-
How do you restrict this routines actions?I'm trying to plagiarise a piece of code I came across in the 80's, but seem to be banging my head against a brick wall! The routine fades the scree…
... of code I came across in the 80's, but seem ... )
ld b, a
bit 6, a
jr z, l_b7a5 ...
res 6, a
jr l_b7ca
l_b7a5: set 6, b
ld a, b ... -
new esxDOS beta 0.8.4I've made a video of the new esxDOS beta firmware version 0.8.4 kindly sent to me by Phoenix^ra a couple of days ago for testing. The main new featur…
... /> This disk system was made in the UK but hacked by ... its only 4 bytes. if bit 6 is not set the +3 ... which fill the entire RAM in one go.
Phoenix ... PC to speccy mode once in a while! It's a ... -
Problem with DIY Kempston Joystick InterfaceHello, Decided to try out Yarek's Kempston joystick interface: [img]http://8bit.yarek.pl/hardware/zx.joystick/kjschem.gif[/img] Having a few issues.…
... movements.
I noticed in his diagram there is no ... , also, how does the bit 7, bit 6, bit 5.... exactly work here?
Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... OUT 7FFD,xx are bit D4 saved also in BETA128. State of ... this bit is used for ... = unused (ignored)
bit 6 = data request
bit 7 = interrupt request
Here is addressing in original BETA DISK 128:
SkoolKit 3.6SkoolKit 3.6 has been released. In case you are unaware, SkoolKit is a set of command line utilities (written in Python) for disassembling Spectrum …
SkoolKit 3.6 has been released.
In case you ... command line utilities (written in Python) for disassembling Spectrum ... the #R macro in annotations, and automatically in the operands of ... from graphic data in the snapshot (new in 3.6)
[*]from ...A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... this loader for 128k games in +3DOS.
... ; this definitions can be used in other +3DOS routines
... a,(iy+0)
bit 7,a ; is the ... ..2 Page to put in $c000
; 6..3 Reserved
... /> ; 2 bytes starting address in memory
; 2 bytes ...Intel x64 vs Zilog Z80Just been having a gander at the x86 CPU Architucture here: [url]http://software.intel.com/sites/default/files/m/d/4/1/d/8/Introduction_to_x64_Assemb…
... it humbling that despite advances in processors, the roots of Intel ... CPU can still be found in the position of the flags ... this register: CF = Bit 0, PF = Bit 2, ZF = Bit 6, SF = Bit 7 etc...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 …
... interface?s PS/2 socket, in place of a mouse, ... standard 48k ROM routines , in parallel with the ZX Spectrum ... #DF, with following bit assignment:
Bit 0-5 Key number ... ?no key?
Bit 6 Symbol Shift
Bit 7 Caps Shift
LOAD "" CODE in machine code/store 128 bank dataHow do you LOAD "" CODE from machine code? I have written the following MC routine that fits into a REM statement in a basic program. I want to cal…
... fits into a REM statement in a basic program.
in bank 6?
[CODE]ld ...
;LOAD 128 bank 6 code
;LOAD main ...I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…
... the screen and one pixel in. So with that, I'm ... Accumulator, I think, pointing to bit 6 (does this mean A=64 ... />
So I'm a bit confused why the code places ... 'm not using the Accumulator in the right way am I ...Detecting TR-DOS w/o relying on system variablesOK, I know it's much easier to do this simply by checking whether the BASIC program area has moved or some specific pattern in the sysvars etc (somet…
... or some specific pattern in the sysvars etc (sometimes ... see what this does in the comments. Is there ... xor a ;- "NOP: RET" in TR-DOS ROM (any version ... .xor_lp ;- Sinclair font data in 48 ROM
xor ( ... under normal conditions.
bit 6,h ;If it's ...New Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike DaillyNew Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike Dailly (Found on SpecNext Facebook-Page) Info and Download (=klick "CSpe…
... F6 - 7Mhz mode (when not in debugger)
F7 - 14Mhz mode ... (when not in debugger)
F8 - 28Mhz mode ... (when not in debugger)
... 2 behind Spectrum screen
bit 6/7= VRAM Banking selection ( ...New nmi menu 1.6 for MB-02+Dear MB-02+ users, it's been 10 years since my last release of nmi menu. Now, after 10 years anniversary I am releasing brand new version, 1.6. [i…
...
What's new in 1.6?
Well, ... partial configuration of nmi like in 1.35
< ... freed up some space in BSROM and BSDOS by reorganising ... nmi routines
6) native Alasm as a ... Profi Interface support- brings in lots of new features
Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
... is long and seems a bit cumbersome.
... draws a character square sprite in the bottom right and ... /> ld a, (de)
bit 0, a
jr z ... b1: ld a, (de)
bit 1, a
jr z ... b6: ld a, (de)
bit 6, a
jr z, b7 ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
...
ld a, 64 ; set bit 6 in A
; forget we were ... /> ld a, 128 ; set bit 7 in A
; forget we were ... /> set 7, c ; set top bit in C
and ~1 ; mask ... , .getkeyval
set 6, c ; set 6th bit in C
and ~2 ...Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …
... R are picked up in the bits 6..0 of the screen ... snow effect — in the pixels1/attributes1 addresses the bit 6..0 of address ... it should already be increased in this operation code fetching cycle ... — Pixels and attributes are read in «bursts». First the CAS signal ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... Find_bit
8017 2B 6 DEC HL ; Move ...
; bit 0 of previous byte in bit 7. Carry
802B 23 6 INC HL ; Increment ...What is a Kempston joystick?Just a quick question from an ignorant Commodore user (what, a Commodore user on this sacred ground? Relax, I'm a fan of all 8-bits, including the wo…
... the tapeinput (IN 251) or the keyboard (IN 254, in combination with ... the value in A). Every other IN-adress was in ... fact free. Later IN ... to anything with bit 5 reset (and maybe bit 6 and 7 ...a poke to change fonts??hi ppl, there wasnt some poke in basic to change the look alike of the fonts of speccy?? I guess I did things like that in eighties.. also, there…
... changes the standard font in ITALICS or BOLD, just ... font and change the font in the following way
6/7 : shift 1 bit left
8 ... /> Bold:
Test if Bit 1 is set, if so ... set, if so set bit 6
and so for ... your font is BOXED-IN !!!My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... them (my last project in electronics was an inteligent ... come back to me in about 6 months - this is exactly ... BASIC - that's a bit old hat - some sort ... has been astounding progress in miniture display technology - quality ... sizes for an 8 bit device (it would be ..."La Abad?a del Crimen" - English versionOK, I've started a new thread for this, as the discussion about "La Abad?a" in the [url="http://www.worldofspectrum.org/forums/viewtopic.php?mode=vie…
... easy to find, too. However, in general, you have to obey ... , as you're their guest in the abbey. That's what ... , you're out on your ear. In fact, I managed to complete ... you. You get a whopping 6% for that! :)
But ...Damn, this sort of thing makes me angry.[url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=3038531795&category=11994"]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=3038531795…
... i think is a bit of hypocrisy on the ... also that attitude is a bit like the "ooh I' ... everyone hated in school/childhood, and even in adulthood. come ... viewed what I said in completely different light than ... with the permissions project in its 6 year running?[/quote]< ...Fire Ruby - More HelpI cant pass the spikes in the fire ruby by lawrence creighton, can someone please help? [ This Message was edited by: welsh_brawler on 2003-08-08 21…
... Wally, "probably worth quite a bit."{6}Having thus offered his opinion ...
{16}{6}"But you still have a bit in{6}there" opines Wally ... in golden{6}doubloons. This was, however,{6}unknown to you.{6}{6}{6}{16}{4}{6 ...bug in spectaculator? Hi Jon, While testing the AMX mouse emulation in Spectaculator I noticed that the mouse buttons don't work. My program reads port $df to detect mo…
... hardware can return a button in the "down" state when it ... as there's not enough in there at the moment.
bit 6 to correspond to the right ...bug in spectaculator? Hi Jon, While testing the AMX mouse emulation in Spectaculator I noticed that the mouse buttons don't work. My program reads port $df to detect mo…
... the left mouse button and bit 6 to correspond to the right ... this :)
[/quote]
In the UK, the AMX mouse ... are assigned to bits 7, 6, and 5 of port 0xdf ... button is down, the corresponding bit should be 0.
Things wrong with gaming today: No. 437One thing that irritates me about games in the modren era: I played "Midtown Madness 3" on the Xbox recently and also had a quick go on "The Italian…
... my PS2 was gone in about 6 months.
I don ... been staggering advances in graphical sophistication, sound, in-game physics, ... the game industry is in the dark ages.
bit of fun?
... a life, friends, interest in the arts etc, but ...Text compressionI'm sure I remember seeing a short machine code routine published in a (very random) multi-machine listings magazine way back in the mists of time, w…
... all characters can be made in 4 * 6, leaving 1 row at ... and M are a bit difficult to make in 4 width.
Loading programs directly via SoundblasterLet's just hope this does not sound too silly (I'm a newcomer)... Is is possible to connect a real Spectrum's MIC port to the audio out port of a Sou…
... ! The plugs were both identical in every respect. It was the ... " IIRC, which carried over to bit 6 of port #fe - but don ... ROM itself only loads from bit 6, not bit 5 and so your ...Z80 coders compoIf you're interested in Z80 coders compo, visit my page [url="http://mbr.nm.ru/compo.html"]http://mbr.nm.ru/compo.html[/url]
... n, an 8-bit number:
; 7654 3210 (bit positions in n)
; bit 4 contributes '6' (16)
; bit 5 contributes '2' (32)
; bit 6 contributes ...
.loop ; convert BCD digits in lowest four bits to ascii ...
