variable indicates whether timings are to ... into programs and timings tested in situ with everything almost ... -
High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... HL ; ...and store them in TEMP
... TEMP) ; copy in HL the address stored in TEMP
... LD (HL),A ; the character present in A is stored ... A,2 ; upper screen area
CALL 5633 ; ... -
The Generality of how to Preserve Software "in the round" . Software sellers are now citing their use of "air tight " boxes etc - so we know that an effort is now being made to preserve . But these (often "R…
... long the software has "lived in this luxury"
... the whole thing it covered in dust .
When ... for each specific case . In Museums they have graduates specially ... cassettes can be stored in the limited space available in the airtight ... -
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…
... Double registers are two bytes in size and give an effective ... of a pair of numbers stored in memory in decimal we need to ... write certain tricky parts handling strings (although they aren't that ... (as the floating point stuff in machine code would confound you ... -
My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... being normally resident in that area).
In addtion pages 4 ... - if reset EPROM is in place, else ports 7FFD and ... which portion of RAM00 is in place.
It ... slide' in from the top of memory, with a variable starting ... -
Z80 to TZX Converter !Hey Everyone ! I have a bit of time lately and I coded a little utility that can convert the Z80 snapshot (any version, 48k and 128k supported) to T…
... just had to move some variable declarations outside of the "for ... it if you used that variable later, I think it decided ... thats because the loader is stored in screen RAM or something, and ... -
Clone Project feedbackFinally i now have some time to start again with my clone project. I have decided to drop the 48k project and go directly on a 128k clone. This migh…
... to add extra grapich modes in the future. And memory is ... and slow down the Z80 in video area access, only for compatibility ... MHz (I tested with a variable frequency generator). For greater speed ... HL or smth instructions in video memory area).
If ... -
Need some help making a BASIC gameI'm creating a text adventure in 128 BASIC (I don't like using the 'keywords' in 48 BASIC - It's slow and annoying!) called "The Legend of The Red Dr…
... br />
PRINT """This is in quotes"""
[quote]< ... problems including multiple action descriptions. In many text adventure games, ... . A player could type in something like "pick up ... a command, it is stored in a variable. If the command matches ... -
Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... dramatic. The components were disposed in a different way, nothing ... a clone. The BIOS was stored in a 16 Kb EPROM (model ... unused (the EPROM is mapped in that area). The RAM refresh is ... the only difference consisting in having the messages in Spanish.
how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …
... value of it is stored in a system variable (=23560), which you reset ...how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …
... value of it is stored in a system variable (=23560), which you reset ...128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... should be in an area which is ... then the system variable at 5B5Ch (23388 ... these pages may be switched in.
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...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... individual char cell to another area of screen completely. A simple ... is having the main game area managed by the sprite engine ... colour definitions have to be stored in row-major order. When the ... by choosing a smaller active area. I already have one eye ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... memory 9*SP1V_DISPWIDTH*SP1V_DISPHEIGHT bytes in size. This is where ... for each character cell is stored.
Whatever display ... sp1's display area. sp1's display area must lie entirely ... tiles are drawn, the tile stored in the "struct sp1_update" is ...Background image with SP1 and Z88DKWhat is the prefered way to place an entire (or very large) image in the background when using SP1? Should I convert it to a long (32*24=768 ) list o…
... will come from the address stored in the struct_sp1_update.screen + an offset ... the value of a new variable, SP1V_BACKBUFF, when SP1 is compiled ... If you store the screen$ in full (6912 bytes with attr ... thing even moreso when writing in C since compiled C code ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... by a new variable, but is instead stored in the tile array ... come from a screen$ stored in memory. This screen$ is ... the display file address stored in the character's struct_sp1_update. ... screen + the offset stored in the tile array. The ...MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... , but at least the viewable area is only 160x144.
stored in a table.
The original ... replaced by a RST.
In the 'ROM' the RST will ...Calling ROM routinesFirstly, sorry if this is the wrong forum to post this in, but I wasn?t quite sure under which heading is best fitted. I?m trying to figure out how…
... to discover where a variable is stored in the variable table (as detailed here ... />
Take a quick look in the [URL="http://z88dk.cvs ... machine code / C.
In particular I think [URL="http ...In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…
... - or min-heap (sorting in ascending or descending order) and ... such as integers, pointers to strings, etc.
Heapsort ... the array will be sorted in either ascending or descending ... and no recursive information is stored in the stack. Quicksort (even ...Was learning machine code a waste of time?I remember computer magazines from the mid-1980s often had features about using machine code, which I duly skipped over as it seemed totally impenetr…
... the meaning of apparently random strings of numbers and letters wasted ... of embedded devices -- in your car, in your microwave, in your dvd player ... subgroup of embedded applications -- in this area individual processes have to be ...Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... the second display file is stored using the tile array for ... file and the screen address stored in the struct_sp1_update for the char ... colours for a sprite are stored. sp1_PutSprClr() is used within the ... which will cause a rectangular area of chars or a list ...basizx newsHello. I've uploaded a new version of basizx. Now there is also an Amstrad CPC incarnation, able to LOAD and SAVE +3 basic files in disc. And the I…
... a way to acommodate them in the memory without disturbing other ... /> The line pointers are IN the code itself. Instead of ... then search)
The variable indexes *would* need additional RAM ... and it would probably sit in the area for variables. This is ...basizx newsHello. I've uploaded a new version of basizx. Now there is also an Amstrad CPC incarnation, able to LOAD and SAVE +3 basic files in disc. And the I…
... of the ROM, the comments in the published disassembies confirms it ... bit prefix and end of variable area mark, several things requires that ...Death of the Computer Science DepartmentRead this article on the death of the computer science department in universities by Neil McBride from De Montfort. It makes very interesting (and wo…
... the amount of data being stored. In order to access any random ... . The larger be area, the longer it takes in the worst case ...
