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+3 how to detect if a file exist ?Need help. I am making a generic menu to my compilations over the spectrum +3. Exist some way programatically to detect if some file exists on the d…
... that the program dissappears from memory :smile:
... : READ p: POKE a,p: NEXT a
30 DATA 243 ... 159,251
31 DATA 6,3,14,5,22 ... 144,201
35 DATA 243,237,115,0,144 ... 159,251
36 DATA 6,3,205,9,1 ...
37 DATA 1,253,127,58,92 ... -
Building a menu in ASMWEll as probably some figured, i am learning asm at least to make the basic menu i did in basic. It is a menu where we can select games to be loaded.…
... better to keep the menu data on disk rather than define ... fit into main memory, and they could be read in chunks - maybe ... loaded from RAMdisk into main memory when needed for selection. -
testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... calculate a CRC on is data - in other words, the ROM ... that the keyboard can be read, and that you see border ... given a fixed piece of data, regardless of how long it ... of indication even if screen memory is faulty (and therefore nothing ... -
zxs v0.2 releasedI have released v0.2 of zxs if anyone is interested, judging by the response to the first release, I'd say not, but I'm gonna do it anyway!. It has h…
... then:-
1. The PEEK dialog thinks address zero at ... . It's only that the PEEK dialog presets the "Address" field ... pull-up resistors on the data bus causes it to float ... when you do an IO read of nothingness. This needs work ... -
Howto paint a squared zone of the screen ?You know what guys ? i begin to love this languaje. Cant understand why not put more effort on the 80's to learn it :( because it is really speedy. …
... ' letter in the memory, and will have to read all the letters ... in a loop, until you read 0 (end of the string ... =USR ..
20 LET c=PEEK a
30 IF c ... -
Only 300MB ?I was watching the TV program Caprica, and one of the characters says to another "[I]The human brain can only store around 300 megabytes of informati…
... />
I did read somewhere that there are more ... />
And regarding memory, it's true that you ... and all sorts of data is stored in your mind ... the sum total of data there only 300MB, regardless ... agree that comparing human memory to computer storage is ... -
RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…
...
* 0x003B - Page A memory selector
* 0x013B - Page ... dec)
MEMORY PORT:
READ from port #85FD (34301 ... adressation):[/B]
MB02+ memory paging:
WRITE to ... )
As data collision protector is connect PROFI ... -
Spectrum + Mobile Phone = Internet?So nifty as Spectranet is I started thinking can this be done another way and I believe it can... [LIST=1] [*]Get one of [URL="http://www.chinavasio…
Winston's card has a buffer for data as well remember (on the interface).. which makes life easier / not dependant on the speccy memory from what I've read. -
Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... to make room in memory for the extra data needed, but it ... .
BTW, did I read somewhere that the Spectrum version ... -
Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…
... , and the buffer unpacked in memory), which might be too much ... work well if the unpacked data somehow overwrites the original HEX ... />
{Move the counters to read the next two chr$}
- When encoding the data, values from 0-256 (actually ... -
Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…
... and dumping them first in memory before BEEPing them... The ... to be longer than the data that Im poking into ... 2 LET A=5+PEEK 23635+256*PEEK 23636: LET J=1 ... /> 3 LET BYTE=16*PEEK (A-1+(J*2-1 ... ))+PEEK (A-1+(J*2))- ... STEP 2: BEEP PEEK (A+F)*MININ,PEEK (A+F+1 ... -
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... ' then read the system variable for the memory address, then PEEK that address ... -
Spectrum hangs upWhat might be problem when my ZX Spectrum 48K (rubber keys) hangs up after few minutes play? It had memory problems but i changed (or an expert did i…
... corrupts the data bus.
- A bad lower memory chip with ... =d TO d+10: READ a: POKE n,a: ... for possible failures in memory deconding, due to bad ... To test both lower memory and upper memory, use 32763 for ... testing lower memory, when testing lower memory you will ... -
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... actually POKEs the data in to screen memory to create the ... quite quickly and obviously the memory footprint is low.
... x=4: LET CHARS=PEEK 23606+256*PEEK 23607
250 ... y,x;: LET sa=PEEK 23684+256*PEEK 23685
360 ...
380 LET T=PEEK ca
390 IF ... -
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... 1 generates the chatacter set data as before and saves each ...
110 LET CHARS=PEEK 23606+256*PEEK 23607: LET CHARS=CHARS ... ;a
145 POKE DTOP,PEEK CHARS
150 LET DTOP ... +1
155 POKE DTOP,PEEK CHARS
160 LET DTOP ... -
storing level datahi everyone im using arrays to store level data. its not working. just to set up the walls takes an array of size 92*2 is there a better way?
... Robin,
If your data is numeric and there is ... PEEK/POKE. It does get a little more complex if your data ... a big saving in memory terms although the PEEK/POKE becomes more ... />
Another option if your data falls within 0-255 is ... -
Location of variableHi everyone When basic makes an array how to you find out the location in the ram of where the data is stored. :) Also, does it store the values in…
The Spectrum data structures are explained on ... and/or contents of any data type. Remember that numbers ... so manipulating them directly from memory in BASIC is a bit ... DEF FN p(a)=PEEK a+256*PEEK (a+1)
... )-2:
LET e=PEEK i:
IF e= ... -
SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…
... Also access to screen data is very easy from ... COUPE basic disable direct memory switching and testing from ... another sample without any memory paging, setting only the ... br /> in a,(254) ; read keyboard
cpl
... -
Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…
... the ability to sort data larger than memory.
As long as ... you have enough memory for the index array and ... have to constantly read from a random access data file to get ... provide fast random access to data. Linked lists and trees require ... -
zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…
... were needed for a certain memory size. If you use ... each connecting to the same data lines, it means many ... chips connected to those data lines, which isn't ... DRAM chip attached to each data line (and fewer pins ... system (ROM, CPU etc). Read: less of a problem.
Opinion on new 128K only gamesHello, Being new to the WOS community, I am unclear on the attitude towards 128K only software, that is; Is there a strong need to support the 48K m…
... to solve memory alignment issues, LONG, WORD, and BYTE data seperate, ... />
mov edx,[edi] ; Read destination
mul byte ... />
mov al,ch ; Read green
and ecx,000FF00FFh ...
mov al,dh ; Read green
and edx,000FF00FFh ...Loading BASIC programs stored as "bytes:"Hi all, I have a question regarding loading BASIC programs, that I managed to save as machine code (I suppose) when I was a child, as a result of e…
... use to read tape header & data blocks independently into memory, and it ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... />
; Read bytes from AUX port.
; ------------
data ld d,4 ; 38400 BAUD ... hl),a ; Write BYTE to memory
inc hl
data:
[code] < ... abcd ld a,(de) ; Read BYTE
inc de
The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …
... . It makes it easy to read code as you flick through ... />
The editor can only read MS-DOS format text files ... download to the full 48K memory map.
Auto detect at ... /> Download code section and/or data section to keep serial traffic ...The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …
... you cannot read/write words or longs to odd memory locations. The ... Memory Access) is used to transfer data to/from VRAM. A single memory ... port can also be used to transfer data to/ ... you wish to read/write and then read/write the data one word ...
