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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…
... ; discard
pop bc ; stacked
pop bc ; pointers
pop hl ; unstack ... ; make space
pop hl ; unstack pointer
push de ; stack start ... stack to line
ldir ; copy it
ex de, hl ... -
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…
... 0x270d
s_push_po:
push bc ; stack priority and op ... 0x2734
s_loop:
pop de ; get last op- ... 0x2764
s_runtest:
pop de ; unstack last op- ... 0x2770
s_endloop:
pop bc ; unstack present values
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
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…
... ; scrolling required?
pop de ; unstack DE
push bc ; stack position ...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
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
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…
... 23296.
ld hl,dec40 ; copy unpacker
ld de,23296 ...
m3 dec b
push hl
ld l,c ... b,0
ldir
pop hl
jr m0
How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... C with attributes A'
push af
ld ... character A at DE
push de
cp $90 ;UDG ... /> pop de ;DE=display file address
ld b,8 ;copy graphic ...Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
... file - don't try to copy it somewhere in the middle ... />
print_tile:
push bc ; temporarily store BC
djnz print_character
pop bc ; retrieve BC
call ...SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... subroutines that act like "PUSH IFF2" and "POP IFF2":
[URL ... for the 6502 being a copy of the 6800 is a ...Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... a much quicker way to copy data. You use the ... of your data. Do POP to suck up data into ... want it to go, and PUSH all those registers (in ... bytes.
Remember POP moves the stack pointer minus ... a value from memory; PUSH moves the stack pointer plus ...Sorting BusinessThis is a little bit different from the usual game-related fare but I know there are a few people here who like this sort of thing. This is about so…
... . You cannot make a copy of the pivot element as ... large enough that making a copy is undesirable. I did ... do that by making a copy on the stack but ... -i)
pop de ; de = size
push hl ; save ...
