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Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …
... /> Bit 3: Select normal (0) or shadow (1) screen to be displayed ... />
Bit 0: Paging mode. 0=normal, 1=special
Bit 1: In normal ... /> Bit 3: Disk motor; 1=on, 0=off
Bit 4: ... calling hookcode #11E:
1. OUT #7FFD, 0
2. OUT #1FFD ... -
Building a menu in ASMWEll as probably some figured, i am learning asm at least to make the basic menu i did in basic. It is a menu where we can select games to be loaded.…
... game. Example:
1 - Alien 8
2 - ... ",$10,7,$11,1,"01",$10,0,$11,7," Alien ... ",$10,7,$11,1,"02",$10,0,$11,7," Knight Lore ... ",$10,7,$11,1,"18",$10,0,$11,7," The ... paint the alternate lines 0,2,4 that are ... the other alternate lines, 1,3,5, then i ... -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... Bit 0 - if 0 from 0000h address ROM is placed. If 1, ... .
Bit 1 - Management of the protected mode ... . If 0, protected, the mode is ... disconnected. If 1 the protected mode is included ...
A=1 for RAM 0,1,2,3
A ... -
Help me understand ZX RGB signal (long)This will be a long post so please bear with me and most importantly help me. I have a 128K+ and +2A that I'm trying to get working with my 15kHz RG…
... /> Signal Requirements:
RGB: 0.7vpp 75 ohm
composite ... Signal Requirements:
RGB: 0.7Vpp 75 ohm
... /> RGB: 0-5V TTL
Composite: 1.2Vpp 75ohm
+2A
RGB: 1.67Vpp 75 ohm
Composite ... the voltage from 1.67V to 0.7V. It ... -
A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... /> __DRAW1:
ld (DX1 + 1), hl ; Updates DX1 call address ... Replace with CPL if INVERSE 1
__PLOTOVER:
... (hl) if OVER 1 AND INVERSE 0
; Replace ... with AND (hl) if INVERSE 1
A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…
... required pulses for a '1' bit or '0' bit within the byte ... the carry to the bit 0 of L, and the bit ... is executed, a '1' is loaded into bit 0 of L.
0.
So, everytime we executed ...Micro PowerJust google mapped Micro Power to see the old [URL="http://maps.google.co.uk/maps?q=ls71ad&ie=UTF8&hq=&hnear=Leeds+LS7+1AD,+United+Kingdom&gl=uk&ll=5…
... ;ll=53.806708,-1.535532&spn=0.006576,0.01929&t ... =c&cbll=53.807168,-1.535035&panoid=1FQeP28sxGz6Dp5P_PV2Vw& ... ;cbp=12,255.47,,0,-18.23"]building[/URL], it ...Lerm Tape Utility CHi folks, These Lerm tapes are doing my head in. Through the years I've aquired lots and lots of samples of these, but never been able to make a cl…
... .
There's a 1 or 0 ms pause between the blocks ... in this case have a 1 or 0ms pause and use ...
Sync 0 = 667 : Sync 1 = 735
Bit 0 = 856 : Bit 1 = 1712 ... values should follow the rule 1 = 0 * 2 or not ?
Sometimes ...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…
... using Fuse for Windows 1.0.0.1, ZX Spin 0.7 and two actual ... , unmodified +2A machines.
[b]1 ...Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…
... follows:
[LIST]
[*]base+0 = DWORD containing value of variable ... follows:
[LIST]
[*]base+0 = pointer to string
[*]base ... /> [CODE]start NOP
+1 LD HL,0
+4 LD (59346 ...Google Earth.Google Earth/ maps satellite view is fascinating I could spend hours on it. There are just so many weird and unexplained mysteries within in it. L…
... ;ll=51.894606,-1.233269&spn=0.002572,0.006866&t ... ;ll=51.913673,-1.271582&spn=0.010232,0.027466&z ... ;ll=52.136109,-1.484249&spn=0.010233,0.027466&t ...Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…
... shadow ROM in the Interface 1 emulation is paged, the ... SAVE *"m";1;"rom" CODE 0,16384 : LOAD *"m";1;"rom" CODE ... />
StartCopy ld hl,0
ld de,32768
1 partially decodes the shadow ROM ...128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…
... apply contention if ULA14 = 1 and ULA15 = 0.
Now fusetest ... all the tests!
1. Can someone describe accurately the ...The Only Way is EssexLenny Henry, since his dalliance with a blonde in a hotel, has been regularly recommending that I stay in a Premier Inn for ?29. Well I checked out …
... ;ll=51.614662,0.299461&spn=0.000893,0.002642&sll ... =54.729737,-1.883353&sspn=0.006579,0 ... =c&cbll=51.614822,0.299498&panoid=oC3paIvIA0D1ZgvOpGa7JQ& ... ;cbp=12,298.8,,0,-15.85[/url]z88dk hates me =(Hello there my fellow WoS'ers Under the power of darkness I was about to settle in and play with some SP1 sprite handling (as printf is simply NOT f…
... />
clear_screen(7,0);
print_at( 1,1,6,0,"Initializing Menu System ... items */
{
store_menu("Option 1 \0", 10, 7, cyan, black, white ...FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…
... f(2,FN f(3,1)),4)[/code]
1)) is yielding the result ... f(2,FN g(3,1)),4): REM works!
... g(2,FN f(3,1)),4): REM works!
... f(2,FN g(3,1)),4): REM works!
... f(3,1)),4): REM works!
100 PRINT FN ... g(FN g(2,FN g(3,1)), ...Why are the same size memory cards different sizes?I've heard before that two memory cards or USB sticks can have the same official capacity, but be different capacities in reality, and I'm not talkin…
... (2).txt
1 File(s) 0 bytes
0 Dir(s) 2 ... ).txt
1 File(s) 0 bytes
0 Dir(s) 1,962,856 ...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…
... ,2,0}, {0,96,120,2,0},
{0,96,56,1,1}, {0,160,88,2,0}, {0 ... ,160,120,2,0}, {0 ... ,160,56,2,0}, {0,0,0,2,0 ...The curious case of the vanishing zerosRight, I'm back for more help guys This time I think I've figured out the code ok....but still it fails - well it works but only once... Basically …
... ]0[/B][I]0[/I]011000
180 POKE USR "p"+1,BIN ... [B]0 ... [/B][I]0[/I]011000
190 POKE USR "p"+2,BIN [B]1 ... USR "p"+7,BIN [B]0[/B][I]1[/I]000010DATA vs PRINT and OVERjust messing about and came across this alternative way of drawing a map....now before I start mucking about with my actual program.....is there any …
... ?
10 INK 0: PAPER 4: BORDER 4: CLS ... 1000
30 FOR m=1 TO 3: READ a$: PRINT ... AT m,1;a$: NEXT m
1000 ... can) despite trying a OVER 1 and OVER 0 type instructionHardware for SaleI've had a bit of thinning out session this afternoon. Thus some hardware and accessories for sale. [url]http://www.ebay.co.uk/sch/fredmysterio/m.h…
... =zx&_sacat=0&_sop=1&_dmd=1&_odkw=& ... ;_osacat=0&_trksid=p3911 ...Interceptor by Ediciel, uMIA (France)As per this page: [url]http://download.abandonware.org/magazines/Tilt/tilt_numero017/TILT%20-%20n%B017%20-%20decembre%201984%20-%20page072%20et%20pa…
... [/url]
1 or 2 players, 100 Francs as original price ...number padding functionI wrote a number padding function in BASIC a while ago, but when I came to want it again I couldn't find it, so I've done this enhanced [url=http://w…
... p$(1,0,0) := "1"
FN p$(1,0,1) := "1.0"
FN p$(1,-5,3) := " 1.000 ... "
FN p$(1,-5,0) := " 1 ...Developing apps for ZX Spectrum with SDCCDue to troubles with makebin utility which always starts coversion at memory address 0x0000 and can only produce binaries < 32KB, it can't be used to…
... RANDOMIZE USR 32768.
1) Makefile
[ ... .area _BSS
store_sp: .word 1
;; 1024 bytes ... /> {
int ret = *((*p)++) - '0';
if (ret > 9 ... {
ret -= 'A' - '9' - 1;
}
return ret;
UDG in AssemblyHow do you create User Definable Graphic and move it around the screen? In C64 its as easy as: [code] SPRITEENABLE = $d015 SPRITEPOINTER = $07f8 =*…
... /> ; enabling it (1= sprite 0, 3 = sprite 0, 1, 7 = sprite 0, 1, 2 etc)
sta SPRITEENABLE ; turn on sprites 0 and 1
; then pointing ... ; set sprite pointer for sprite 0
; setting it's ...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…
... 84,56
defb 0,100,100,8,16,44,44, ... defb 0,0,0,120,84,84,84,84
defb 0,0,0,88,100,68 ... ,68,68
defb 0,0,0,56,68 ... defb 0,0,0,56,72,56,12,8
defb 0,0,0,88,100,64 ... ,64,64
defb 0,
uglifruit
August 2012
Development
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... the goodies) CPLD is almost 1.5 times the cost of ...
Isolation resistors (about 30): 0.04 EUR. (if buying a ... -about 6 EUR- )
1.2V regulator: 0.6 EUR EUR
2.5V regulator: 0.92 EUR
[B]FPGA ... a power knob counting from 0 to 10, so I don ...Ideas for speeding up this BASIC routine?This loop can take up to 2 minutes to run, depending upon the content of the screen being scanned, about 70% of that time being taken up by lines 105…
... =tri TO tri-ml*my+1 STEP -my
1051 IF ... =0
1053 FOR z=y TO (y-my+1) AND my+1
