-
BUZZSAW+ Demo No. 3Right, another demo of BUZZSAW+. [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_3.tap"]Joefish_Buzzsaw_Demo_3.tap[/URL] The default con…
... seaching for every occurrence of 'LD A,0', 'CP 0' and ... timing sensible?
I am offering to find alternative coding ... -
Opcode QuestionsHi all, I am an experienced LabVIEW progammer and also have fond memories of the spectrum. Thus I started to think about writing my own emulator an…
... ,
I am an experienced LabVIEW progammer and ...
01 LD BC,nn
02 LD (BC),A
03 INC BC
However I am ... not entirely confident I am doing them correctly ... -
Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…
... is just terrible, as I am in the habit of writing ... . So if the command is "LD A,5" then the code ... -
Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... addresses in...
ld (32859),sp ; Preserve stack ... pointer
and
ld sp,(32859) ; Restore SP < ... br /> rather than ...
ld (stackptr_temp),sp
and
Am I correct in following that ... -
Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... addresses in...
ld (32859),sp ; Preserve stack ... pointer
and
ld sp,(32859) ; Restore SP < ... br /> rather than ...
ld (stackptr_temp),sp
and
Am I correct in following that ... -
MCODE problem...Hi Folks, Trying to write a simple machine code program to hatch the screen. So far I have the following but even this is not working - it does not…
... patter I am planning to use:
[CODE]LD A,FF ...
XOR B
LD B,A[/CODE]
where ... -
MCODE problem...Hi Folks, Trying to write a simple machine code program to hatch the screen. So far I have the following but even this is not working - it does not…
... do it to A:[code]LD A,B
CPL
LD B,A[/code]
As ... Mastering Machine Code book I am using. Very clever stuff - thanks ... -
IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... like:
[CODE]LD A,(FEF4h)
LB B ... )
OR B
LD (FEF4h),A
RETC
...
LD A,(FEF4h)
LB B ... )
AND B
LD (FEF4h),A
RETC[/CODE ... be in FEF4.
Am I missing something?
IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... like:
[CODE]LD A,(FEF4h)
LB B ... )
OR B
LD (FEF4h),A
RETC
...
LD A,(FEF4h)
LB B ... )
AND B
LD (FEF4h),A
RETC[/CODE ... be in FEF4.
Am I missing something?
Krakatoa not workingI can't get any of the Krakatoa files in the archive to load on spin or zxds. Anyone else had this problem?
... BC ;save counter1
5B23 LD B,10 ;16 attempts to ... BC ;save counter2
5B26 LD E,9F ;10011111 (159) bytes ... timings, overwrite ROM
5B2D LD A,0C ;Border green?
Am I wrong?
Shouldn ...Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…
... the problem.
[code]
LD A, $7F ; 94E2 3E 7F ... , they work in 128K mode. Am I being stoopid?
RAM:7359 3E 7F ld a, 7Fh ; '' ; SPACE, SYM SHFT ...Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…
... />
Only JetPac, Tranz AM, Lunar Jetman, Underwurlde and Cyberrun ... not crash?
[code]
LD A, $7F ; 94E2 3E 7F ...Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…
...
Only JetPac, Tranz AM, Lunar Jetman, Underwurlde and Cyberrun ... crash?
[code]
LD A, $7F ; 94E2 3E 7F ... /> ;
org $d03e
ld a, $f7 ; d03e 3e f7 ... /> ;
org $ba9e
ld a, $f7 ; ba9e 3e f7 ...Strange behaviour in real hardware but not in emulatorsWell, at least not in any emulator I've tried. I've been reported by fellow forum member Macc that both our Maritrini Monster Slayer and Retroworks'…
... this issue?
I am basicly clueless, and I've ... />
$9A7E
...
$9A8C LD B,$01
$9A8E CALL ... /> $9A91 CALL $C000
$9A94 LD B,$00
$9A96 CALL ... XOR A / LD I,A before the LD B,$01 and ... I to $FD after the LD B,$00 / CALL $8050 ...Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…
... ) {
#asm
ld e,l ; tile
ld l,6 ; instead ... ,_BIFROST_tilemap%256
ld l,a
ld h,_BIFROST_tilemap/256
am not sure is future proof ...Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…
... supports sections but I am not sure it ... by compiler-----
ld hl,sp1_CreateSpr ;; note the macro ... 0)
ld (hl),0 ; terminate token ... pop bc
ld a,h ; write next token ...28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... BiFrost. What do we think? Am I trying to crowbar a ... /> di ;set own interrupts
ld a, 254 ;i register looks ... ;white ink black background
ld de,17990 ;yellow ink black ... background
ld bc,17476 ;green ink black ...Store and restore attribute valuesI am needing ideas on how to write a machine code routine that will store/restore (more important to restore) attribute values to the 22528 area. I …
... =daveysludge;624135]I am needing ideas on how ... br />
I am only wanting to store/restore ... />
store_attributes
ld hl,22528 ;start of attributes ... br /> ld hl,attribute_buffer
ld de,22528
ld b,16 ... this recently so am in the habit.What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …
... compare the name I am looking for with the ... instructions:
ld e,(hl)
inc hl ...
ld d,(hl)
... br />
32768:
ld hl,60000
BCALL print_string ... ....
ret
I am running the code at 32768 ...Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
... a high degree. I am afraid that the road you ...
[CODE] org $82cd
ld a, ($00ed) ; 82cd 3a ed ... 82e3 c7 $0bts
l_82e4: ld hl, $8772 ; 82e4 21 72 ... 87 $0ats
ld de, $003c ; 82e7 11 ... 10 fd $08/$0dts
ld de, $9c22 ; 82ed 11 ...Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
...
org 32768
ld hl,(23670) ; randomize address: randomize ... next_address
put_defattr:
ld (hl),4*8 ; put default ... attribute
next_address:
ld a,b ; backup counter< ... to scroll attributes only, am i right? if it ...z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…
... set
ld hl,ENOMEM
ld (_errno),hl
jp ... br />
stdio_error_zc:
ld hl,0
scf
[code]
ld hl,len ; gather param from ... always a consideration while I am writing the new libs.
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... sorted already). I am willing to entertain ... strings ended simultaneously
ld h,a
ret ... ld e,c
ld d,b
ld c,l
ld ... b,h
ld ... l,e
ld ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... 7848
ld hl, $5b00
loop0 ld a, l
and %00100001
ld (hl), b
jp ... pe, loop1
ld (hl), c
loop1 ... QUOTE]
I am thinking about it....Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... /> l0 defb 62 ; ld a,33
st ld hl,$5b2b ; dec ... ,e
and l
ld (hl),c
call po ... ,$16ff ; use ROM for LD (HL),B
bit 3 ... .
Edit: I am wrong. LD A,N has the same ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... in .asm, but I am curious about the applications for ... ld a,(actualxcoord)
ld e,a
ld d,0
ld hl ... ld a,(xcoord)
ld d,0
ld e,a
ld hl ...
