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Rally Driver Hi-Score Challenge!!!I was looking for a game to aid [URL="http://www.worldofspectrum.org/forums/showthread.php?t=43476"]MickMog's thread[/URL] and discovered this little…
... find a link for the Fast Show of Simon and Lindsay ... inlay too, anyone got a copy? I've found [URL="http ... 'don't buy this', if push came to shove I'd ... -
Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... first still does a POP afterward so the 2nd ... ; exit EXO[/COLOR]
push de
ld d, ... write
push IY
call deexo
pop IY
... destination register for each compression block. For example, with this ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... JR NC,UM4 ; "1" means "copy an uncompressed byte"
LDD ... /> LD B,0
LDDR ; copy the string from the already ...
DEC HL
PUSH BC
PUSH HL
LD L ... /> JR NZ,UM10
POP HL
POP BC
RET
Horizontal Scrolling/Per Character gamesHello. Can anyone give me the titles of some Speccy games (preferably good ones, but I don't mind hearing about bad ones too) that scroll the playin…
... hidden screens, but the really fast and clever ones do it ... to find and copy the data for each block in turn.
Horizontal Scrolling/Per Character gamesHello. Can anyone give me the titles of some Speccy games (preferably good ones, but I don't mind hearing about bad ones too) that scroll the playin…
... hidden screens, but the really fast and clever ones do it ... to find and copy the data for each block in turn.
fast and smooth and a great ...Full 16*16-digit BASIC multiplicationI liked Andre Adrian's 32-bit long multiplication routine so much that I decided to a decimal version. After all, 2^63 is only 9223372036854775808, a…
... digit
push de
exx
pop hl
... br /> ;16 bytes copy area
COPY: equ WORKSP+24< ... Z
ld de,COPY
ld bc,12 ... ldir
ld hl,COPY
ld de,Ba< ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ; decrement data length
push bc ; save new data length ... indicates load error
pop hl ;remove the data length ... screen. The turbo block is a generalized data block as described above ...Confounded DEF FNCan anyone see why this is going wrong? I've been tinkering with it since tea time and got nowhere. [code] 2 DEF FN t$(n,t,d) =STR$ INT (n/t)…
... pop hl ;HL=$000D
ex (sp),hl ;HL=$106E
push ... hl
push de
push bc
ld ... exx
ld d,0 ;copy denominator to 'D'E'
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> ld a,c ; copy working value into accumulator
push hl ; at this point, HL ... /> ld (.border_routine_addr),hl
pop hl
endm
...Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …
... games using internal shadow screen(fast copy of data blocks to videoram ... ). DMA chip can send data block from ZX ram to ULA ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... DE = 0x4000, 16384
push de
ld b,0x18 ... ldir
;; decompress block 2
ld hl,.block2 ... />
;; decompress block 1
pop hl ; 16384
ld ...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... /> pop de
pop hl
push hl
push de
push bc
push ... CALLEE linkage results in small, fast code. You can also see ... /> pop de
pop hl
push hl
push de
push bc
push ...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... />
[quote]
1) push af: pop af when needed. Requires 'a ... br /> [/quote]
"push af; pop af" might be an option ... This might be just as fast as the traditional way of ... vararg functions. The caller can push more arguments than the target ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... can deal with the z80 block loads and some of the ... h,a
enter
push hl
ldi
ldi ... br /> ldi
ldi
pop de
jp pe,loop ... h,a
here
push hl
ldi
... br /> ldi
ldi
pop de
jp pe,loopb ...MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …
... PC. It's all too fast of course. The NPC roamers ... *32 copy of the attributes file which I was holding. Block objects ...Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…
... work but it was mighty fast without them. POKE 30052, 201 ... /> ...
StrengthSubtract1:
85b4 c5 push bc ; Refill strength indicator
85bf f1 pop af
85c0 ee10 xor ...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…
... ). Moreover, the "rolled loop" [B]PUSH[/B] version could be further ... you are always going to copy a block of bytes outside contention ... " [B]PUSH[/B]. And if your program will always copy a block of ... variant of "rolled loop" [B]PUSH[/B] during screen scan such ...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…
... ). Moreover, the "rolled loop" [B]PUSH[/B] version could be further ... you are always going to copy a block of bytes outside contention ... " [B]PUSH[/B]. And if your program will always copy a block of ... variant of "rolled loop" [B]PUSH[/B] during screen scan such ...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…
... :
ld hl, (ch_add) ; copy address of current character
push bc ; stack BC
call keyboard ; read keypress
pop ... (iy + _err_nr), l ; then copy to err_nr
ld sp ... /> ld a, (hl) ; copy character at current address to ...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…
... _mode) ; mode to C
push hl ; stack pointer
call ... for meta and control
pop hl ; unstack pointer
... :
ld b, d ; copy shift byte
ld a ... k_decode:
ld a, e ; copy main code
k_decode_1 ...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…
... hl,(23563) ;HL=(DEFADD)
push hl
inc hl
pop hl
ld bc,12 ...
xor $0f ;change to block graphic inverse code
Matched ...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…
... /> LDIR
;proper copy routine
LD IX,49152 ... /> POP AF
LD SP,IY
PUSH AF
PUSH BC
PUSH ... [/B] tstates for a byte copy, easily beating LDI. The routine ...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…
... fce ; stack
push de ; stack both
push hl ; pointers
push hl ; stack HL'
exx ... /> pf_save:
push de ; copy
exx ; DE
pop de ; to
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
