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Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... ld e,l
ld d,h
lp dec l
bit 3,h
jr nz, alp
lp3 ld d,h
ld e,l
bit 6,h
jr nz,lp3
Wanted top cash paidHi All if anyone can help me in my quest for the following games then please get in touch with me at [email]mcjoecool@aol.com[/email] I am after the…
... director (black and white cover) - D&H
Football Club - Frozen ...Wanted top cash paidHi All if anyone can help me in my quest for the following games then please get in touch with me at [email]mcjoecool@aol.com[/email] I am after the…
... director (black and white cover) - D&H
Football Club - Frozen ...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…
... count
ld a, d ; D to A
and a ... 8 ; count
ld d, e ; D to E
rl d ; rotate D' to set carry
ld d, h ; HL
ld e, ... A
ld c, h ; H to C
ret ; ...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…
... ; stack error register
ld d, b ; first parameter
... ; jump if not
ld h, d ; last character
ld l ... DE + 2
ld d, (hl) ; LD D, (DE + 2)
... bc ; stack length
ld d, h ; last location
ld e ...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…
... , l ; is second
or h ; string null?
ex (sp ... total length
ld b, h ; and store
ld c ... 0x360c
stk_ptrs_2:
ld d, h ; DE points to second
ld b, h ; store in
ld c ...filled shape creating codeDevelopment is continuing well on a resurrected project of mine from about 20 years ago. Speed and size optimizations are going well along with displ…
... /> add hl,bc
ld d,h
ld a,(de)
inc h
xor d
ld (hl),a ...
inc h
[hl correction ...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
ld d, (hl) ; get line
... ; prog to HL
ld d, h ; HL to
ld e ...
each_s_1:
dec d ; statement found?
ret ... jump if not
dec d ; decrease statement 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…
...
cls2nd:
ld d, h ; copy HL
ld ... ; output
ld (hl), d ; address
ld (iy + ...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…
... .ifdef ROM1
ld d, h ; first character
ld ... and count
ld h, d ; attribute byte
...Clear the screen from assemblerI want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is p…
... a
set_mem:
ld d, h
ld e, l
d have to look it up ...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…
... br /> dec hl
ld d,h
ld e,l ;DE ...
scf
ld d,e ;D =multiplication factor
Loop2: ... /> ;convert octal to decimal
;d from o(123...n) = ( ( ( ...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…
... /> ld hl,BIN2040 ;H'L'=address of binary number ... ;convert octal to decimal
;d from o(123...n) = ( ( ... c,Loop5NC
ld d,h
ld e,l ... hl
ld a,h
or l
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 …
... /> ld hl, 0
ld d, l
IF data & ... data & %10000000
ld h, 0
ld l, e ... , 0
ENDIF
ld d, h
[/code]
PD ...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 …
... /> ld l, e
ld d, h
add hl, hl
ld hl,0
ld d, h
ENDIF
IF data ...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 …
... , 0
ELSE
ld h, 0
ld l, e ... [B]!=[/B] 128
ld d, h
ENDIF
IF data ...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 …
... , 0
ELSE
ld h, 0
ld l, e ... ;& data != 128
ld d, h
ENDIF
multsub %10000000 ...Organ Master Echosoft by CurrysI can't find any video / demo about this interfaces, but I'd like to get this it. Anyone have this piano keyboard? I'd like to buy it. Thanks to all…
Any news? Someone with the complete interface on sale? Make my day!
D.H.What Spectrum projects (Software/Games/Utility)(Hardware)(Others) are you working on?So, basically that :) You dont have to give names or more clues if you dont want to ;) Also, if you are working on more than one, you can tell all of…
Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... , 0
ELSE
ld h, 0
ld l, e ... ;& data != 128
ld d, h
ENDIF
multsub %10000000 ...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... set
ld d,h ; put high address in d from h
ld ...Colission detection problems.G'ah...it's always the same (I've asked before too) - I'm always struggling when it comes to doing box colission checks, so I'm basically hoping you …
... variable sizes but thought I'd share it.
Also its ... /> LD B,0
LD D,H
LD E,L
Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... 32768
ld h,10 ; Put Y Coord in ... 7)
ld a,h
rrca
rrca ...
rrca
ld h,a
and $e0
ld h,a ; Attribute start address ... br /> ld d,h ; put high address in d from h
...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... br /> rrca
ld h,a
and $e0
ld h,a ; Attribute start address ... /> ld d,h ; put high address in d from h
... br /> rrca
ld h,a
and $e0
ld h,a ; Attribute start address ...
