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I/O port adress map of Spectrum and interfacesI'm looking for an adress map of all the used and unused I/O ports for the ZX-Spectrum. Many years ago I designed an I/O board for the Spectrum that…
... all the used and unused I/O ports for the ZX- ... I designed an I/O board for the Spectrum that can adress 16 I/O ... Spectrum and as far as I know it also works ... for the Spectrum and I would like to know ... before I try to combine them.
The port adresses ... -
128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …
... to allow 128 I/O ports by using ... any I/O access at a port with A7 ... so freeing all I/O ports in the ... Looking at the 128 I/O ports patch, it occurs ... /> /
|\ |/
A7---+ O---+
|/ |\
v
... -
Parallel to serial z80 i/o portI have an Opus Discovery and an Alphacom 32 printer. I want to see if I can make a cable that will use the Opus Parallel printer port. The question i…
... pins to the Opus printer port pins...
... So of the two instructions I can see common notation ...
Niether of which I see available on the Opus ... ?)
Note: I assume in the Alphacom 32 ... -b etc then I am sure i can make a custom ... -
DCP P-PACK (4K RAM I/O)Ive got these I/O Packs in fantastic conditon (one of them is boxed as you can see) It would be a waste to put them on ebay I feel, so I'm intereste…
Ive got these I/O Packs in fantastic conditon (one ... put them on ebay I feel, so I'm interested to see ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... c.s.s faq describing I/O contention.
The 48k ... is useless.
So, I'm curious how is it ... in real zx spectrum. As I do not have hardware to ... check right timings I can only ask if someone ... -
SPIN's breakpoints - an overviewAs quite a few people have been asking how to set breakpoints on memory write etc. in SPIN, here's a description of the way the breakpoints work. Get…
... to a specific address or I/O port.
[code]
UNTIL ... You can break on port I/O instead by using RPORT and ... out for, regarding port I/O: The Z80's port input/output ostensibly ... /> [code]
UNTIL (RPORT & 255) = 31
[/code]
... ... -
List of I/O ports used by common peripherals?I remember looking at a file (just plain text, IIRC) a while back that listed all the IO ports used by various bits of Spectrum hardware, such as the…
I remember looking at a file ( ... disc drives etc.
I just can't find the ... exists? Does it include the I/O ports used by the DivIDE ... -
Tape I/O in z88dkAccording to the documentation, z88dk appears to have facilities in its spectrum-specific library for tape i/o - [url]http://www.z88dk.org/wiki/doku.…
... spectrum-specific library for tape i/o - [url]http://www.z88dk.org ... -
J Invalid I/O devide, why ?Just tinkering with the asm code i got this error when executed the C/M: J Invalid I/O devide the liune that caused this is 'Call 15DE' that calls t…
... tinkering with the asm code i got this error when executed ... C/M:
J Invalid I/O devide
the liune ... to call the subroutine so i just typed this line into ... -
Buffered I/O how-to?Hello. How do I implement a buffered I/O? Not all Speccy's I've got will work with more than one device connected to the rear.
Hello. How do I implement a buffered I/O? Not all Speccy's I've got will work with more than one device connected to the rear. -
ZX Spectrum Light Gun - PROGRAMMINGAmongst some items I recently acquired was some information on the Spectrum Light Gun. Amongst this is a bit of hand-written paper which gives the i…
Amongst some items I recently acquired was ... games.
I can't find this anywhere ... 65533,7 to select control port
OUT 49149,63 ... 14 to pick I/O port
IN 49149 gives port reading
...
Values:
239 or 255 ( ... -
Multi I-O InterfaceHi all, I found this by luck, and just want to share. Did you ever noticed? https://www.ianjohnston.com/index.php/projects/58-project-022-zx-sp…
Hi all,
I found this by luck, and ... -project-022-zx-spectrum-multi-i-o-interface
If its ... -
Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... - The keyboard is attached to i/o port $fe (254). The keys are ... during a 16-bit port read identifies which row ... read a 16 bit port address is to put ... =16384 to 22527: poke z,255: next z
... address and attribute addresses. I'll leave that for you ... -
I/O on the Speccy - ideas/help wanted!I'd like an interface for the Spectrum that can control and monitor other items. I have a task in mind that would require: A: 4xbinary inputs (as in…
... on" or "off" x4 - this I can hack up with a ... ).
How should I go about building that?[/quote ... you want to be your i/o port it connects the data lines ... your value (0-255)
I don't know exactly ... would buld it, as I don't know exactly what ... -
Help: OUT (port), A[deleted]
[code]
port=254 ; port 254 controls speaker
LD B, 255 ; 6,255 ; Prepare ... />
LD B, 255 ; 6,255 ; Prepare to loop 255 times
LD ... BC register to specify the I/O port. OUT (n)/IN (n) uses ... -
some debugger in emulators that is able to brakpoint when a mem address is accessed ?Is there a debugger (disassembler) available in some emulator that is able to stop (breakpoint) when a particular memory address is accessed ? For e…
... to a specific address or I/O port.
Code:
UNTIL ... ). You can break on port I/O instead by using RPORT and ... out for, regarding port I/O: The Z80's port input/output ostensibly ... Code:
UNTIL (RPORT & 255) = 31
...which masks off ... -
address 23760 etc.Hi all, Where could I find Spectrum 48 addresses, what's in 23760 for instance ? Thanks for advance ! -jp
... memory also has an addressable I/O (Input-Output) space which ... POKE are used.
I/O space:- IN and OUT are ... be controlled by writing to I/O port 254.
... OUT 254,0: OUT 254,255: GO TO 10
... bits of) the same I/O port. It is more convenient in ... -
address 23760 etc.Hi all, Where could I find Spectrum 48 addresses, what's in 23760 for instance ? Thanks for advance ! -jp
... memory also has an addressable I/O (Input-Output) space which ... POKE are used.
I/O space:- IN and OUT are ... be controlled by writing to I/O port 254.
... OUT 254,0: OUT 254,255: GO TO 10
... bits of) the same I/O port. It is more convenient in ... -
Playing AY sounds with BASIC.Is it possible? If so how? I've seen in one forum a while back mention of using interrupts to play but AFAIK this is machine code only. The goal of …
... 255)
13 Envelope shape 4-bit (0-15)
14 I/O port ... A 8-bit (0-255)
15 I/O port B 8-bit (0-255 ... _
I/O I/O Noise Noise ... -
Bell sound with PLAY command?Hi Folks, I am no musician so I was hoping someone could give me a PLAY command that would sound like a bell on the Spectrum. A bell that sounds li…
... 255)
13 Envelope shape 4-bit (0-15)
14 I/O port ... A 8-bit (0-255)
15 I/O port B 8-bit (0-255 ... _
I/O I/O Noise Noise ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... the banks are mutually exclusive I'm not sure how usable ... spare bit in an available i/o port to select between the EXROM ... ) and each other bank #1-255 can select one of 254 ... -
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…
... version:
[code];old I/O port adresses
DAT EQU # ... br />
TABLE OF PORT ADRESSATION (old/original devices):
#FF/255 xxxxxxxx11111111 xxxxxxxx1xxxxx11 FDsys(6,7 ... devices.
But I have one idea for internal ... -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... , but CMOS CPU send value 255 to port BC.
LD ... CMOS CPU.[/QUOTE]
I typed the following program:
I/O port of ULA.
Thanks ... -
Which Emulator supports Betadisk48?Hi out there and happy new year, I'm looking for an emulator to run with my vision1.7 trdos-rom in 48 mode. Unfortunately most emus only support Bet…
... a "Latch" configuration connected to port 255 (FFh).
Because the ... eliminated by operation of an I / O port 252 (FCH) which causes the ... the interface).
255 (FFh) - secondary port configuration:
Bits 0 ... -
48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... and any differences between them I was interested in. We ... Not the usual approach, I know, but if Ferranti were ... left.
Does port FE read 191 like the ... 6C001E-6 ULA or 255 like the 5C112E ULA?< ... For the changes to ULA I/O port ($FE) reads, Fuse has ... -
Copying a single character from one place to another?[code] ORG 33000 LD A,8 LD HL,16384 LD BC,256 LD DE, 18432 LOOP: PUSH AF LD A,(HL) LD (DE),A ADD HL, BC POP AF DEC A JR NZ,LOOP REST […
... to a specific address or I/O port.
Code:
[b ... You can break on port I/O instead by using RPORT and ... out for, regarding port I/O: The Z80's port input/output ostensibly ... Code:
UNTIL (RPORT & 255) = 31
...which masks off ... -
ZX Spectrum +3 - incompatible ?Hello :) I'm newbie here. I know WOS site since years, never checked forum before ;) , but this moment came when I have problem. I wanna buy ZX Spe…
... :)
I'm newbie here. I know WOS site since years ... /> [quote] * Reading a non-existent I/O port no longer returned the last ... yet. Compatibility is important thing. I have 1 day to decide ... , before I do this, I need answer on these ... -
New colors / switchable color palette with regular ULA ?Hello. This may be an ignorant question but I just thought about it today and wanted to post it here to get some opinions. OK, so, today, while goin…
... old issue1/issue2 video symptoms. I knew the video circuitry needed ... readjustment but I just didn't have ... away.
Tonight I looked at the Spectrum Hardware ... resistors via software, using an I/O port and a few extra resistors ... -
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][B]Spectrum I/O port details[/B][/I]
[ ... known variant or "standard", which I/O addresses are used?
... mice / which mouse interface[/B][/I]
[LIST]
[/LIST]
[I][B]Software[/B][/I]
[ ...
