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Another vertical scrolling questionwhile talking about w256 x h128 vertical scrolling, are 128k modes have any advantages over 48k models? has extra ram or swappable screen buffer any…
The swappable screen is useful because you can ... the new frame in the screen which isn't showing and ... , you either work directly in screen memory, risking to show a half ... the finished data to the screen memory. -
FUSE on OSXHello peeps, Long time no speak! I am trying to set up some emulators on my MacMini (launched via XBMC), and of course, Speccy emulation is a mus…
... emulators that dont have command line options i've cheated ... telling it to launch full-screen.
The basic ... line (or as default program)
- Open the emulator full-screen ... from command line (or by default)
FUSE on OSXHello peeps, Long time no speak! I am trying to set up some emulators on my MacMini (launched via XBMC), and of course, Speccy emulation is a mus…
... command line (or as default program)
- Open the emulator full-screen ... from command line (or by default)
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> ex de, hl ; location before next line's
add hl, de ... to HL
; THE 'NEXT-LINE' ROUTINE
org 0x1bd1
ld (nxtlin), hl ; set next line
ex de, hl ; swap ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> renum_3:
call next_one ; get next line address
inc hl ; point ... ; length
ld hl, (mem_2) ; next line
ld de, (mem_2_2) ; change ... /> call next_one ; get address of next line
ld hl, (mem_3_4) ; end ...128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
Yes, but you save the need of an off-screen buffer you have to copy to the screen memory.128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
[QUOTE=na_th_an;734560]Yes, but you save the need of an off-screen buffer you have to copy to the screen memory.[/QUOTE]
oh yeah thats trueFZX Driver for z88dkAn fzx library for z88dk can be downloaded [URL="https://drive.google.com/file/d/0B6XhJJ33xpOWM2hWNjAxMVkxaEk/edit?usp=sharing"]here[/URL]. The libr…
... work properly for setting screen coordinates, since line or column zero will ...Writing faster BASICIn terms of structuring BASIC programs, what are the best ways allocate variables, functions, arrays? Any tips. I remember INPUT mag had some suggest…
... assembled. I loaded a 700 line test file and assembled it ... rather than continuing with the next line. One that wasn't a ...128k gamesHi. I've come to World of Spectrum for advice. I'm a Commodore guy OK, please be nice to me, as I seek your wisdom! I love the Commodore 128, and I'…
... in place of the normal screen memory And on a Spectrum, you ... bank that ordinarily contains the screen. So again, when you want ... ) memory blocks, but with no way to write to either screen - those ... why developers used the 128K memory as little more than extra ...Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... messing with the code in line 1.
length: equ ...
begin: db 0,1 ; line number
dw length-4 ... ; line length
db $f9,$c0,' ...
db $0d ; end of line (no next line)
runusr: res ...Help a small machine code game.Hello all you clever wossers are there any GOOD?? games that are in machine code (no basic apart from the loader,rnd usr bit) but are very small ma…
Are you trying to learn machine code?
Putting bytes in screen memory and manipulating them is the best way to start.
I have never learnt by looking at other people's code strangely enough. I learnt by asking loads of questions.ZX memory questions1. what is the highest address in a 48k spectrum that can be written to? 2. can you write to an address less than 16384 (on real hardware) 3.48k...…
great thanks. :)
and
4. excluding the screen memory and attribute table how much free memory is available in a 48k machineZX memory questions1. what is the highest address in a 48k spectrum that can be written to? 2. can you write to an address less than 16384 (on real hardware) 3.48k...…
[QUOTE=ASH-II;750225]4. excluding the screen memory and attribute table how much free memory is available in a 48k machine[/QUOTE]
49152 - 6912 = 42240 bytesHow to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... text and move to next line etc until you run out ...how to load .SNAOk all, here is my problem. I have got the lead so I can run an external floppy drive unit as "B:" I have used the CPCdiskXP software program in Win…
... the first 14 bytes of screen memory. If this causes your SNA ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... than writing to screen memory, it pages the shadow screen in and then ...Scrolling Bi-Colour Engine for 4-Player GamesJust putting this code up for people to have a look at. Far from finished. Should simply compile and run a bit of a demo. Only good for 128K and +…
... points to the next line,
;and the last line points back to ...How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... . But if I was accessing screen memory I'd be doing LD ...How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... there.
Things like memory addresses though there is no ... /> Copying the main screen memory to the shadow screen in decimal vs in ... at all)
The memory space of the Z80 starts ...Mr Heli - my new mod (w.i.p.)I really liked modding Spectrum games and would like to share my new project with you :) I took arcade port Mr Heli. It is actually a good game with…
... the CPC version has a screen area clipped at 128x192 to ... 're considering the Speccy's screen memory layout; it's an odd ...Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... the stack pointer for the next pass. You can waste a ... a row to copy each line, rather than one LDIR.
next line.Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... the 128, always treating the screen memory as being at $C000.[/QUOTE ... over the Timex's shadow screen which is offset by 8K ...Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
[QUOTE=joefish;765527]What if you used both joystick inputs[/QUOTE]
Nope, the inputs are just parallel like keyboard rows. The only difference is the high memory address line (column).bytes bits balonyNever mind
... imagine that instead of the screen memory map being the way it ... , you've just rediscovered linear screen organization :)
Yes, ... graphics to some area of memory (which doesn't change ... really different organization than real screen, you just have to ...DIM and FOR, NEXT loopHi there. I'm making a program with 100 items on screen using dim and a for next loop. The thing is, each time I want to manipulate the items I do an…
... at the end of the screen memory to check where something is ...30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... that sp holds for the next line.
Numbers are T ... before ULA access of the line). These numbers are written for ...30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... that sp holds for the next line.[/QUOTE]
Ops! This ... is already set for the next iteration, within the same attribute ...bitmap vs tile based displayIf I understand it correctly the ZX Spectrum display is all about bitmap. On the other hand the Commodore 64 is not. Correct me if I am wrong. If I …
... /> The ordering of the Speccy screen memory and the attribute system, in ...
