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SpecEmu 2.1 betaFinally I think I've cracked all the gory contention details required by those trendy multicolour demos (48K/128K modes only, +3 contention can wait …
... memory so as all its bytes are located in the starting ... from 7FFE, so it occupies bytes 7FFE, 7FFF, 8000 and 8001 ... from all the docs, first two bytes should be fetched taking into ... account memory contension, but another two bytes are located in non-contendable ... -
+D/Disciple games archive?Hi all, Having finally got my disciple to work, I'm starting to have a look at hacking multiload games. Is there any archive on the web with games t…
... "nopd" instruction is executed (the two bytes $ed,$fb). On a real ... disk RAM. This takes 6 bytes, replacing the 2-byte NOPD ... (eg, Spectaculator has a find bytes option as does Warajevo) then ... -
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... ;table with preshifted mask bytes for left and right sides ... a suitable part of preshifted bytes...
LD DE,(SCRADR) ; ... page
* Requires 512 bytes (although 128 are not used ... * When shifted each byte takes two bytes
* The table is divided ... -
Anyone know the address mappings...of the hardware resources on the speccy; From the screen display address range to all the hardware control registers. etc. Where can I get access t…
... beginning at 64000.
10 bytes are alocated for each sprite ... set if ON
next two bytes are X and Y.
bytes for each sprite
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... beginning at 64000.
10 bytes are alocated for each sprite ... set if ON
next two bytes are X and Y.
bytes for each sprite
Speccy vs C64 loading screen artHi everybody, Don't know if someone post this before, but i never see it and was just nice to appreciate. Check this: [url="http://www.lemon64.com/…
... 's a about 26 bytes short of 65K if ... (which is nybbles rather than bytes).[/quote]
YM ... -- the CBM64 had 65536 bytes of memory (64*2^10 ... full K, the other two bytes in that 26 i mentioned ... are the first two bytes of memory; 65534 bytes plus 1000 is ...About z88dk and autoexecsThis weekend I was playing a little with z88dk C cross Compiler. Amazing tool! I have three questions: 1- Does anybody know how to change the initia…
... , and before that is 2 bytes per parameter, right to left ... . The pushed parameter is always two bytes, but the unsigned char is ...InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…
... 't have even value low bytes then you'll possibly end ... looking in your table between two other addresses. Hence the idea ... byte and you're reading two bytes in then it's possible ... A000 A100 - which is 257 bytes.InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…
... I*256+255 inclusive (256 bytes).
On the Spectrum ... table must actually be 257 bytes in size.
If ... would only need to store two bytes in the table (at I ... a PIO chip which uses two im2 vectors; the MB02 interface ...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…
... data bus so only the two bytes were required to hold $FF ...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…
... to binary, and took the two bytes apart and converted them seperatly ...DocumentationI'm sure someone has already answered this, but I'm new to these forums. Could someone provide me with documentation about how data is stored in ZX …
... such that XORing all the bytes together in the block ( ... at the right)
* Two bytes for the length of the ... the flag and checkbittoggle bytes) (LSB).
* Two bytes for "Parameter 1" ( ... on type of block.
* Two bytes for "Parameter 2" (LSB). ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... hassle. The original ULA fetches two bytes per memory access cycle. In ... any timing. I do believe two different people looking at an ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... hassle. The original ULA fetches two bytes per memory access cycle. In ... any timing. I do believe two different people looking at an ... of four colours - still 2 bytes per row of 8 pixels ...Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... the value from the two least siginificant bytes of the 3-byte ... than just using the lowest two bytes of frames.
Then ...Timex 80 column display driverI subsequently wrote an 80 column font driver for 512x192 mode.
... br /> and 3 ; keep rightmost two pixels
or (hl) ; ... rla
rl c ; ca = two bytes to write to (ix),(hl ... rla
rl c ; ca = two bytes to write to (ix),(hl ...Games that could do with running faster, without affecting the timer, the music or the controlsRegarding the topic on the emulation forum, what Spectrum games do you think would benefit from a speed boost? Nowadays, most of us play Spectrum gam…
... be hacked to contain the two bytes or so for each instruction ...Checksum RoutinesHi there everybody, Does anyone have an 'off the shelf' assembler routine for generating checksums? Thanks Jim
... to by HL with BC bytes.
[code]
checksumsub ... , or at least the lowest two bytes of it.
ret
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…
... the string "A$" in the two bytes pointed to by CH ADD ...ZXLFN - storing tape header in a long file nameHi lads ;) Couple of months ago, the group of guys interested in divIDE software development has came up with an interesting idea - store tape heade…
... that for prepending few bytes to the beginning of ... Only if those extra few bytes push it over a ... unreadable.[/QUOTE]
Two points:
1) ... a grand total of two bytes, which are vaguely human ... in zero-padded decimal (5 bytes), \n
0x0e ...Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
But NEG takes two bytes same as CPL+INC A :)Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
[quote=Woody]But NEG takes two bytes same as CPL+INC A :)[/quote]
Tsk, what does Jonathan Cauldwell know about programming... :lol:Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
[QUOTE=Woody]But NEG takes two bytes same as CPL+INC A :)[/QUOTE]
You're right, it does. For some reason I had it in my head that it was one byte.
Ignore everything I just said.Graphics in Basic??What is the fastest way to draw high rez graphics in Basic. Andrew.
... is 23606/23607. It's two bytes because it stores an address ... 96 characters, which is 768 bytes.
All text produced ...Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…
... 8x8 bitmap block, all 8 bytes of the block share the ... usual four (two bytes of bitmap address followed by two bytes of attribute address ... . Eventually, solid block of 6912 bytes (albeit non-linear) was considered ...Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…
... usual four (two bytes of bitmap address followed by two bytes of attribute address ... byte atribute is for 8 bytes bitmap following scheme would require ...Multiple loading screens[i]Action Biker[/i] suffers from having to endure multiple loading screens. Any other games that have this annoying "feature"?
... -cell, to get more than two colours per 1x8 cell?[/QUOTE ... definitely not. The ULA fetches two bytes to display each 8 pixels ... have to fetch more than two bytes.Multiple loading screens[i]Action Biker[/i] suffers from having to endure multiple loading screens. Any other games that have this annoying "feature"?
... definitely not. The ULA fetches two bytes to display each 8 pixels ... have to fetch more than two bytes.[/QUOTE]
That makes sense ...Rst #38This, as far as I know, is the ROM procedure that does the keyboard check. (and, at the same time, is what's being executed by interrupt in IM 1 mode…
... HL,($5C7 ; Fetch the first two bytes at FRAMES1.
INC HL ... ; Increment lowest two bytes of counter.
LD ($5C7 ...
