-
using the out command to make sound on a spectrumi remember reading somewhere on how to use the out command to make sound. i cant find a reference to this anywhere online. i think it may have caused…
Bit 4 of port 254 ($fe) toggles the loudspeaker. Bits 0- ... 2 of the same port controls ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... /> ld a,5 ;
out ($fe),a ; border change
ld ... attr into D, MSB of port addr into E
l3 ... ,e ; [4]MSB of port addr into A
in ... a,($ff) ; [11]read port 0x40FF into A
cp ... /> ld a,7 ;
out ($fe),a ; border change
ld ... -
Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
...
LD C,&FE ; C is always FEh ... HL) ; Get the keyboard port address from table
INC ...
LD C,&FE ; C is always FEh ...
LD C,&FE ; C is always FEh ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... ld a, (bdr_colour)
out (#fe), a
ENDIF
halt ... br /> ; ld a, port
; in a, (#FE)
; to do the ... read of the port
; ... ld a, (bdr_colour)
out (#fe), a
ret
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... ld a, (bdr_colour)
out (#fe), a
ENDIF
halt ... br /> ; ld a, port
; in a, (#FE)
; to do the ... read of the port
; ... ld a, (bdr_colour)
out (#fe), a
ret
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... 00
gfx16x16_wall db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
... , #00
db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
... db #FF, #FF, #7F, #FE, #7F, #FE, #3F, #FC
db ... #FA, #02, #FE, #00
wall_sprite db #FE, #AA, #FE, #00, #EF ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... , #00
gfx16x16_wall db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
db ... , #00, #00
db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
db ... wall
gfx16x16_exitN db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
db ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
gfx16x16_wall db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
... db #FF, #FF, #7F, #FE, #7F, #FE, #3F, #FC
db ... wall
gfx16x16_exitN db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... key is being pressed
; #FE - SHIFT, Z, X, C, ... br /> ; ld a, port
; in a, (#FE)
; to do ... the read of the port
; ... #7F
in a, (#FE)
bit 0, a
in a, (#FE)
bit 1, a
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
gfx16x16_wall db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
... db #FF, #FF, #7F, #FE, #7F, #FE, #3F, #FC
db ... wall
gfx16x16_exitN db #FE, #FE, #AA, #AA, #FE, #FE, #00, #00
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
main, mainloop, read keyboard and update player
[code]
ORG 32768
main:
IF NOPS_AT_START
nop
nop
nop
nop
ENDIF
IF RETURN_TO_BASIC
ld (stashed_iy), iy
...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... key is being pressed
; #FE - SHIFT, Z, X, C, ... br /> ; ld a, port
; in a, (#FE)
; to do ... the read of the port
... #7F
in a, (#FE)
bit 0, a
in a, (#FE)
; are we pressing K ...Why so few open source Spectrum emulators?A couple of days ago I started to look into converting an existing Spectrum emulator to Pocket PC (mainly the iPaq) and ran into problems directly. T…
... .e. make it easy to port to any new platform). It ...Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …
... humble Speccy, via the parralel port. The program should be able ... has a bi-directional parallel port.
I found out ...Kempston InterfacesWhat Kempston Interfaces featured an additional expansion port on the back, so that you could fit other devices on, such as the Currah microspeech et…
What Kempston Interfaces featured an additional expansion port on the back, so that you could fit other devices on, such as the Currah microspeech etc?Kempston Interface/Games cartridge portI recently bought an original Kempston joystick interface which features 3 rather nifty joystick ports (1 kemp, 2 sinclair) and a little slot which i…
I recently bought an original Kempston joystick interface which features 3 rather nifty joystick ports (1 kemp, 2 sinclair) and a little slot which is marked for a games cartridge... I was wondering if this is the same sort of cart which was used in the ...Programing/iterfaceingsorry about my spelling. I have looked for a long time on the internet and havent found anythink about programing the expation port to drive l.e.d.s …
... anythink about programing the expation port to drive l.e.d ...IF1 and IO portsThe Interface used 3 Z80 IO ports to communicate to it s devices #E7- Microdrive data #EF- Status and control #F7- RS232/Network What I'm looking…
... .
Which bits in what port are responsible for what device ...48 K SpectrumHi. I have 1 off 48 K Spectrum + PSU, Romantic Robot I/F, Opus 3.5 Disk Drive with Printer Port ALL WORKING plus many Games/ Utilities on Tape and D…
... .5 Disk Drive with Printer Port ALL WORKING plus many Games ...Spectrum +3 disk transfer help neededI am trying to transfer some stuff to my +3... I was wondering which programs I'd need on the PC (if they exist) to write to 3.5" disks for the +3, o…
... could transfer through the Tape port)...
Any help apreciated ...Chuckie Egg and joypads on the SpectrumAn old favourite of mine is "Chuckie Egg", but it has no joystick option. I've got a dual port DK Troniks interface, the first port takes IN 31(Kemps…
... . I've got a dual port DK Troniks interface, the first ... port takes IN 31(Kempston) and ...SPIN Update 0.1a (beta) availableHi all, The latest beta of SPIN is up (a new ZXSpectrum emulator, in case you've not heard of it before - it's not bad, IMHO :), and available fo…
... speedup in the Z80's port read routines
Many parts ...Spectrum 16KI know there must be some of you that still use the original 48K rubber keys machine, and other that have the 48K+, or the 128K(me). But is there any…
... 32K rampack in the expansion port? It's unlikely given how ...SPIN V0.2 Now Available[Standard CSS cut'n'paste message] Hi all! Well, again another update, but we think this one's well worth it. There's numerous additions and fixes,…
... fixed - broken due to new port behaviour
+3 Paging bugs ...Where has ramsoft gone?Not Found The requested URL /realspec.html was not found on this server. Apache/1.3.22 Server at [url="http://www.tattoopower.net"]http://www.tattoo…
... "]http://www.tattoopower.net[/url] Port 80
//////////////////////////////
Have the ...Realtime Tape Loading, Windows Speccy EmulatorHi folks, I'm very impressed by the amount of Windows Speccy Emulators that have been popping up this year !. What with Spectaculator, ZX SPIN, and…
... tapes via the line-in port ? Also it would be of ...Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
... not entirely sure how to port a compiled binary into an ...
