-
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…
... inc hl ; current pointer
ld d, (hl) ; to DE
ex (sp), hl ; ... updating
add hl, de ; restore HL
ex (sp), hl ; restore address of ...
add hl, de ; restore HL
ex de, hl ; swap pointers< ... -
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…
... /> ex de, hl ; swap pointers
sbc hl, de ; estimate address
ex (sp), hl ; result ... e, (hl) ; DE
push hl ; stack HL
ex de, hl ; number to 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…
... zero high byte
ex (sp), hl ; to suppress trailing spaces
ex de, hl ; base address to HL
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…
... hl, (sposnl) ; sposnl to HL
ex (sp), hl ; swap with echo-e
ex de, hl ... br /> ex (sp), hl ; ...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…
... inc sp
inc sp
pop hl ;HL=$000D
ex (sp),hl ;HL=$106E ...
push hl
Map compressor based on ZX7Hi I have release a map compressor for "La Churrera" game engine, but can be adapted to any other game. Source code is here (Download TmxCompress.0.…
... bytes
ex (sp), hl ; store source, restore destination
ex de, hl ; HL = destination + ... offset + 1
add hl, de ; ...Map compressor based on ZX7Hi I have release a map compressor for "La Churrera" game engine, but can be adapted to any other game. Source code is here (Download TmxCompress.0.…
... bytes
ex (sp), hl ; store source, restore destination
ex de, hl ; HL = destination + ... offset + 1
add hl, de ; ...Cross platform developmentI'm just vaguely considering supporting a few more retro 8 bit platforms for something I have in mind to do. Just Z80 and 6502 really, but that cove…
... /> pop de
ex (sp),hl
asm_itoa ... char *string
; exit : hl = char *string
; de ...
; carry set, hl = NULL
; (*) ... hl,1234
push hl
ld hl,buf
push hl
ld hl ...Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
...
pop de
ex (sp),hl
; write ...
;
; enter : hl = unsigned integer
; de = ... ;
; exit : ;;de;; hl = char *buffer (pointing at terminating ... />
ex de,hl
ld (hl),0
ret ...array offset (z88dk)Im trying to simulate a 2 dimensional array by using an offset [code] #include <fzx.h> char scr[768]; int arrayoffset(char x,char y) { return (x*…
The macro will work but it's like inlining code -- it will lead to a larger code footprint, which is what slenkar was trying to reduce.
If code footprint is important you can modify the macro to call a function to compute the index instead -- ...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…
... />
asm_memset:
; enter : hl = void *s
; e = char ... = uint n
;
; exit : hl = void *s
; de = ptr ... bc
pop de
ex (sp),hl
INCLUDE "../../z80/asm_memset ...ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
...
edup
ex (sp),hl ;19 additional delay
ex (sp),hl ;19
nop ...JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
Its similar to the EX (SP), HL instruction which always confuses me!:)SBC IX,DE/BCAlways wondered why there wasn't a SBC IX, DE/BC command.... so have to use PUSH HL ; save original HL PUSH IX ; IX on stack POP HL ; IX …
[code]
push ix
ex (sp),hl
sbc hl,de
ex (sp),hl
pop ix
[/code]
A bit shorter.SBC IX,DE/BCAlways wondered why there wasn't a SBC IX, DE/BC command.... so have to use PUSH HL ; save original HL PUSH IX ; IX on stack POP HL ; IX …
Though if you don't care about the contents of HL initially, then use POP HL/PUSH HL instead of the EX (SP), HL as it saves 17 t-states!Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …
... /> ;000A LD (TMP_HL),HL
;000D JP ... /> 000b : 21e905 LD HL,#05E9
000e : ... return
3894 : e3 EX (SP),HL; address
3895 : ...Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …
... /> ;000A LD (TMP_HL),HL
;000D JP ... /> 000b : 21e905 LD HL,#05E9
000e : ... return
388e : e3 EX (SP),HL; address
388f : ...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…
... /> ; stack = array_hi + 1
ex (sp),hl ; hl = array_hi + 1
ld ...
begin_loop:
ex (sp),hl ; hl = array_lo
push de ...amaurote with removed foregroundit`s good or bad ? [IMG]http://savepic.org/6483066.png[/IMG] [IMG]http://savepic.ru/6281893.png[/IMG]
... /> IM2 EX (SP),HL
LD (CONT+1),HL
POP HL
... LD (CONTSP+1),SP
PUSH DE
LD SP ... output routine
if SP=gfx area then DE ...Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... .c:80:
ld hl, +_cr
ex (sp),hl
call _sp1_Invalidate
ld hl,+14
add hl,sp
ld sp,hl
ld hl,+_main_se_1_101 + 1 ...
dec hl
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... NIRVANA_drawT_callee:
pop hl ; RET address
pop de ... ld d,c ; lin
ex (sp),hl ; tile
ld a, ... ld d,c ; lin
ex (sp),hl ; tile
ld a, ...What am I doing wrong here?[code]IF INKEY$=SCREEN$ (21,4) THEN LET SCORE=SCORE+1[/code] It's delivering a positive every time.
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…
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,…
... /> - Maintaining 2 separate variables in HL with EX (SP),HL
- Some things use ...Z88DK v1.99B ReleasedAt Sourceforge: https://sourceforge.net/projects/z88dk/ It's been a year since the last release so it was time for another. This is another tran…
...
pop hl ; hl = int b
push hl
push ... /> pop af
pop hl ; hl = int b
pop ... de = int a
ex (sp),hl ; hl = int b
ENDIF
pop af
pop hl ; hl = int b
pop ...Fuse 1.3.3 releasedA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: https://sourceforge.net/projects/fuse-emulato…
What’s the “hidden MEMPTR register”? Do you mean the WZ register pair that temporarily holds the operand of two- and three-byte instructions like JP, CALL, and EX (SP), HL?Fuse 1.3.3 releasedA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: https://sourceforge.net/projects/fuse-emulato…
... instructions like JP, CALL, and EX (SP), HL?[/quote]
Yes, AKA ...A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... ,0
ex (sp),hl ;swap screen_addr / sprite_addr
ex de,hl
jr ... A
msl_shift_done
ex (sp),hl
djnz msl_draw_loop ;rinse and ...A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... ,0
ex (sp),hl ;swap screen_addr / sprite_addr
ex de,hl
jr ... A
msl_shift_done
ex (sp),hl
djnz msl_draw_loop ;rinse and ...
