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Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…
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The ULA input port is 0xFE and when this ... of the address lines and reading the ULA keyboard inputs you ... -
Kempston detectionI could use some help. This Kempston joystick behaviour drives me mad. I've written a game called Necrospermia recently ([url]http://www.worldofspec…
... puts "random" values on IN31 port and some of them simulate ... detect KJ is: If the port reads only zeros for 1 ... it is not connected and reading it will return garbage. -
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
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This instruction is reading from port $EC instead of $FE ... , which AFAIK will read from port $FE but ignore all pressed ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
[QUOTE=Einar Saukas;624143]Reading from port $FE produces different results ... />
[LIST]
[*]Input port $FE bit 7: always value ... :
[LIST]
[*]Input port $FE bit 7:
[ ... br />
[*]Input port $FE bit 5:
[LIST ... -
Ay Real Time Synthetizer SoftwareSpectlemen and Spectladies!It's been a long time that I'd like to ask this.... I ask thee to create a new musical software for our ZX Spectrum machi…
... been doing a lot of reading and research today in ... "bit-banging" I have been reading about recently? :D
< ... little information regarding the RS232 port MIDI capabilities. Certainly there is ... out interface (using the network port?) [/URL]
[URL="http ... -
Dizzy Returns on Kickstarter[url]http://www.kickstarter.com/projects/theolivertwins/dizzy-returns[/url]
... .
[b]The iOS port of POTYF was naff[/b ... (no offence if you're reading this Philip) it's not ... certainly make it trivial to port to those systems though.
New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…
... , or some input on MIC port. All of the IN tests ... =Paddy Coleman;668795]Am I reading this correctly... are you saying ...No tea vicar on MB02Hello Folks, I have difficulties in getting "More tea vicar" (the free 128k version) running on the MB02. The game starts and you can choose control…
... />
Yes. Here is port collision between MB02+ and ULA ... ULA+ port then will runable on real MB02+. Only reading from ULA ... /> Here is schematic with MB02+ port adress decoder:
[url]http ... then MB02+ return on port #3B(ula+ port) undefined value (can be ...The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... /Pag(4/5)
#7FFD/32765 0111111111111101 0xxxxxxxxxxxxx0x - Pag(2 ... port)
Brd - ď?đň ??đ?ţđŕ (border port)
Key - ď?đňű ę?ŕ?čŕň?đű (keyboard port)
Kjoy - ď?đň ęĺěďńň?? ?ć??ńňčęŕ (kempston joystick port ...RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…
... a,($5b5c)
ld bc,$7ffd
push af
push ... think that bit 2 of port $1ffd should be SET to ...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…
... .
This game use reading from port #FF (attribute port).
Original game ... on ZX models/clones with port #FF.
Here is ...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…
... GUNNERS. This game use reading from port #FF (attribute port). Same problem as ... /+3/Pentagon models (not use port #FF). I copy this patch ...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…
... main site mentions disk streaming, reading sectors is easy at least ... a Z80. If a programmer port it to Z80, it will ...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…
... = as first set port #1FFD and later set #7FFD. One of this ... A,#10
LD BC,#7FFD
OUT (C),A
Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... for I/O
// reading.
// Incomplete address decoding ... /> // Instantiate and connect Sinclair port 1 interface.
sinclair_interface sinclair ... endmodule
// Fuller. Port decoding: 0xxxxxx1
// Negative logic ...Converting games to disk: difficult loadersThis thread has an spanish version in foro speccy, but I haven't gathered enough information to overcome my problems. I've been converting some game…
... a byte is sent to $7ffd or is readed from $fe ... :
br port write 0x7ffd
br port read 0xfe
port.
[QUOTE=Zup;676101 ...The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... /> 1. Kempston, mapped on $1F port.
2. SJS1, mapped on ... standard are read by reading the Z80 input port $1F (31 dec ...No tea vicar on MB02Hello Folks, I have difficulties in getting "More tea vicar" (the free 128k version) running on the MB02. The game starts and you can choose control…
... ;669727]Yes. Here is port collision between MB02+ and ULA ... ULA+ port then will runable on real MB02+. Only reading from ULA ... /> Here is schematic with MB02+ port adress decoder:
[url]http ... then MB02+ return on port #3B(ula+ port) undefined value (can be ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... data bus and the printer port is correct! It might actually ... what's called the control port (port #1F, on the DISCiPLE). The ... bus. Bit D5 of that port is documented in the Ramsoft ... a few fuses that prevent reading of its contents, though?)
Your ugliest machineSee what I've done here?... Which computer / console that you have owned / was the worst looking? For me I think it was the original PS1. I liked th…
... I like, like the user port, analogue port, back in the day ... as being owned by Guardian reading, sandal wearing middle class liberals ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... to 34 from the expansion port, there are several (3) grounds ... and will require a expansion port-IDC34 pcb adpator, but this ... signals are there.
Reading about the inhibit and the ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... bit 3 of the control port (#1F). The DISCiPLE ROM ... port #BB ('patch'). The Spectrum ROM is paged back in by reading ... from port #BB. Reading from port #7B ('boot') places ... very close to correct) from reading of the disassembly. I ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... ]Hi.
I've been reading about that. At any documentation ... bit 3 of the control port (#1F) as I said previously ... perform an OUT instruction affecting port #1F to get at the ...Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…
... most other interfaces would use port I/O, instead.
reading lowers the printer strobe line ... accesses the floppy control port, with the drive selection ... goodness... I'm actually reading hardware schematics and possibly ...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…
... ULA to know when a port is contended, it has to ... almost all) ports, but leaving port FFh uncontended.
The ... why RAS goes high after reading the first display/attribute pair ... so that odd I/O port accesses are not contended, as ...Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
... prevent the Z80 CPU from reading the correct information from the ... PC with a parallel printer port, you can read the ROM ...Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…
... state:
k-mouse buttons port 64223/15071:
===============================
KEMPSTON JOYSTICK / A-MOUSE : port 31(#1F)
==========================================
D0 ... very fast and often reading kempston joystick port. Need more CPU ...Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
... prevent the Z80 CPU from reading the correct information from the ... PC with a parallel printer port, you can read the ROM ...Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…
... />
I have kept the port reading and mouse update separate, mostly ...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…
... a "real" port at FFh address, which upon reading, it gives you ... -colour display routines, that uses port FFh to synchronize themselves with ...
