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How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... writing etc)
SCREEN EQU $4000 ; Location of screen
ATTRIBS EQU ... ; attrib to set when clearing screen
cls:
di ;disable ...
push bc
call sprite8x8a
pop bc
pop hl
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... to an off screen buffer and copy that to screen if you ... /> ; next row, calculate screen address
pop hl
; move down ... l
inc hl
push hl
ld a, ( ... /> ; next row, calculate screen address
pop hl
; move down ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... to an off screen buffer and copy that to screen if you want ...
pop bc
ld de, shiftdata_lbuff
push bc
call sprite8x8caAlwaysLookupRow
pop bc
ld ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... ; push table address
push hl
; look up screen address ... ld h, (hl)
; copy this to HL but add ... ; next row, calculate screen address
pop hl
; move ... ; next row, calculate screen address
pop hl
; move ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... it back
; look up screen address from the table
; copy this to HL but add col onto it
push bc ... c
add c
pop bc
ld l, a ... c
add c
pop bc
ld l, a ... c
add c
pop bc
ld l, a ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... an off screen buffer and copy that to screen if you ... check_overlap_expanded expandamount
push hl
push de
ld ... /> .done
pop de
pop hl
ENDM
push bc
call line_data_alloc
pop bc
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... ld h, (hl)
; copy this to HL but add ... ; push table address
push hl
; look up screen address ... ; next row, calculate screen address
pop hl
; move ... ; next row, calculate screen address
pop hl
; move ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... it back
; look up screen address from the table
; copy this to HL but add col onto it
push bc ... c
add c
pop bc
ld l, a ... c
add c
pop bc
ld l, a ... c
add c
pop bc
ld l, a ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
pop bc
djnz .nextbyte
xor a
push bc ... /> ld a, c
; copy HL into BC
ld ... ; erase last char written to screen
unputc:
ld hl ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
pop bc
djnz .nextbyte
xor a
push bc ... /> ld a, c
; copy HL into BC
ld ... ; erase last char written to screen
unputc:
ld hl ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... I'll have to copy strings to a temp ...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
pop bc
ENDM
MACRO LD_SCROLL_N_SRC_DEST_LINE offset, nlines
push ... ld a, c
; copy HL into BC
ld ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
ld a, c
; copy HL into BC
ld ... ; erase last char written to screen
unputc:
ld ... , hl
push bc
call parseint16
pop bc
...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ; base address of the screen
SCRBUF_BASEADDR EQU #4000< ... pop bc
ENDM
MACRO LD_SCROLL_N_SRC_DEST_LINE offset, nlines
push ... a, c
; copy HL into BC
... erase last char written to screen
unputc:
...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ; base address of the screen
SCRBUF_BASEADDR EQU #4000
pop bc
ENDM
MACRO LD_SCROLL_N_SRC_DEST_LINE offset, nlines
push ... buffers to fill rather than copy
ld bc, ... a, c
; copy HL into BC
ld ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... />
; base address of the screen
SCRBUF_BASEADDR EQU #4000
copy
ld bc, 256 * 24 ...
ld a, c
; copy HL into BC
ld ... /> ex de, hl
pop de
push hl ; we will return ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... br />
MACRO LD_SCROLL_SRC_DEST
push bc
ld a, (bc ... /> pop bc
ENDM
main:
; clear the screen
copy
ld bc, 256 * ... br /> ld a, c
; copy HL into BC
ld ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... br />
MACRO LD_SCROLL_SRC_DEST
push bc
ld a, (bc ... /> pop bc
ENDM
main:
; clear the screen
copy
ld bc, 256 * ... br /> ld a, c
; copy HL into BC
ld ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
copy
ld bc, 256 ... /> pop hl ; next token
pop bc ; depth
push de ; push our ...
; we want to copy bc bytes from pushed value ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
; base address of the screen
SCRBUF_BASEADDR EQU #4000
copy
ld bc, 256 ... /> pop hl ; next token
pop bc ; depth
push de ; push our ...
; we want to copy bc bytes from pushed value ...Quiz - my first attempt!And so it is! My first attempt at a quiz... 1. All answers give 1 point unless otherwise stated, for a total of 33 points. 2. Give your answers excl…
... same game?
13. Push your enemies off a platform ... ) Spanish game featuring an Italian pop singer.
15. In ... the Guardian in the last screen.
23. Which was ... one appearing on the loading screen.
28. Among the ...IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…
... and use HALT to sync screen drawing (dumping of offscreen graphics ... , one with IM2 for synchronizing screen manipulation (a scrolling text) using ... /> push hl
ld hl,16384
inc (hl)
pop hl ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... br />
Spriteloop:
PUSH BC
CALL ... IX,DE
POP BC
DJNZ ... On Entry:
; HL Contains Screen Address
; DE Contains Char ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... PUSH AF
PUSH BC
PUSH HL
PUSH IX ... /> POP IX
POP HL
POP BC
POP AF ... :
; HL Contains Screen Address
; DE ...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... CALL WRITECHAR
POP DE
POP BC
DJNZ ... br /> POP IX
POP HL
POP BC
POP AF
PUSH HL
; CONVERTS A SCREEN ADDRESS TO ...Help needed to speed up functionCan anyone help me to re-factor this code snippet. The "MAP" section holds information about which tiles go where on the screen (handled by another f…
... go where on the screen (handled by another ... LD (HL),A
POP HL
INC HL ... /> DJNZ LOOP2
PUSH DE
LD DE ... ADD HL,DE
POP DE
DEC C ...Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
... displays the colour for my screen tiles. Can anyone offer ... ,16
PRTTILELOOPX PUSH BC
PUSH DE
LD ... CALL PRINTTILE
POP DE
POP BC
INC E ...Fastest way to write something to screen$Hi, I just got pasmo.exe and start playing with attr scrolling, well, not scrolling, just write different values to a block and see if I can introdu…
... fastest way to update the screen. I know that ldir/lddr ... , but not sure about the push vs ld (hl),a.
LOOP
PUSH DE
DEC BC
Programming MC : first stepsIsn't nice to collect all kinds of short routines to help making the first steps into MC for everyone who never touched MC? What I mean is mostly th…
... print a score on screen
A simple Randomgenerator ...
random push hl ; save registers
push bc ; save registers ... restore
pop bc ; retrieve registers
pop hl
...Convert Screen to TAPHow do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one …
How do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one for memory and then copy them all together into one tap file)
Many thanks
