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128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
Robocop loaded with no problem once I made a .wav with tapir :)
(Note: I will get an LM324 and repair my datacorder, just to have complete system. And keep this circuit as the EAR in port). -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... that there's a 'bug' in port $FE — updating the 'MIC ... doesn't affect the 'EAR' bit when there's ... playing, but rather the EAR bit reverts to a ... when neither memory or port I/O is being ... /> [*] The behaviour of IN from an unattached port ('floating bus').
... -
Folks with real speccies - test this!A lad from another forum has written a music demo for the Speccy, but he can only test it on ZXSpin, so needs some helpful chaps to record this to ta…
... probably be disinclined to lead in an extension cable and rummage ... always done it via cassette in the past. When the Speccy ... out of the loudspeaker port to the EAR socket, I suppose ... ... unsettled by that unwarranted 'p' in Lambton Worm ...
...< ... -
Timex 2048 + Interface 2When playing with ZXC3 cartridge (very nice piece of HW from Paul - highly recommended), I connected original Sinclair IF2 to TC2048 and... no joysti…
... , because the internal hardware steps in and responds if you try ... from address 254 ('IN $FE') for the keyboard or EAR/MIC. But ... A0 going low on a port read, meaning all even addresses ... then read it by 'IN $EF' instead of 'IN $FE'. But it ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ld a,0x7f ; read port 0x7ffe
in a,(0xfe)
... ; e: bitmask for reading EAR
and e ; ... look at EAR bit
cp d ; ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... port 0x7ffe
in a,(0xfe)
and 0x41 ; look only at EAR ... border ; put border colour in accumulator
or 8 ... ; rotate the new bit in from carry; if
... -
Writing to MIC portSo I had a new crazy idea: How about a stereo beeper engine? Since we can set bit 3 on port $fe to output to MIC, writing such an engine should be ra…
On Timex EAR is input, so writing to it gives no sound. At least as I remember.
If ZX is able to mix eight channels, than external port can be used (4 bit / channel in stereo ) -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ,0x7f ; read port 0x7ffe (7T)
in a,(0xfe) ... ; (11T)
and 0x41 ; look only at EAR ... border ; put border colour in accumulator
or ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... br /> It turns out IN F,(C) doesn't ... /> Z flag - set if port reads zero - checked by Z ... 5 flag - bit 5 of port - can not be checked< ... parity of all bits of port - checked by PO / PE ... on bit 6 being EAR, and bits 0-5 ... key press on that port will also break the ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... the flags to capture the EAR bit - wish I'd ... devote BC to the port address in order to avoid reinitializing ... upper byte of the port address is irrelevant because ... 'm only looking at the EAR bit.
... you're only using the EAR bit.
[quote ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... /> I did some tests in the Fuse too. If my ... I also have a small EAR-based test which I do ... code relies upon the incomplete port decoding (specifically, I use ... , as it is emulated in Fuse, does not seem ... able to support Timex in this software without limiting ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... loaders and routines running in tight loops waiting for ... It's a pain in the neck that all the ... /O is on the same port.
Given that ... in a,(0xfe) ; read port 0xfe (11T)
add a,a ; shift EAR ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> in a,(0xfe) ; read port 0xfe (11T)
add a,a ; shift EAR ... -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... IN A,(+FE) Make an initial read of port ... /> - the present EAR state.)
CP A ... port +7FFE.
IN A,(+FE) i.e. BREAK & EAR ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> out (ula), a ; write port
ex af, af' ;'restore ... push hl ; return address
in a, (ula) ; read ULA< ...
and %00100000 ; keep EAR bit
or red ; red ... ld c, a ; store A in C
and %00000111 ; ... -
Dan Antohi or other Interface 1bis GurusHi Dan I've been getting acquaited with the IF1bis and am starting to appreciate how much more it can do than what Im using it for. I've been using…
... interface is in the 'ON' state. While in the 'OFF ... version 3a.
In case you meant the 'Inactive ... FF, though using the interface in the 'Inactive' mode is ... t loaded via the ‘EAR’ port from an audio signal ... that the interface is in its ‘Active’ mode ... -
Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... mine and Alcoholic's posts in the SP1 doc thread[/QUOTE ... __CALLEE__ designator to be ignored in the actual function "int __CALLEE__ ... /reference/48kreference.htm#PortFE"]ULA Port 0xfe reference entry[/URL] I ... different values for bit 4 (EAR) then a click will be ... -
Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... reference/48kreference.htm#PortFE"]ULA Port 0xfe reference entry[/URL] ... different values for bit 4 (EAR) then a click will ... committed in there now :- zx_border reads the beeper state from port $ ... fe, then mixes in the border colour ... -
IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…
... telephonic assistance. I am also in South Africa, so the telephone ... a joystick to theIF1bis joystick port
7. Connect the IF1bis ... Spectrum while keeping the joystick in the right position. The interface ... an audio cable from the ear connections
2. I ... -
IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…
... telephonic assistance. I am also in South Africa, so the telephone ... a joystick to theIF1bis joystick port
7. Connect the IF1bis ... Spectrum while keeping the joystick in the right position. The interface ... an audio cable from the ear connections
2. I ... -
Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... one considers SAM Coup? port allocations, although thankfully that ... /> Bit 6 EAR serial input from EAR of cassette recorder ... and just swap the port address in software? Since one lot ... only discussing availability of port space, not suggesting that ... -
Loading games from a old PC to a speccy?Hi all I've got an old Pentium 1 200Mhz PC which I'm sure could load games to my speccy seeing as my tape drive is knackered... I remember when w…
... them to the right location in RAM
... the z80 command IN should be used to recieve ... PC to the Joystick port? (or EAR might work)
... an emulator that loads tapes in under a second.
< ... bit 6 of port 0xFE using the IN command to ... -
+2 Force Loading from external tapeHi all My tape player is shot and now thanks to my frustration not functioning what so ever i see there is a Tape/Audio port on the back of the spec…
Fail... Well with that in mind i went ahead ... [/img]
Audio port removed and the PCB join ... cut so that the "ear" part of the phono ... JPG[/img]
Audio port soldered back onto the board ... a wire which links the "ear" part of the audio ... -
Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... /> Think of a code written in VHDL or Verilog like the ... representation of a schematic diagram, in which you describe small black ... descriptioon).
Describing things in a HDL like Verilog is ... depending upon the I/O port read */
if ((adress_bus & ... -
Serial comms - duzzit work?Has anyone ever successfully got two 128K Speccies (of any variant) to communicate with each other over the SERIAL / RS232 / MIDI / AUX ports? I can'…
... 16 is the I/O port.
The register is ... contains at least one error in the above) indicates the following ... like the ear/mic confusion these are backwards. In other words the ... -
IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…
... are also bits for the ear and mic, and five keyboard ... /> In [i]all[/i] of these ports, bit 6 is the EAR ... port $fb (1111 1011), but also port $f3 (1111 0011). Any port that in ... different address bus line in its [i]port decoding[/i]. The problem ... -
Monkey Island On Speccy...I would love to see Monkey Island on the speccy...think it can be done...not as much detail or graphics...but along the same story lines.... What ot…
... conversion programs out there written in QBasic that could be ... somebody already said, leadership - nobody in their right mind wants to ... of being jumped by Mickey ear wearing lawyers)...
- ... the data from the CPC port might be easier (and less ... -
Jiiira's Sparrow LITEHi All, Just for info .. :) big eprom, cheap 32KB ram and etc. i don't know specification .. :) https://youtu.be/NbI7E1aebrM modern speccy .. …
... one and put Harlequin logic in there? Original ULA probably means ... 2x 74LS157's (near mic/ear) could have been removed from ... think.
* Small signal transistor in metal can (lower left corner ... not gold-plated.
* Joystick port(s) or SD card would ... -
19, S Davis snooker & light gunGot these things in different packages I've ordered over ebay. The light gun came with the +2a, but I have no idea whatsover what to use it with. Do…
... ..
both go in the serial port BUT you have to ... connector, but with 9V batery +EAR connector instead? How would it ...