-
Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... Get current parity
0xEAA0 XOR L ; Update parity
... ROM)
0xEAEC RRA ; Shift Ear bit (ROM)
0xEAED ... color (ROM)
0xEB28 XOR 03 ; Alternate border between ... -
Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…
... these in total for every shift
rrca ;using both RRCA ... ),a
dec l
xor c
or (hl)
Code optimisation! 16bit number to 5 digit stringJust for interest this one, any thoughts on how to make this as fast as possible? Little optimisations to this routine or a complete reimagining? …
... add 3 before the left shift for each decimal digit, for ... bytes, 256cc
bBinBCD:
xor a
ld b,8 ... bytes, 801cc
wBinBCD:
xor a
ld bc,0802h ...A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... inc e
xor (hl)
ld (hl ... ret
shift
;shift detected
dec a ... /> ld a,(hl)
xor d
ld (hl), ... ld a,(hl)
xor e
ld (hl ...A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... ;hl screen_addr
;a shift data
push hl ; ... ld hl,(sprite8x8)
;shift detected
ld (ptr_shift ... /> ld a,(hl)
xor d
ld (hl),a ... ld a,(hl)
xor e
ld (hl ...ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
... ; 4t
rlca ; 4t
xor %10000010 ; 7t
ld d ... back to attr space
xor d ; 4t
rra ; 4t ...A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... (23693),a ;set ATTR_P
xor a ;BORDER = 0
call ... into A again
rrca ;shift A right 3 times (divide ... cp 39 ;is it CAPS SHIFT?
jr nz,as_is_key ; ... /> s_shf defm "S.SHIFT"
c_shf defm "C.SHIFT"
...ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
... ; attribute message scroll
XOR A ; FA1D AF
... C9
L_FAD6: XOR A ; FAD6 AF
LD ...
CALL L_FB51 ; shift message2 attributes one byte to ...ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
...
ld a,(hl)
xor c
sub (hl)
jr nz,shift
nxt_col:
pop hl ...
halt
xor a
rrc c
ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
...
ld a,(hl)
xor c
sub (hl)
jr nz,shift
nxt_col:
pop hl ...
halt
xor a
rrc c
ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
... 01 1F 00
LDIR ; shift left 31 attribute characters, 1 ...How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…
... br /> XOR %00000111 ; XOR offset to get left shift offset
INC IX ; Shift IX to point at the ... /> CALL _get_next_row ; Shift HL to point exactly ...Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…
...
inc de
xor a ;zeroize A (number of ...
inc d ;shift one pixel down (esthetic choice ... byte into C
xor a ;clear A, CY, ... no? Make B our shift counter
ex af ... char_shift
rr c ;shift through Carry
rra
im looking for a machine code star-field routineim looking for a machine code star-field routine. preferably with mnemonics.
... . When it wraps-around, randomly shift it to a different position ... out the plot position and XOR a dot up for the ... erase it again with another XOR next-time-round. Or just ...Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
... ;
a2s_l:
sla l ;shift left x 3
jr ... (right into left)
xor 21h ;make the ATTRs address ...Kempston Mouse DriverHi Folks, Does anyone know the email of Chris Cowley who wrote the Kempston Mouse Driver in the WOS Archive? Many thanks Paddy
... C
XOR %00000111 ; XOR offset to get left shift offset
INC IX ; Shift IX to point at the ...
CALL _get_next_row ; Shift HL to point exactly one ... mouse_btn
set_top_edge
XOR A
LD (PointerXY+1 ...Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…
... de ;next cell
xor a ;zeroize A (number of ... />
inc d ;shift one pixel down, as we ... byte into C
xor a ;clear A ("tail"), ... ;no? Make B our shift counter
ex af ... char_shift
rr c ;shift through Carry
rra
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…
... :
; zero A
xor a
; convert row -> ... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ...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…
... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ... :
; zero A
xor a
; convert row -> ...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…
... :
; zero A
xor a
; convert row -> ... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ...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…
... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ... :
; zero A
xor a
; convert row -> ...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…
... :
; zero A
xor a
; convert row -> ... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ...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…
... /> jp nz, mainloop
xor a
ld (quitpressed), ... being pressed
; #FE - SHIFT, Z, X, C, & V ... :
; zero A
xor a
; convert row -> ... sprite16x16caXOR:
; zero A
xor a
; convert row -> ...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…
... :
; zero A
xor a
; convert row -> ... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert y-coord ... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ...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…
main, mainloop, read keyboard and update player
[code]
ORG 32768
main:
IF NOPS_AT_START
nop
nop
nop
nop
ENDIF
IF RETURN_TO_BASIC
ld (stashed_iy), iy
...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…
... /> ; point DE to the shift buffer
ld de, shiftdata_lbuff ... :
; zero A
xor a
; convert y-coord ... :
; zero A
xor a
; convert row -> ... :
; zero A
xor a
; convert row -> ...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…
... feed on either symbol shift/caps shift + enter but ... shiftand1otherlinepressed
.toomanylines
xor a
inc a
.only1halflinepressed
xor a ; zero A
...
inc c
xor a
ret
...
