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SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... zero
pop hl ; limit value
push hl ; ...
l_numeric:
push hl ; stack destination pointer
push de ; stack pointer to ... so
ldir ; else copy to workspace
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ) ; restore pointer
pop bc ; length
push bc ; to BC
inc bc ; increment length
lddr ; copy ...
pop hl ; unstack counter and discriminator byte
push bc ; ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... exx ; alternate register set
push hl ; stack pointer to next ... ldir ; copy
ex de, hl ; exchange pointers
pop hl ; unstack ... ; stack
push hl ; routine address
push bc ; stack address ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> end_tests:
pop af ; unstack carry flag
push af ; restack carry ... br /> other_str:
pop bc ; unstack second
pop hl ; string parameters ... add
push de ; stack it
ldir ; copy the string to ...IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
[QUOTE=Zup;730789]In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not.
There are any way to check it out from BASIC (without breaking the program if it does not exist)?[/QUOTE]
...Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... made some error in the copy routine that I published earlier ... kB
[CODE] ;proper copy routine
LD IX,49152 ... /> POP AF
LD SP,IY
PUSH AF
PUSH BC
PUSH ...Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... part.
[CODE] ;proper copy routine
LD IX,49152 ... /> POP AF
LD SP,IY
PUSH AF
PUSH BC
PUSH ... DE
PUSH HL
EXX
PUSH BC
PUSH ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... 0x1d34
f_l_and_s:
push hl ; stack pointer
... fce ; exit calculator
pop hl ; unstack pointer
... of limit
ldir ; copy bytes
ld hl, ... ; examine statements
pop bc ; unstack end of ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... push af ; stack it
call scanning ; evaluate expression
pop ... hl, in_var_1 ; stack
push hl ; return address
... br /> call ed_copy ; copy input to display
... ; reduce range
push af ; stack color item< ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... cd_prms1 ; call subroutine
push bc ; stack arc-count< ... br /> pop bc ; diagonal step to BC'
push bc ; ... /> ld c, a ; copy A to C'
call ... /> ld a, c ; copy C to A
... d, (hl) ; get a copy in D
res 0 ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... /> push bc
push de
push hl
[/COLOR]
//copy backbuffer ... ="Red"]
pop hl
pop de
pop bc
pop af
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... , hl ; swap pointers
ldir ; copy initial channel table
ex ... hl, init_strm ; source
ldir ; copy initial streams table
ld ... prog
pop bc ; unstack length without parameters
push bc ; restack ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... /> //copy backbuffer to screen
#asm
push af
push bc
push ... />
pop hl
pop de
pop bc
pop af
Renegade Hit Squad Re-releaseI've found a problem with TZX included in file [url]ftp://ftp.worldofspectrum.org/pub/sinclair/games/r/Renegade(TheHitSquad).tzx.zip[/url]. The Spee…
... , it's just that last block which can be fixed in ... in Spectaculator if you have fast loading switched on so maybe ... /> Anyway, my copy matches in TAPIR - just that last block differs because ... of the above: That last block needs a fix and then ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... in old reference
push hl ; stack current ... ; temporary buffer
push hl ; stack line number< ... pop bc ; unstack digits in new line number
ldir ; copy ... 0x3b79
lines_to_de_2:
push bc ; stack counter
...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... push de ; stack destination
push ...
pop bc ; ... (hl) ; copy even bits
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... push bc ; stack both
push ... ; copy bytes ... pop bc ; unstack address
pop ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... push bc ; stack count
call ed_left ; cursor left
pop ... call nz, ed_copy ; copy line if so
SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
... /> call $0b38 ;PO_GR_1 builds block graphic in MEMBOT
ld ... ,$15,$90
defw BLOCK ;recalculated by BlockGen
... ScrDol0 address
push bc
pop ix ;IX=ScrDol0 runtime ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... you could do it blindingly fast using the stack...
< ... /> pop af; 14
pop bc; 16
pop de; 18
pop hl ... ; 20
pop ix ... /> push af
push bc
push de
push hl
push ix
push ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
...
pop de ;DE=display file address
push de
ld b,8 ;copy char to ...
djnz PRINTAB
pop de ;calculate next position
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... thing, isn't using LD:PUSH in a flip screen game ... like this, say[code] ;...
pop de
ld a,(hl ... this engine is a very fast routine that prints pre-shifted ...A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... next block
push hl ; I preserve the index
push bc
pop ... ,5
call dos_read
pop hl ; I restore my index ...Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... C, from row top HL, fast enough.
[CODE ... row top
loop3: push hl ;keep char cell top ...
loop2: push hl ;keep start of line ... ;repeat 'b' times
pop hl ;back to start of ... the above happens
pop hl ;one row done, ...Idiots Guide......To machine code, or assembler language...whatever the appropriate term is Basically at this stage I want to fiddle about and try and get used to…
... a loop writing to a block of memory); modern compilers expend ... ,_result ; string destination
push hl
ld hl,33 ... exx registers changed
push hl
rst $10 ; forgive ... rusty with ROM code
pop hl
inc ...Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
... LD H,0
PUSH HL
PUSH DE
... AF'
POP DE
POP HL
...
PrepareMap_Mod1 ;63872
;change copy tiles to buffer in loop ...
PrepareMap_Mod2 ;63892
;change copy single tile to buffer code ...Outputting debug trace to RS232 (assembly)Hi Guys, I'm working on a game at the moment (written in assembly) but I am really needing to write out a debug trace of what is going on with the p…
... A
RET Z
PUSH HL
RST 8
POP HL
INC HL
copy and paste in a default ...Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... ;BC=number of bytes to copy
add hl,de
push hl
sbc hl,de ;old - new
pop hl ...Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... "Saboteur", I transfered the code block from the tape to disk ... hl,40000 ; address of compressed block
ld de,25200 ; address ...
m3 dec b
push hl
ld l,c ... b,0
ldir
pop hl
jr m0
A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... next block
push hl ; I preserve the index
push bc
pop ...
call dos_read ; read block
pop hl ; I restore my index ...
