-
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... HL,16384d ; Start address of screen 210040
LD A, ... HL),A ; POKE bit to screen 77
INC HL ; ... to HL 19
POP DE ; Restore DE D1< ... ; Loop back 20F1
PUSH DE ; Store DE on stack ... from address ED52
POP DE ; Restore DE D1< ... -
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... HL,16384d ; Start address of screen 210040
LD A, ... HL),A ; POKE bit to screen 77
INC HL ; ... to HL 19
POP DE ; Restore DE D1< ... ; Loop back 20F1
PUSH DE ; Store DE on stack ... from address ED52
POP DE ; Restore DE D1< ... -
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... HL,16384d ; Start address of screen 210040
LD A, ... HL),A ; POKE bit to screen 77
INC HL ; ... to HL 19
POP DE ; Restore DE D1< ... ; Loop back 20EF
PUSH DE ; Store DE on stack ... from address ED52
POP DE ; Restore DE D1< ... -
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... HL,16384d ; Start address of screen 210040
LD A,85d ... 19 ****** THIS IS WRONG
POP DE ; Restore DE D1
PUSH DE ; Store DE on stack ... 5888d from address ED52
POP DE ; Restore DE D1
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... /> push de
push hl
push ix
exx
push af
push ... /> push hl ;106
sp7
ld sp, 0
pop ... clever and longer loop would copy 256B per iteration and update ...Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... ]'s suggestion I switched to POP/PUSH. As I said, it's ... fully aware of what the screen is doing at any one ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... HL,16384d ; Start address of screen 210040
120 LD ... ),A ; POKE bit to screen 77
170 INC HL ... to HL 19
230 POP DE ; Restore DE D1< ... 17 bytes 20EF
260 PUSH DE ; Store DE on stack ... from address ED52
300 POP DE ; Restore DE D1< ...Keyboard demoHere's a preview of a new keyboard for the special fx engine. Press any key to start/restart. [url]http://dl.dropbox.com/u/9498358/fire_keyboard.sn…
... or further up the screen when playing the odd ...
DRAWCH1: PUSH AF
PUSH DE
PUSH HL
CALL ...
DRAWCH2: PUSH AF
PUSH DE
PUSH HL
CALL ... br /> POPRET: POP HL
POP DE
POP AF
...SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…
... OUT commands. Also access to screen data is very easy from ... ) ; fetch current video paging
push af
in a ... -extended key pressed
pop af
out (vmpr),a ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... ) ;store CD_ADD
push hl ;in stack, so ... /> ld hl,Expression ;And copy my expression...
ldir ... later while evaluating.
pop hl ;Recover pointer to ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... returned in DE.
pop hl
push de ;Store address of ... copy the param block to the workspace.
pop de
push ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... a small Z80 stub to copy them to 65280, set the ... cares if some of the screen is corrupt. Cybernoid runs faultlessly ...
db 225 ; pop hl
db 209 ; pop de
db ... '
db 225 ; pop hl
db 209 ; pop de
db ...Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
... br />
[code]
SPRINT POP HL
LD A,(HL ... HL)
INC HL
PUSH HL
AND A
CALL SPRINT ; Do some screen printing
DEFB $16,0 ...emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…
... results in microsft blu
screen - this does nto havppen ... colours on a mode 3 screen - so well exaplained that ... one 16 colour mode 3 screen on sam - mind you ... long did it take to copy the 20kb video fram ... /> LD SP,screen_address
PUSH HL[/code][/QUOTE]Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... memory (8 KBYTES). Fortunately, on screen sprite X and Y postions ... a BYTE thus 255 on screen sprites on the Spectrum can ... /> mov ebp,ecx
push edi
lea edi ...
jne .count
pop edi
; ------------
< ...Why are speccy games so ****ing cool?I grew up with a spectrum and fell in love with it from a young age, so I may be slightly biased, but it seems to me that the look and feel of games …
... in your hands, a pristine copy and you see the cover ... town on the way back, pop into WH Smiths, lets sit ... pack of C90's i pop round my mates house who ... , i love watching the loading screen build up and then the ... games if he wants to copy any. Probably not but it ...Why are speccy games so ****ing cool?I grew up with a spectrum and fell in love with it from a young age, so I may be slightly biased, but it seems to me that the look and feel of games …
... in your hands, a pristine copy and you see the cover ... town on the way back, pop into WH Smiths, lets sit ... pack of C90's i pop round my mates house who ... , i love watching the loading screen build up and then the ... games if he wants to copy any. Probably not but it ...emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…
... on ehas managed to use push to get 16 pixels onscreen ... of the screen at a time?[/QUOTE]
As PUSH is ... , Speculator won't let you copy and paste text from the ... of the data, one correct copy of seperate small files and ...Printer Printing Problem (assembler)I've a program that outputs to the lower screen at various places, using a combination of calls to RST $10 plus OUT-NUM-1 and PR-STRING. It also call…
... are a number of lower screen display routines which I want ...
push bc
ld a," "
rst $10
pop bc ...
push bc
ld a," "
rst $10
pop bc ...Printer Printing Problem (assembler)I've a program that outputs to the lower screen at various places, using a combination of calls to RST $10 plus OUT-NUM-1 and PR-STRING. It also call…
... are a number of lower screen display routines which I want ...
push bc
ld a," "
rst $10
pop bc ...
push bc
ld a," "
rst $10
pop bc ...later today......[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs909.snc4/72268_172079126142549_100000213882336_641184_4866225_n.jpg[/IMG] [IMG]http://sphotos.ak.f…
... and so is the death screen :)
[QUOTE=Ralf;489549 ... there is an unpleasant, noticeable screen blackout for the moment (the ... slow). Any chance for faster screen redrawing routine? I also ... at screen buffering , maybe the next game I will try more pop/push ...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 …
... ; Prints characters directly to screen bypassing ROM calls
; ... print position
PUSH DE ; Save print position ... ; Set attribute
; -------------
PUSH HL ; Save print position
screen attribute
POP HL ; Get print ...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 …
... ; Prints characters directly to screen bypassing ROM calls
; ... print position
PUSH DE ; Save print position ... ; Set attribute
; -------------
PUSH HL ; Save print position
screen attribute
POP HL ; Get print ...Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... />
db 225 ; pop hl
db 193 ; pop bc
reg_sp ... />
pack_snapshot: mov edx,[input_buffer_ptr] ; Screen
add edx,SNA_listlen
; ------------
.copy: ldir ; Memory copy
.next: ld ...Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... br /> db 241 ; pop af
db 209 ; pop de
db ... 225 ; pop hl
... above method currupting the screen (this new method does ... ------------
lea esi,[z80_stub] ; Copy stub
mov ecx,STUBLEN ...New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... Spectrum memory map. The screen occupies the first 6912 ...
db 241 ; pop af
db 8 ; ex ... /> db 40,00Ch ; jr z,.copy
; ------------
; ------------
db 241 ; pop af
restore db ...New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... - Snapshot Batman on a blank screen to save more space!
copy
db 241 ; pop af
COPY
; --------------------------------------------------------------------------
[/code ...Converting TRD-Dos into TapHello, there are still many programs appearing on TRD-Dos or SCL format and users of normal Spectrum cannot run them. Of course I know about emulator…
... these files together by typing "copy /b code1.tap+code2.tap ... it:
[code]PUSH HL
POP IX
LD A ... a tap file
* Type "copy /b loader.tap+all_code.tap ... the whole lot together using "copy /b basic.tap+nearly_done.tap ...Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... pressed?
pop af
rra
push af
call ... /> here2 ld hl,(seed) ;screen address table pointer
dec ... 0
seed defw screen ;screen address table pointer, table below ... or before, sprite misses third screen segment later
defw ...Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... />
The demo clears the screen, builds the tables, runs bank ... ,a
put_blanksprite1 push bc
exx
pop bc
exx ... l,a
push hl
exx
pop hl
ret ... /> add hl,de
push hl
pop ix
ld a ...
