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Rafaelle CeccoHi all, I've been in contact with Raffaele Cecco of Exolon fame re source code. Unfortunately he doesn't have the original source code any more but…
...
ORG 7584H
LD HL,75A3H ;7584 21A375
; ... br /> INC HL ;758E 23
LD D,(HL) ;758F ... $756B A...LD.(
defb $24,$33,$2B,$31,$29 ... -
ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... me, a byte sequence 33,0,128 (ld hl,8000h) has 3 bytes ... -
ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
...
ld hl,data
ldi bc,(hl)
ld ix,0
ld a ...
ld hl,data
ldi bc,(hl)
ld ix,0
ld a ... ] org 24000
defb 33,211,93 ; ld hl,(data)
defb 78 ... -
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... ; hl=hl*5
ex de,hl ; de=hl
ld hl,#_con_font6x6
add hl,de ; hl ... 114, 106, 178, 112, 0, 33, 130, 8
.byte 112 ... /> .byte 34, 112, 0, 248, 33, 8, 32, 0
.byte ... /> .byte 230, 6, 240, 0, 33, 194, 8, 24
.byte ... -
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... on the high nibble [XXXX....]
Prt64High: ld a, (hl) ; get the screen ... [....XXXX]
Prt64Low: ld a, (hl)
and 0xF0
ld c, a
ld ... -
Games not compatible with the 128+ & grey +2Like the +2A & +3 thread, there are a few games that do not work correctly on the original 128+ and the grey +2. Two games that I know of that wil…
... c
ld (hl),33 ; overwrite c3 with 33, which is ld hl,num and ... ld hl,lback3-ofs
ld ($fe86+$01),hl
ret
;
lback3 ld hl ... ,$0040 ; 64 instructions
ld ($9c79),hl ; lower memory addresses
ld ($6f19),hl ... -
Help! I'm learning Machine Code...Having decided to take the plunge and learn to machine code a while ago, I have started in earnest using the much recommended 'Mastering Machine Code…
... /> loop: ld (hl), a
inc hl
inc a
cp #33
jr nz, loop
ld ... -
Add with Carry ExampleHi, I have been really struggling to understand this simple example from Mastering Machine Code and I wonder if anyone can help? I have include…
Nope.
After
[code]
LD DE,$3385
LD HL,$7BC7
[/code]
D = $33
E = $85
H = $7B
L = $C7
HTH,
Derek -
Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…
... channel to stream A
ld hl,23755 ;start base address at ... to base address
ld a,(hl)
pop hl ;**
cp " "
defb 50,37,99,132,33
MESSAGE:defs 34
Character Based SpritesHi, I'm working through Jonathan's excellent guide to writing games, and have mastered the animation of single UDGs. Before or move onto Pixel…
... colours
ld a,(de)
ld (hl),a
inc de ... l
ld a,(de)
ld (hl),a
inc de ...
ld hl,graphics-144
ld a,(gnum)
ld b,a ...
defb 255, 210, 33, 127, 255, 64, 4, 47 ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... />
[code]
33, 0, 64 LD HL,32768
17, 0 ...
[code]
65344 33, 0, 64 LD HL,16384
65347 17 ... RET
65356 33, 0, 228 LD HL,58368
65359 17 ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... />
[code]
33, 0, 64 LD HL,32768
17, 0 ...
[code]
65344 33, 0, 64 LD HL,16384
65347 17 ... RET
65356 33, 0, 228 LD HL,58368
65359 17 ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... ]LD HL,16384[/b]
becomes the three bytes [b]33, 0 ... [/b]
[b]33[/b] means 'LD HL,....' and 0 and 64 ... /> [code]
LD HL,16384
LD DE,58368
LD BC,6912
1030 POKE DE,PEEK HL:
LET HL=HL+1: LET DE=DE ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... instruction. So it reads 33, identifies it as 'LD HL,nnnn', then it ... />
[code]
65344 33, 0, 72 LD HL,18432
65347 17 ... RET
65356 33, 0, 175 LD HL,44800
65359 17 ...RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... was this
LD HL 44800. 33,0,175
LD DE 18432 17 ... ,0,72
LD BC ...Graphics program in AssemblyHi so I think I'm getting the hang of this so I've done this program. It writes directly to the screen. I'm using ZX Spin. [code] LD HL,16384 LD B,…
... /> [code]
ld hl, 16384
ld de, 16385
ld bc, 6911 ; or ... not need attributes
ld (hl), 170
ldir
LD HL, 16384 is 33,0,64
LD DE, 16385 is ... is 1,255,23
LD (HL), 170, is 34, 170 < ...Graphics program in AssemblyHi so I think I'm getting the hang of this so I've done this program. It writes directly to the screen. I'm using ZX Spin. [code] LD HL,16384 LD B,…
... again
LD HL 16384 is 33,0,64
LD BC 6144 is ... 1,0,24
LD ... 87,n
Loop
LD (HL), D is 114
INC ... D is 20
INC HL is 35
DEC BC ... is 11
LD A,B is 120
how to load machine codeI'm reading Jon Caldwell's how to write Spectrum games but can't enter the code! Here's an example:_ LD BC, (score) Call 6683 I tried putting…
... eg LD HL, 16384 corresponds to the sequence
33,0,64 ...
LD DE, 51200 would ... /> 17,0,200
LD BC , 6912 is
1 ...Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…
... db %00000111;line 48 ;line 33 (07)
db %00001000;line ... a ;x2
ld (hl),b ;Restore (HL)
ld b,a ;Overlay ...Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…
... db %00000111;line 48 ;line 33 (07)
db %00001000;line ... a ;x2
ld (hl),b ;Restore (HL)
ld b,a ;Overlay ...Where's my green square? Basic & m/c question.I'm going mad here - can anyone tell me why my little basic program isn't displaying a green square at the top of the screen? I've checked the num…
LD HL, nn is 33, not 21
LD (HL), n is 54, not 36
All you have done is use the hex values instead of the decimal values, :)
50 DATA 33, 15, 88, 54, 32, 2011k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
... db %00010111;line 33
db %00000111 ... /> ld a,(hl) ;
or e ;
ld (hl),a ...1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
...
ld hl,data_17
ld de,0ffc0h
ib_loop1:
ld a,(hl)
db %00010111;line 33
db %00000111;line 34 ...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…
... .opcode)
DEFB $CB,$33 ; SLS E (undoc.opcode)
LD (HL),A
INC HL
INC DE
LD A,(DE)
LD (HL ...BREAK key on 128k SpectrumWhat happens when BREAK is pressed on a 128k Spectrum? Why is it different from what happens on a 48k Spectrum. Is there a way to disable it or to …
... /> DATA 243,59,59,251,33,158,27,229,42,69 ... /> ei
ld hl,$1b9e ;LINE-NEW
push hl
LD HL,(23621) ;PPC ...Ensure program runs in USR 0 mode?Is there some BASIC that can be used in a program to make sure the the program runs (even on 128k models) in 48k or USR 0 mode? I obviously then wan…
... 54,62,43,249,33,3,19,229, ... Switch to 48 basic
ld hl, (RAMTOP) ; Recontruction of ... without GOSUB)
ld sp, hl
ld hl, $1303 ; Standard ...Loading Images/Screens mid-gameHi all, Looking to get back into a bit of coding and I couldn't figure out a way to do the following: I have an image/SCREEN that I'd like to b…
... />
LD HL,SOURCE
LD DE,DESTINATION
LD BC,LENGTH
[b]LD HL , 30000[/b] ; source ... to read from
[b]LD DE , 16384[/b] ; ... its going to
[b]LD BC , 6912[/b] ; ... : NEXT N
30 DATA 33 , 48 , 117 , 17 , 0 ...
