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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 IORQ ... IORQGE, so any I/O access at a ... so freeing all I/O ports in the & ... Looking at the 128 I/O ports patch, it occurs to ... /> /
|\ |/
A7---+ O---+
|/ |\
v
... -
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 ( ... that listed all the IO ports used by various bits of ... disc drives etc.
I just can't find the ... exists? Does it include the I/O ports used by the DivIDE too? -
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-Spectrum.< ... I designed an I/O board for the Spectrum that can adress 16 I/O ports ... and as far as I know it also works ... for the Spectrum and I would like to know ... compatible with those before I try to combine them.< ... -
I need info about +3e hardware portsWho can tell me what I/O ports addresses uses the +3e for the IDE interface ? On Garry Lancaster's site I have not found this info (however, I am not…
Who can tell me what I/O ports addresses uses the +3e for the IDE interface ?
On Garry Lancaster's site I have not found this info (however, I am not sure if I searched all the info on that site).
Cristi -
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 ... -
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. -
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 ... -
unused assembler commands?Z80 processor has commands like OUTI OUTD OTIR OTDR INI IND INIR INDR.They deal with sending /reading bolcks ofinformation to ports. The problem is, …
... (such as a disk or microdrive) into a memory buffer. The ... with this in mind - the I/O ports are addressed using the low ... -
Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…
... don't clash with the I/O ports of the IF1.
... intended.
[I][U]NOTE:[/U] It's ... obviously not the ideal solution...[/I]
An ... to effectively re-direct microdrive accesses to MMC/SD ... which had ZX-Net on ports 0xEF and 0xF7, then ... -
Spectrum Ethernet update...in which a toastrack 128K machine prods a machine outside of my LAN for the first time. [url]http://spectrum.alioth.net/doc/index.php/Current_eve…
... mass storage.
I have implemented an "A15 daisychain ... other devices with through ports are designed with the A15 ... . I will probably have to borrow an IF1 and microdrive, ... on the I/O ports quite yet, because I keep discovering devices I want ... -
Microdrive Serial ProtocolGentlemen, I've been dreaming for a long time to develop a Microdrive emulator, where an SD card loaded with .MDR cartridge images can be accessed t…
... instructions (how long will the Microdrive tape speed stay in sync ... really to make a microdrive emulator I doubt there's much ... br /> For documenting how the microdrive works, it's great research ... basically responds to the same I/O ports as the interface 1 and ... -
Microdrive Serial ProtocolGentlemen, I've been dreaming for a long time to develop a Microdrive emulator, where an SD card loaded with .MDR cartridge images can be accessed t…
... />
@Winston: I agree 100% with you, having ... everything you mention. I also considered to pursue ... ULA without fear of microdrive/cartridge damage/wear. The ... way, the various IF1 I/O ports work correctly but the ... values to the data I/O port, while COMMS ... -
128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
... understand is how reading I/O ports works! I hope the collective wisdom ... RAM page swap, all I want to change is ...
This means I need to read the value ... .
What I can't figure out is ... ?
Writing I can understand - you set the ... -
Deduggers in emulatorsI've used several emulators with build-in debuggers, and now I want to share my opinion. Debugger in Spectaculator 6.0 is great! The interface is nic…
... location, very usefull. But I don't understand how it ... depends on start address. I like information about Z80 registers ... it lucks some information about I/O ports, 128k memory pages.
... information about contents of usefull I/O ports and stack info.
... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... how the engine works. Eventually I will write up a more ... at all. AT ALL. I may add some character-level ... good for.
#2 I am using Microsoft debugging strategy ... /> - inp(), outp() (for reading/writing i/o ports), swapendian() have been added to ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... -home connector caused problems. But I think it may need buffering ... by the ULA, which so I believe consists of bipolar transistors ... find at least 4 more I/O ports out of the 128 usable ... register access will require three I/O instructions, which is much slower ... -
Need FPGA advice for building a 24 port Ethernet hubNot Speccy related but know some of you guys have done FPGA work. Boss at work wants me to get 50 x 24 port Ethernet port hubs designed to replace k…
... 'Hub' on front.
I am getting a supplier to ... unit that has 24 Ethernet ports, 24 link lights. So taking ... , FPGA needs 72 I/O ports at least.
I am asking them ... -
RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…
... result there are *no* free I/O ports on the Speccy.
ports each. Poorly implemented Kempston joystick ... gives a potential of 256 I/O ports that do not clash ... last device connected). Allocation of ports will be by committee. ... -
128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…
... allow free use of all I/O ports 0-127 by disabling IORQGE ... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
I make new ZX BUS PROTECTOR ... 1, multiface, etc..) but as I/O ports only. Memory access is disabled ... -
Velesoft's ZX128+2 with 1.5MB memoryMy old ZX128+2 PROFI (grey model - spanish version) for sale here: [url]http://aukro.cz/super-zx-spectrum-128-2-1-5-mb-i2738723874.html[/url] Back s…
... divide interface, use only IDE ports)
- easy switching between ... device can be use ad I/O ports.
- zx ram is ... mode (MB02 ram).
I don't have original ZX ... -
Migration to NemoBus ideology[B][U]Migration to NemoBus ideology.[/U][/B] Unfortunately all modern western hardware design is based on an outdated ideology bus, which was establ…
... choose the address input-output ports. This problem was solved ... a consistent selection of accessing I/O ports. Circuit engineering solutions that ... conflict addresses used by the I/O ports. Thus, to a large ... on the choice of port I/O addresses.
[ ... -
Fastest Z80?Hi , Could somebody explain more about the Kawasaki Z80 33 MHz to me? Is it fully backwards binary compatible with older Z80s and could it be used a…
... Spectrum clone? Cheers.
I can only find this:
? Single voltage
? 256 I/O ports
? 8080 emulation mode
New game: Krunel[IMG]http://www.speccy.pl/images/news/krunel_00.png[/IMG] Game name: Krunel Type: logical Author/group: [url]speccy.pl[/url] Platform: ZX Spectrum …
... or Z - drop block
O - move left
P - move ...
Joysticks: Kempston, Sinclair I or II, Times Computer 2068 ... sound chip working on different I/O ports than the ZX Spectrum 128K ... chip works with the same ports as Sam Coupe's version ...Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... edge connector). However, when I plugged in a Spectranet to ... the Z80 (pretty unlikely). I could discard this by waiting ... a contention problem (basically all I/O ports would get contended) forming part ... ULA from seeing odd numbered I/O port addresses. This was ...1st interface in 30 years (update)Hi all, Just a wee update to my "1st ZX interface in 30 years" project. Main IC's: 82C55 three 8-bit port I/O (configured for 12 dig in, 12 dig out…
... 82C55 three 8-bit port I/O (configured for 12 dig ... of general purpose digital I/O ports, 4 analogue outputs, ... on the 74LS138 I/O decoding so I added a couple ... any slave devices connected I was getting the ... temporary measure till I decided if I integrate it or ...New debugger features for ZEsarUX-4.1Hi I haved added new breakpoint conditions on ZEsarUX, the following 8 allow to put a breakpoint when accessing memory or i/o ports: MRV: value…
Hi
I haved added new breakpoint conditions ... breakpoint when accessing memory or i/o ports:
MRV: value returned ...
