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Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... right - the block of 0xFF bytes from 0x386E to 0x3CFF was ... , this bit of ROM in 48 mode had differences between all ... -
converting mp3 to zx importfile.is it possible?Hi peeps I am just looking through old threads and browsing through music tools on the zx in particular converting or creating ,what i am looking for…
... followed by parameter
bytes. These can be on ... Command byte Number of parameter bytes Meaning
000h 1 ... the pitch in semitones; 48 is middle C.
... first and second parameter bytes should both be set< ... /> The 2 parameter bytes are the address of ... -
A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
[QUOTE=Timmy;594378]Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how easy it actually is. (Actually I've already published this one some time ago, but this ... -
Code optimisation - can you help?Hi Folks, I have been looking at the following code fragment for days and I have been able to improve its performance quite a bit. However, it is a…
... hi/lo halves of composite bytes are held separately and don ... -
Code optimisation - can you help?Hi Folks, I have been looking at the following code fragment for days and I have been able to improve its performance quite a bit. However, it is a…
... hi/lo halves of composite bytes are held separately and don ... -
rotating HL left through CarryI've tried this several ways, and it works for a while, then a particular value has a bit set in an inconvenient place and it all goes to pot. Eg: "…
... fill a table with 256 bytes with a function that swaps ... $12->$21, $84->$48. So the table is:
BUG in zxspin and SpecEmu - read Loading speed in WAV fileI'm created a new save, but it can run at 44.1 KHz, to test it, i make a new file from WAV 44.1 KHz to 88.2 KHz. Load this file in a emulator zx-spin…
... (1)
5-. OTLA 48 KHz 12000 bps - 4 short ... pulse
6-. OTLA 48 KHz 12000 bps - 5 long ... slowly
I have 48 speeds for this loading scheme ... this encode (128 or 256 bytes)
All basic ... />
In PC output at 48 KHz
3500000 / 48000 = ..."More tea Vicar?" on gray +2 with divIDEDid anybody try to run "More tea Vicar?" (128k version) on gray +2 with divIDE? On my machine game loads but crashes after joystick selection.
... ROMs. These are the original 48 BASIC ROM (so things that ... 128 editor ROM with three bytes changed to enable it to ..."More tea Vicar?" on gray +2 with divIDEDid anybody try to run "More tea Vicar?" (128k version) on gray +2 with divIDE? On my machine game loads but crashes after joystick selection.
... ROMs. These are the original 48 BASIC ROM (so things that ... 128 editor ROM with three bytes changed to enable it to ...Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... (sp_cache), sp
REPT 48, attr ; write the attributes
push hl ; write 16 bytes
push de
... /> incbin "screen.bmp" ; 6144 bytes of in order bitmap
incbin "screen.atr" ; 768 bytes of attributes
org ...Question about 2-channel beeper musicI confess I haven't tried all the available beeper utilities and software. I always found music software confusing and trackers are not for me. I kno…
... -states (12 low, 24 mid, 48 high-bit), the fastest I ... -boundaries (eight samples per three bytes) but the end result was ...Trident PD TapeI've been going through a tape and found that its the contents of the Trident PD tape. What is the preservation status of this ? I would have to h…
...
10- B841: Bytes : REMOVER Length: 19 Normal ... Pause: 0.830s
48-1BF67: Program : cartmend Length ...
56-1FDFC: Bytes : format Length: 19 Normal ...
78-2A107: Bytes : CLOCK Length: 19 Normal ...Trident PD TapeI've been going through a tape and found that its the contents of the Trident PD tape. What is the preservation status of this ? I would have to h…
... 826s
4- 8B: Bytes : weirdchars Length: 19 Normal ... 826s
6- 4AA: Bytes : quadrajoin Length: 19 Normal ...
10- 5BA2: Bytes : SPIN# Length: 19 Normal ... Pause: 0.828s
48-32FC3: Program : scroll.bas ...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 …
... pe, loop1
ld (hl), $48
loop1 dec hl
17 bytes with a return added, and ...BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... to say that on the 48 you can't update an ... of the screen. But the bytes in the colour buffer are ...Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... me as it begins with "Bytes:" instead of the usual "Program ... how?[/QUOTE]
Select 48 Basic at the menu and ...Switching 48/128 modes within a BASIC programI'm not sure what use this would be; ie. being able to switch between 48k and 128k modes and back again from within a continuously running BASIC prog…
[QUOTE=aowen;641596]If 48 basic clears the print buffer ... one could copy those 256 bytes to a safe area before ...Spectrum Emulator that supports low resolutions and runs smoothlyHello to All, I have been trying to find a spectrum emulator that will work well through my CRT TV (using RGB to Scart) Most emulators seem to supp…
... also true: the last four bytes needed to display the last ... right and left border are 48 pixels each.
This ...Switching 48/128 modes within a BASIC programI'm not sure what use this would be; ie. being able to switch between 48k and 128k modes and back again from within a continuously running BASIC prog…
... working. It's about 30 bytes longer than Toggler, but ModeSwap ... /32)*2:
LET mode=48+bit4*80: PRINT AT 0 ...
9129 DATA 48+83,4867,48+65,4867,48+233,4867,
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... + 64 lns + 192 lns + 48 lns = 320 lines
bytes. Also 17 T-states ... for instance adding 2 more bytes per iteration (total of 144x2 ... =288 bytes) to waste another 17 ... space for 288 extra bytes even if I sacrificed ...The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... different interrupts (addresses take two bytes and so can't overlap ... possible. SE BASIC preserves the bytes pairs of 0xffff at 0x38ff ... you're writing for the 48 you may as well use ...Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... snapshot in SNA format. 49179 bytes assumed. No error
checking ... ROM file.
Default to 48.rom in the current directory ...divide loading errorsHi All, Just bought a divide unit and I am having a few problems. I select the TAP file from the fatware browser, then do a load "". I get a lot of …
... ROM set is the original 48 BASIC (so you can load ... UK 128 editor with three bytes NOPed out to enable it ... to work with the 48 BASIC. That will give you ...divide loading errorsHi All, Just bought a divide unit and I am having a few problems. I select the TAP file from the fatware browser, then do a load "". I get a lot of …
... and you will find three bytes changed (to NOPs). diff SE ... -1 against the original 48.ROM and you will find ...Custom Spectrum ROMS with modified system fonts?Some of the more memory efficient adventures used the default Spectrum font in order to save bytes for the adventure itself. Level 9 in particular ju…
... file from that address 768 bytes in length. Then use a ... the last 768 bytes at the end of the 48.ROM or ...Has any one tried ZX Spectrum 4.net?In this week's Micromart, the Specccy emulator [I]ZX Spectrum 4.net[/I] is given a rave review, and it does sound really good. Has anyone tried it ye…
... two copies of the original 48 ROM and two copies of ... UK 128 editor with three bytes changed. I came up with ...ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... port 7FFD
;now is 48 LOCK acive only after correct ... /> ;free space #3B00-#3CFF = 512 bytes before TR-DOS map area ...Type-in Checksum PuzzlerAt least one of the hex dump type-ins at [url=http://www.users.globalnet.co.uk/~jg27paw4/type-ins/typehome.htm]TTFn[/url] has a checksum routine a cu…
... =0
90 INPUT "Enter bytes:";LINE h$
100 IF ... byte=16*(CODE h$(1)-48-(7 AND h$(1)> ... ;"9"))+(CODE h$(2)-48-(7 AND h$(2)> ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... , 1
defb 210 ;3 bytes nop (JP NC)
exo_setbit ... exo_dontgo
ld de, 512+48 ;1?
dec c
