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Screen LoaderCouple days ago i find very interesting loader routine in ex Yugoslavia magazine "Svet Kompjutera" from january 1987. Authors of article, calls this …
... /> LD HL,49152
LD (HIL),HL
LD DE,16384
LD (DIL),DE
LD ... /> LD (FL1),A
LD HL,(HIL)
INC HL
LD (HIL),HL
LD DE ... /> KRA LD HL,RP
LD (RRR+1),HL
LD DE,23295
LD H… -
Pixel Explosion CodeJust a little snippet to cause explosive effects. It uses table lookups for the screen address, and can handle up to 32 pixel particles. A particle…
... not moved
ld hl,madp_dec
ld (madp_poke+1),hl
... new position)
ld hl,madp_move
ld (madp_poke+1),hl
xor (hl) ; xor with screen
ld (hl),a ; screen ... -
tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... /> ld a, (hl) ; bring a byte
dec hl ; move back
ld (hl), a ... ; store byte
inc hl
inc hl ; next one!
ld ... /> ld (hl), a ; store byte
inc hl
inc hl ; next bye.
ld ... -
Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…
... /> ld sp,hl
pop hl
ld (l8c0c+1),hl
pop hl
ld (l8c23 ... /> l8ac5: ld hl,l8d6b
ld a,(hl)
inc hl
ld (l8ac5+1),hl
Mode 2 Tile Editor SourceA Timex Mode 2 Tile Editor incorporating a byte mirror table. The compiled version is available in the CSSCGC 2008 collection from the WoS archive. …
... /> ld (hl),b ;
inc h ;
ld (hl),b ;
inc l ;
ld (hl ... ),c ;
dec h ;
ld (hl ... ),c ;
dec h ;
ld (hl ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
...
inc hl ; move HL up one address
ld (hl),'P' ; channel ... />
ld hl,col ; increment
inc (hl) ; the column
ld a,(hl) ;
add hl,hl ; multiply
add hl,hl ; by
add hl,hl ; eight
ld de ...My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... call ClearScr
ld hl,image+2
call ... /> ld hl,SCREEN
ld (hl),0
ld bc ... ld hl,ATTRIBUTES
NextAttr:
ld a,(hl)< ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... [/B]
ld hl,16384 ;screen address
ld de,35000 ;address ... store in memory
ld (hl),a ;put graphic into screen ... ] ;rotates second byte
ld (hl),a ;write earlier rotated byte ... in saved "carry"
ld (hl),a ;write to screen memory ...Help hacking Split PersonalitiesI`ve been hacking away at Split Personalities for the purpose of putting new screens and graphics (items). The current screen is at 41187 and is 160…
... ; 54564 32 33
ld (8737), hl ; 54566 34 33 34
inc bc ; 54591 3
ld hl, 33 ; 54592 33 33 0 ... bc ; 54626 3
ld (33314), hl ; 54627 34 34 130
ld h, c ; 54630 97[/ ...sound effect code causing crash[FONT=Courier New]I have just written this piece of code to produce a lazer sound effect but for some reason it is causing a crash and I can't figure…
... LD HL,SOUNDDATA
LD (SOUNDPOS),HL
LD A,1
LD (LAZERFLAG),A
LD ...Use of INPUT in MCI want to use the INPUT-command in MC and made the following code. [code] org 40000 dump 40000 ld hl,(#5c5d) push hl …
... />
ld hl,(#5c5d)
push hl
ld hl,input
ld (#5c5d),hl
call ... #2089
pop hl
ld (#5c5d),hl ...AY-player from Rastan SagaHello. For what ports #3F, #5F in the given fragment of a code are used? They give What effect in sounding? ================================= F4C1 21…
... =================================
F4C1 21BAF7 [B]ld hl,F7BA[/B]
F4C4 160C ... F4CD 013FFF [B][COLOR="Red"]ld bc,FF3F[/COLOR][/B] ... /> F4D8 7E [B]ld a,(hl)[/B]
F4D9 2B ... [B] dec hl[/B]
F4DA D35F ...If you've got a real working MF128,IF1, and MDR combo can I ask a favour?So, if you do have a real Multiface 128, Interface 1, Microdrive and, oh yeah, a Spectrum (48k or 128k) that are all working, can I ask a favour...? …
... address
push hl
exx
;
ld hl,(err_sp) ; fetch current ... error return
push hl ; and preserve ... error return
ld (err_sp),hl ; and update
ld a,$ff ; force ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... /> org 32000
main
ld hl,$410a ;road left side,line2 ... ,$ff ;graphic for roadside
ld (hl),a ;print road left side ... side posn
scrldn
ld hl,22527 ;point to bottom right ... to be copied to
ld hl,$7e0 ;2016 added . . .
...Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…
... RES 0,(IY+2)
LD HL,(23627) ; VARS
NEXTVAR< ... LD A,41
POINTERS
INC HL
LD E,(HL)
INC HL ...
LD D,(HL)
INC HL
NEXTCHAR
INC HL
LD A,(HL)
BIT 7,A ...Speccy sound on tv show - againRemember the spectrum loading noise in two CSI shows? Well, fuzzix on c.s.s. has found what seems to be another clip of Speccy goodness: [url]http:/…
... br /> 30 LD HL,#53F
40 PUSH HL
50 LD DE,#4000 ...
60 LBYTE LD A ... /> 100 NBYTE LD L,1
110 LD BC,#B201
170 LD B,#B0
180 JR ...128 ROM paging alternativeWould this work (with the appropriate code in each ROM)? [code] ; 128 rom paging routine ; use rst 28h with call address stored after restart ;;rom…
... /> ld hl, 0x0000 ; sp to hl
add hl, sp ;
ld e, (hl) ; (sp ... ) to de
inc hl ;
ld d, (hl) ;
back_to_r0
ld hl, bankm ; hl holds address of system variable ...New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…
... /> add hl,de
ld (hl),a
inc hl
ld (hl),a
ld de ... ,21
add hl ... /> ld hl,23278 ;initialise car
ld a,8
ld (hl),a
ld (32900),hl ...So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
... LD HL,14
ADD HL,SP
LD SP,HL ; undo USR command
LD HL ...Tips on optimizing some newbie assembly routinesI'm starting to learn some assembly language. The best way to learn is to actually code something you are going to use, so I'm creating a very simple…
... /> add hl, hl ; * 2
add hl, hl ; * 4
add hl, hl ; * 8
ld de ...Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…
... /> ;
main1 ld (err_sp),sp
ld hl,main2
ld (hd_11),hl ; execute main2 ... /> ;
ld hl,filenam
ld (t_str1),hl ; address of filename
;
; ld hl,1 ... us
;
ld hl,1
ld (n_str1),hl ; length of filename
Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
... /> push AF
pop hl
ld (R_AF),hl
ld hl,(R_HL)
push AF
pop hl
ld (G_AF),hl
ld hl,(G_HL)
ld hl,(G_AF)
push hl
pop af
ld hl,(G_HL)
ld ...Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... /> fillscreen
ld (hl),a
inc hl
ld (hl),a
ld de,9 ... /> add hl,de
ld (hl),a
inc hl
ld (hl),a
ld de ... /> ld hl,23278 ;initialise car
ld a,8
ld (hl),a
ld (32900),hl ...Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
...
DI
LD HL,23296 ;fill 256 bytes with ...
LD DE,23297
LD BC,255
LD (HL),C
LD HL,77*256+237
LD (65525),HL
LD A ... ,91
LD I,A ...Wrong-endian data table?I'm drawing up the memory map for something I'm writing. I'll be using machine code on a byte array of 256 elements, each element consisting of 64 by…
... selected with a single [b]LD L, A[/b] instruction, without ... can be read using [b]LD A, (HL)[/b] while simply looping ...tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …
...
[CODE]
call_from_table
;HL = table
;A = ITEM
ld a, (hl)
inc hl
ld h, (hl)
ld (call_from_table2 + 1), hl
[CODE]
ld a, (ix + FRAC_PEN)
ld hl, p2_fracpentab
call ...A tidy loader for minigamesThe minigame competition doesn't permit the use of separate loaders like [code]10 LOAD "": RAND USR 32768[/code] The loader must be included in the b…
The minigame competition doesn't permit the use of separate loaders like
[code]10 LOAD "": RAND USR 32768[/code]
The loader must be included in the byte count.
In an attempt to save as many bytes as possible, people have written ...Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... /> ld ix, source
ld hl, dest
ld de, 8 ; stepsize
ld a ... = 54
ld sp, hl ; 6
push hl ; 11
push ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... />
ld a, (hl)
inc a
ld (hl),a
... />
ld a, (hl)
inc a
ld (hl),a
... />
ld a, (hl)
inc a
ld (hl),a
jr ... br />
ld hl,text
loop ld a,(hl)
cp 255 ...
