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Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
... address 089F0h. The very last BYTE of the program is probably ... also see a possible terminator BYTE with the value 080h at ... -
PoC for a ULA video generator described using Handel-C and a Basys FPGA board.Recently, I've taken a course about hardware design for video processing using FPGA's. The HDL used in the course was Handel-C, a C look alike langua…
... FSM that first erases the attribute area, filling it with value ... -
Character Printing routines - 27/32 lines?There are lots of extra character-per-line routines out there for 42,51,64 even 85 characters. Are there any that do 7/6 pixel rows - and do 27 or 3…
... />
It means chucking the attribute grid in the bin, but ... -
Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
... and find the corresponding byte in the level data.
byte H
ld a, (ix ... a ; load it into low byte of HL
... now contain the data byte read from the level.< ... -
A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…
... 0' bit within the byte that is being transferred ... L) holds both the byte that is being outputted ... first, L holds the byte to transfer.
Then ... If ZF is set, the byte has already been trasferred. If ... ;Other stuff... load next byte and so on...
... -
Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…
... ) ;point hl at them, high byte first
ld l,(ix ... +0) ;low byte
ld (hl),a ;a ... address, is loaded with graphic byte from call goblin
inc ... return
inc hl ;next byte along
ld (point),hl ... -
PS3 now fully cracked and open?About a month back, a hacking group claimed that they'd discovered the PS3's 'key' algorithms, meaning that they can 'sign' any code. What this means…
... algorithm that considers every single byte of the program) and compares ... -
Strange DivIDE ScreenI've just got an SD card adaptor for my DivIDE and it does something strange. On startup, I can see the DivIDE logo and it registers the adaptor, bu…
Recursive 4-way floodfillHi guys) Shortly, I wanna find out whether there's a way to some object. Perhaps some of you have already encountered such an issue which is relativ…
... ]Procedure Fill(const x,y:byte);
begin
if CANCEL ...Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
65 vintage ZX Spectrum games[url]http://cgi.ebay.co.uk/65-vintage-ZX-Spectrum-games-/190500291093?pt=UK_VintageComputing_RL&hash=item2c5ab3c215[/url] Batman The Movie - Ocean D…
... Bluff - Micromega
Pool - Bug Byte
Tau Ceti - CRL
Turmoil - Bug Byte
Rapscallion - Bug Byte
NOMAD - Ocean ...Saving space...Hi Folks, Looking for ways to save some memory in a program I am writing. In a number of places I have the following code: [CODE]xxxx PAUSE 1: …
... /> [FONT="Courier New"]PAUSE = 1 byte
1 = 5 bytes
RANDOMIZE = 1 byte
USR = 1 byte
64564 = 5 ...Looking for a couple of games: Friday the 13th and After ShockAs per topic title. For F13th, I'm after for the Domark original, not the Bug-Byte re-release. Condition doesn't need to be mint or anything like th…
... Domark original, not the Bug-Byte re-release.
Condition ...Image To ZX Spec 1.3.0Image To ZX Spec 1.3.0 The 8x8 GigaScreen support is probably jumping the shark as other tools will do a better job but it was requested some time a…
... ).
- Added "Reduced Set Colours" attribute favouritism.
- Added drag and ...Moving to Oz, need to sell my stuff :(Let me know if you are interested in any of this or ALL of it. Hardware ? Spectrum + 3 including PSU(Keyboard works fine but can?t get the drive to …
... Trax - Mastertronic
Terramex - Bug Byte
That's The Spirit ...Pro Tennis Tour (missing credit)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0003891&loadpics=3"]Pro Tennis Tour[/URL] Original design by Blue Byte (middle left) [img]ht…
... />
Original design by Blue Byte (middle left)
[img ... "]Further wiki-info on Blue Byte.[/URL]Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
... cycles does let me grab attribute data as part of the ... I'm left hanging for attribute data.
I suppose ...Screen Viewer: Speccy View 4SpeccyView (v4.0) Here is my new zx spectrum screen viewer, result of this weekend's work. Features: Loads: -Standard Screen Files (6912 byte raw …
... :
-Standard Screen Files (6912 byte raw .scr)
-UlaPlus Screens ... . If game has a 6912 byte long block SV4 will pick ...few bits of firebirdfew bits of firebird , as I'm sorting my doubles by label.. maybe your missing a title or 2? I'll say 75p each, postage depends on if you buy more (…
... (new cover) / bounces / brainstorm / buccaneer / byte bitten / bombscare
cauldron ...Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... br /> ; create & plot byte 1
; *********************
and ... - combine with previous plot byte
ld (hl), ... 4t - back up for second byte
; ********************
; ... - combine with previous plot byte
ld (hl), ...Retro-X : RXA format?Hi! I've used Retro-X to convert a short AVI video into a RXA format anim file, using QL lowres mode (mode 8, 256x256). Peeking at the resulting file…
... that it has a 100 byte header with some unknown information ... , a whole number of 32768 byte chunks, so I guess it ... 32768 bytes (past the 100 byte header, that is, the first ... 6912 bytes past the 100 byte header and loaded into ZX ...writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... on "roms", read them byte by byte and interpret each value as ...The display of the ZX SpectrumI'm trying my hand at putting a simple emulator together, but I don't quite remember exactly how the screen works... I have a (void) function that ta…
... without the attributes) and the byte at that address. It returns ... , having rendered that byte onto the screen (in a ... 3, and within each consecutive byte is first row, then ninth ...Jet Set Willy II - collecting objectsThe POKE to reduce the number of objects you need to collect doesn't seem to work. [CODE]POKE 34686,1[/CODE] It looks correct. It changes the CP 150…
... the number of objects collected (byte at $5090) and makes a ...The attribute challengeThis did not work out as well as I'd hoped so I had to adjust a few later. Really I should of redone them all but tis only a bit of random fun. Basi…
This did not work out as well as I'd hoped so I had to adjust a few later. Really I should of redone them all but tis only a bit of random fun.
Basically, here's some loading screens from popular (?) games. I've removed the data and left just ...Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... transfer program? What is the byte order and what are the ...The attribute challenge (part two)I got a bit carried away this morning and did too many :oops: , so I've split them into two parts and only just had a bit of time to sit down and pos…
I got a bit carried away this morning and did too many :oops: , so I've split them into two parts and only just had a bit of time to sit down and post them. This although the first is the second as we had a topic on this yesterday. The final part although ...The attribute challenge final (part three)Last one :) , I was going to hold off but the pics are ready and the last one was solved in 20 minutes so... I've rotated (some but not all) of thes…
Last one :) , I was going to hold off but the pics are ready and the last one was solved in 20 minutes so...
I've rotated (some but not all) of these 180? to make them a bit more difficult although some are still easy.
1
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