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47 Spectrum Games For SaleHi, sorry to sell on my first post, but here goes anyway. I've been having a clearout and have the following games for sale: Spellbound - Beyond Sty…
... - Gremlin Graphics
Cosmic Cruiser / BC Bill - Imagine
Micro Mouse ... -
Bresenhams circle algorithmI post here my final circle code to replace, if you want, the one in the ROM. It only uses integer math and runs very fast and is very compact. It is…
... push hl
push bc
call plotpixel< ... push hl
push bc
call plotpixel< ... push hl
push bc
call plotpixel< ... hl
push bc
call plotpixel< ... -
CHANS system variableI modified my original code to incorporate Woody's changes and avoid using the stack: [code] org 60000 save_registers: push hl push de push bc …
...
push de
push bc
make_space:
ld ... b, h ; transfer result to BC
ld c, l ;
restore_registers:
pop bc
pop de
pop ... -
New game bundles!Hi!, I have a few nice game bundles being listed on ebay this Thursday and here is a preview:- [SIZE="2"][COLOR="DarkGreen"]Lot 1-Small box versio…
... /> HORACE GOES SKIING-CLASSIC
BC BILL
LODE RUNNER-SEALED ... -
RUSSIAN SOFTWARE and real ZXRussian ZX games is writed on russian ZX clones and support hardware feature TURBO OFF ( for ZX clone ZS SCORPION ). Russian ZX clone ZS SCORPION use…
... remove instruction IN ?,(C) if BC=#1FFD or #7FFD.
LD BC,#1FFD
IN ?,(C)
LD BC,#7FFD
IN ?,(C)
99+ original tapesI'm looking to sell at a fair price, or even give away my whole collection to serious collectors, preservationists or anyone interested enough. They …
... Set Willy Software Projects
BC's Quest for Tires Software ...So... you want to format your 3.5" as 720K eh?Well, i've been trying to get hold of an application to make proper use of my 3.5" +3 floppy disks but i haven't been able to find any. I stumbled up…
...
PUSH BC ; Preserve registers
LD BC,32765
... PAGE 7
POP BC
POP AF ; ... POP AF
POP BC ; Restore the registers used< ..."Floating" AY registersWhile I was working on some AY sample-related stuff, it occurred to me that with the AY port not being completely decoded, it would be a handy CPU-ti…
... to do something like LD BC,0xf8fd / OUT (C),B to ...New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…
...
djnz fillscreen
ld bc,0 ;initialise score
push ... l
moveright
ld bc,32766 ;read keyboard space to ... br /> ;wait routine
ld bc,$1fff ;max waiting time
;return score in BC
gameover
pop bc ;retrieve score
So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
BASin Assembler suggestionsHi Dunny. According to your former request here goes a few suggestions. Been playing around with the Assembler and I'm glad I did. Quite nice indeed…
... related note, why are the BC and DE labels bold?)[/LIST][BASin] Bug report and question[B]1. Bug report:[/B] BASIC Editor behavior I'm using a variable to store the contents of the BC register. But the BASIC editor works strangely. I t…
... store the contents of the BC register. But the BASIC editor ...Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... /> ld sp, (spp)
pop bc
ret
spp ... . But the contents of the BC register aren't being printed ... underscore) in place where the BC contents should be seen. What ...IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... />
pop bc
push bc
ld a,b ... br />
NoPrint pop bc
djnz BucTest
...New Spectrum Computer DevelopmentHey does anyone know of any decent new Spectrum clones being developed? I find it amazing how Zilog still produce a Z80 backwards compatible chip (an…
... , by extending most registers (HL, BC, DE, IX, IY, PC, and ...Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... ;Return to Basic:
ld bc,colour_map ;This puts the address ... ei ;Enable interrupts
ld bc,colour_map ;Give you the address ... the top border:
ld bc, 435
interrupt_delay_loop
... 04t => 008t
dec bc ;06t => 014t
...Tips on optimizing some newbie assembly routinesI'm starting to learn some assembly language. The best way to learn is to actually code something you are going to use, so I'm creating a very simple…
... hl
pop bc
ld a, c
._b1b
push bc
ld a, (hl)< ... pop hl
pop bc
ld a, c< ...How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…
... into the CPU registers AF, BC, DE, IX etc also? Or ...FLASH EPROM programming on ZXExist any other software for rewriting FLASH EPROM or EEPROM chips on real ZX ? I know only: EEPROM flasher for original DivIDE [url]http://85.132.…
... if verify ok
dec bc ;
inc b ;
l_5cf9 ... ;
ld c, h ; return BC value to basic
ret ...SPOT+SPEX magazine index update"This is precisely the sort of thing that no-one ever believes!" Firstly, a correction to the previous announcement. When I said "adding another 40 …
... /> AH -- Adventure: Dungeon Hack
BC --*Board game
IN -- Industrial ...Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…
Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
... (R_DE),de
ld (R_BC),bc
push AF
ld (G_BC),bc
push AF
ld de,(G_DE)
ld bc,(G_BC)
exx
ld de,(R_DE)
ld bc,(R_BC)
ld SP ...Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... at GAMEOVER insert line21, 'push bc; save score'. Replace line 57 ... with 'pop bc;retrieve score'
To cycle ... br /> ;wait routine
ld bc,$1fff ;max waiting time
gameover
pop bc ;retrieve score
pop hl ...Z80 assemblerIf I do this [code] LD BC, 0002h [/code] is B=0 and C=2, or the other way around? does it disassemble to 01 00 02 does it disassemble to 01 02 00
If I do this
[code]
LD BC, 0002h
[/code]
is B=0 and C=2, or the other way around?
does it disassemble to 01 00 02
does it disassemble to 01 02 00What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... ; address of string
ld bc,eostr-string ; length of string ...48k spectrum restarts by itselfFirst of all hello from a newb and thank you for your help. This site has already offered me a lot of insight. I have a 48k spectrum that will boot …
... to know if the BE BC and CE tests should be ...
