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Barleywood Z80 Simulator LicenceHi All, Does anybody know if it is still possible to get a Licence for this Simulator? The reason I ask is that I'm currently using it to develop a…
... a view of memory, registers, stack etc on display along side ... and watch what happens on screen while you see exactly what ... -
Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
... /utility completely placed in screen memory including stack. how would you clasified ... -
Lord Of The Rings; Files skipped ?Hi folks, Does anyone know what blocks 8~13 are for in the Lord of The Rings: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0006601[/url] I…
... )
61454 LD SP,24064 (stack entries below this, program to ... ... 61482 load a screen (block 7) into ...er... screen
61483 ... 61492 ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... ' appear and the freewheeling Z80 stack passes by the screen addresses. -
128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…
... of multicolour on a screen.
Setting stack manually (ld sp ... pushing/popping values to the screen)
Again, I don ... change bottom part of the screen first, I don't know ... -
128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…
... This is a standard spectrum screen, converted by lcd's bmp2scr ... /> This is the same screen, converted using 8x1 multicolour floyd ... parts separate enough to change stack pointer. I never selected ... mask is overlayed on standard screen.
so, timing ... -
128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…
... This is a standard spectrum screen, converted by lcd's bmp2scr ... /> This is the same screen, converted using 8x1 multicolour floyd ... parts separate enough to change stack pointer. I never selected ... mask is overlayed on standard screen.
so, timing ... -
128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…
... This is a standard spectrum screen, converted by lcd's bmp2scr ... /> This is the same screen, converted using 8x1 multicolour floyd ... parts separate enough to change stack pointer. I never selected ... mask is overlayed on standard screen.
so, timing ... -
128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…
... to (i.e. move the stack pointer) that's another LD ... every time you relocate the stack pointer, you lose another 2 ... and right edges of the screen, is each line has slightly ... be as long as the screen memory itself and custom-written ... -
tiny routine to shift RAMTOP & stackCompressing some data areas above RAMTOP and wanting to make the released space available for BASIC arrays, I needed to move RAMTOP without using CLE…
... SUB stack (and it doesn't clear the screen either ... ; 249 ;from m/c stack
INC HL ; 35 ... ; 35 ;old GOSUB stack "00 3E"
INC ... 237 184 ;copy old GOSUB stack
INC HL ; 35 ... -
New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
[QUOTE=Dunny;579193]I shall pop an archive of demo programs up for you. Here you go:
[url]https://sites.google.com/site/pauldunn/demos.zip[/url]
Unpack that into your Specbas folder.[/QUOTE]
Thanks mate. Although now ... -
Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
Thats one massssssssive interput sticking all that stack onto the screen to do the graphics. Nice handler. -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... the current PC to the stack and then jumps to $0038 ... block patterns are passing the screen at regular intervals of some ... continuous growing (downwards) of the stack with identical values. IMHO. -
Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
... number were on the calculator stack. (That slightly longer version ... br />
[code]
;stack function parameters passed from BASIC ... "PRINT USR to calculator stack" method of passing parameters ... call:
PRINT USR stack,arg1[,arg2...,argn],address;
Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
... number were on the calculator stack. (That slightly longer version ... br />
[code]
;stack function parameters passed from BASIC ... "PRINT USR to calculator stack" method of passing parameters ... call:
PRINT USR stack,arg1[,arg2...,argn],address;
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... and can avoid using the stack for a while, you ... can point the stack pointer into your data and ... registers. Then point the stack pointer at the end of ... your sprites straight onto the screen, and try and get ... than copying from a back-screen.
Or ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... and can avoid using the stack for a while, you ... can point the stack pointer into your data and ... registers. Then point the stack pointer at the end of ... your sprites straight onto the screen, and try and get ... than copying from a back-screen.
Or ...Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
... a sprite walking on the screen at first... I'll be ... tstates
- to mess with stack location
- to use IY ...z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... , I'm working on a screen-painting/curses library, [url=http ... the Spectranet and its VFS stack, with a FHS-shaped root ...Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... LDIR instruction to move the screen buffer from memory to where ... avoids any problems with the screen refresh that occurs every fiftieth ... /> Now I thought I understood screen flicker issues, but I don ... use the stack. Using PUSH to write into the screen is faster ...Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... ; save all registers and the stack pointer
push bc
screen
ld hl, $ + 9 ; set return location (no stack available ... />
ld sp, (sp_cache) ; resotre stack pointer and all registers
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... this routine for dumping the screen (in this case a ... br /> LD (STACK),SP ;DUMPS VIRTUAL SCREEN IN REAL SCREEN
LD SP ... OF DIRECTIONS OF SCREEN
;USES THE STACK FOR MOVE THE ... HL,$E900 ;START OF VIRTUAL SCREEN
VOLC2 POP DE ...Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
... at the expected position in screen. Something silly must go wrong ... kept an eye on machine stack.Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... ]putting 2 bytes in the screen with LDI it takes 32 ... a looped version using the stack, but it was about 15 ... you can use an unrolled stack version that is around 20 ... it only requires a single stack change for each of the ...Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
...
[CODE]
LD (STACK+1),SP
SCREEN
LD (STACK1),HL ... , VOLFU;going to new screen segment, if e.g ... we are in the same screen segment
... NZ, VOCAF
STACK LD SP,0
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... at the edges of the screen. But that's only viable ... loops and use pre-calculated stack pointer settings (eating up a ...Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... if there was a looped stack solution that could challenge the ... big difference when copying to screen. thats where you get real ...Spectaculator and New Zealand Story 48k not loadingI cannot get New Zealand Story to load... The game menu section loads fine but then the tape emulator keeps looping on the booting tone and no progre…
... space then when it would stack, go to the VIEW menu ... the right, top of the screen
It'll now ...Spectaculator and New Zealand Story 48k not loadingI cannot get New Zealand Story to load... The game menu section loads fine but then the tape emulator keeps looping on the booting tone and no progre…
... space then when it would stack, go to the VIEW menu ... the right, top of the screen
It'll now ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... some messing about with the stack and a hop or two ... game entry point and SAVE SCREEN$!
