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Reading DEFB for backgroundsHi all I suppose the question is kind of silly but I'm a completely newbie with assembler :-S I'm drawing some side backgrounds with ZX Paintbrus…
...
ld (hl),a ; write to screen
inc hl ; next character ... /> ld a,l ; move back to start of line
sub ... -
Reading DEFB for backgroundsHi all I suppose the question is kind of silly but I'm a completely newbie with assembler :-S I'm drawing some side backgrounds with ZX Paintbrus…
... of code. Attribute address to screen address, and screen address to attribute address.
Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... = aS -> copy to local variable
; - ...
; calculate pointer to screen, yofs from table
... /> ; "or" the pixels to screen
ld a,(hl)< ... bc ; move forward in screen
ld a,(bc ...Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... quote]
You have to be very careful using ... BASIC to compare different machines. ... do all the text printing to screen, graphics and sound). ... Compare this to the ZX Spectrum 16k ... did the bare minimum to port over ZX Spectrum ...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... it's a bit wasteful to have two buffers, but clearing ... the other gives me something to do in the top-border ... the interrupt and the copy-to-screen.
I'm ... you've listed is going to be quicker than POP ... it going to copy 2/3 of the screen ahead of ...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... it's a bit wasteful to have two buffers, but ... the other gives me something to do in the top- ... the interrupt and the copy-to-screen.[/quote]
With a ... it going to copy 2/3 of the screen ahead of ... time from "ld ix,copy_addr_table" to the next op after "jp ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... alternate loading screen
-m dump banks and compression to binary files ... which just so happens to be the loading screen. Some however don ... have the option to replace it with another compressed screen with the ...50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... level code to push these to the screen.
... ; Load screen address to push to
; Self modified push to screen
... buffer: defs 15 ;
;
ld hl,sp ; Move to ... (spstore2),hl ; Store last screen positon
jp fl_bus ; ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... is it correct to assume it's possible to change the Spectrum ... interrupt driven routine that syncs to screen refresh, then use t-states ... to estimate position of beam, etc? ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... interrupt driven routine that syncs to screen refresh, then use t-states ... the 128K models due to having 2 separate screen buffers; just use ... not possible to use the full width of the screen in 8x1 ... width of the screen.
Overall it is, to a good ...How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…
... ray, send the whole bitmap to screen when the timer ticks. You ... instruction either - only those writing to screen behind the ray. In this ... case, fill the bitmap to the current ray position from ...How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…
... ray, send the whole bitmap to screen when the timer ticks. You ... instruction either - only those writing to screen behind the ray. In this ... case, fill the bitmap to the current ray position from ... . It is what I needed to understand drawing, and, partially -- ...How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…
... ray, send the whole bitmap to screen when the timer ticks. ... instruction either - only those writing to screen behind the ray. In this ... . It is what I needed to understand drawing, and, partially -- ... This is usually good enough to get a reasonable response. And ...Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …
... was Ultimate's...um...homage to it :) I also remember being ... being a Jetpac straight-to-screen method over to a dirty chars backbuffer ...Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …
... being a Jetpac straight-to-screen method over to a dirty chars backbuffer ...Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …
... being a Jetpac straight-to-screen method over to a dirty chars backbuffer ... . It's not an attempt to emulate some sort of 'exotic ...Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …
... being a Jetpac straight-to-screen method over to a dirty chars backbuffer ... . It's not an attempt to emulate some sort of 'exotic ... a bit of getting used to with keys but it's ...Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …
... was Ultimate's...um...homage to it :) I also remember being ... being a Jetpac straight-to-screen method over to a dirty chars backbuffer ...Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …
... , how are you going to handle multicolour rendering screens? ... /> The idea is to:
1) detect screen writes, and border ... on the 69888 tick, copy to screen, and sync with the ... has hit some part of screen this way). But so ... is still rocket science to me.Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …
... how are you going to handle multicolour rendering screens ... The idea is to:
1) detect screen writes, and ... the 69888 tick, copy to screen, and sync with ... hit some part of screen this way). But ... unsupported ports. So while screen generation is occurring, ...Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …
... on the 69888 tick, copy to screen, and sync with the real ... ]
Are you going to emulate 48K only?
DisassembliesHi, Long time lurker ... even longer Speccy user/prgrammer ... sorry if this is in wrong topic - don't shout too loudly! ;-) I rather like disa…
... would have a look. Impressive! To get the hang of it ... and 7K of that gone to screen the remaining 9K would be ... an easier target to get started with.
to get going and I hit ...How to store and recall a "window"?I would like to memorize and then restore a rectangular portion of a screen, pixels and attributes. To make things easier, this "window" would be sit…
... /discussion/56595/zy10-a-tool-to-store-and-display-some-small ... graphics. (I'll leave you to understand what it does, and ... />
; ============
; Copying data to screen
ld de, 16392 ...ZX Spectrum EmulatorsI'm putting together a (hopefully) comprehensive list of all ZX Spectrum emulators available for the new WoS site. Obviously we'd like the latest …
... the first byte drawn to screen is from 16400 instead of ... . It may be used to have a double buffer ... is already cramped without having to reserve another 6912 bytes) ...
That is not related to ROM but CRTC (in this ... the banking register to do double buffer).ZX Spectrum EmulatorsI'm putting together a (hopefully) comprehensive list of all ZX Spectrum emulators available for the new WoS site. Obviously we'd like the latest …
... the first byte drawn to screen is from 16400 instead ... already cramped without having to reserve another 6912 bytes) ... /> That is not related to ROM but CRTC (in this ... use the banking register to do double buffer).[/ ... In fact I said to polomint elsewhere that I ...ZX Spectrum EmulatorsI'm putting together a (hopefully) comprehensive list of all ZX Spectrum emulators available for the new WoS site. Obviously we'd like the latest …
... the first byte drawn to screen is from 16400 instead ... already cramped without having to reserve another 6912 bytes) ... /> That is not related to ROM but CRTC (in this ... use the banking register to do double buffer).[/ ... In fact I said to polomint elsewhere that I ...ZX Spectrum EmulatorsI'm putting together a (hopefully) comprehensive list of all ZX Spectrum emulators available for the new WoS site. Obviously we'd like the latest …
... so the first byte drawn to screen is from 16400 instead of ... is already cramped without having to reserve another 6912 bytes) or ... and use the banking register to do double buffer).[/quote]< ... />
How dare you speak to me !!!!!![/quote]
Somebody has ...
