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Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …
[QUOTE=guesser;689592]I've written quick ... code at 0x0000 in a ROM to copy a block of ... -
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…
... the EPROM and original ROM, and for pins that ... is connected on the board (socket?). And if necessary, modify ... some pins of a ROM may have a different ... the same pin on another ROM, this depends on manufacturer. ... handy when modifying the socket pinout to take an ... -
Sixword SwiftdiskI just got hold of a Sixword Swiftdisk interface, which seems to be a very interesting piece of hardware. It looks almost identical to an IF1, can co…
...
2.4 ROM versi?n fits in a ... 27C128 EPROM
3.4 ROM versi?n fits in a ... swift-disc can use both rom version. In fact, I take ... the reason for change your ROM?. If your swift disc works ... break tracks. Forgot to put socket because there isn't space ... -
Raising to the powerA curiosity of ZX Basic I found yesterday is that you can't do this: [code] 10 LET x=-3 20 LET y=x^2 [/code] While you can for example do LET y=-3^…
... explaining what guesser's already explained ...
The Spectrum ROM calculates ... -
Composite mod - which one?On all my 16K/48K and Plus Spectrums I use to carry out the "Womble" Composite mod: [URL="http://womblesretrorepairshack.blogspot.de/2008/11/zx-spect…
... interface also provides a joystick socket, RS232 socket, ROM cartridge support and a ... -
Video output questions...Two questions... [QUOTE]1. The yellow and blue colours seem out of phase on the display. Is this normal for an RF connection to the TV/monitor?[/QUO…
... interface also provides a joystick socket, RS232 socket, ROM cartridge support and a ... -
SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
Thanks Paul for your explanations. That?s really cool!
I think I need one with a ROM Cartridge socket, once finances (and the female finance minister in-house) allow.
WhizzBang is right, would be great to have a case. -
SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
[QUOTE=schombi;694733]I think I need one with a ROM Cartridge socket [/QUOTE]
Me too. Will be fun to get some carts to burn. Filling up the piggy-bank right now. :) -
Spec +3e CF Card interface working Great but a different problem popped upHey, just wanted to say thanks to everyone that helped me get my Spectrum +3e and CF card working. I've been playing on it all last night and this a…
[QUOTE=guesser;696545]Could be that you' ... what could cause the +3 ROM(s) from not fully loading ... ... On the +3, the 128k ROM is loaded first, correct?
Spec +3e CF Card interface working Great but a different problem popped upHey, just wanted to say thanks to everyone that helped me get my Spectrum +3e and CF card working. I've been playing on it all last night and this a…
[QUOTE=guesser;698229]The short answer is: ... probably mean". There is a ROM (I [I]think[/I]) which ... have the filesystem driver in ROM and RAM on an external ... 16k!)[/QUOTE]
Thanks Guesser.
I figured since I ...another faulty zx spectrum +2 to fix!!!Hello to all, I'm new here... I have got a faulty +2 (gray) and start to try fix it... I have read the treads of xaris_sm and Pluto63 as background…
some little progress after rom ram test fitted in (with ... and gnd on the 78s05 socket without it installed... I read ...Strange and faulty toastrackI just got hold of a toastrack, which is kind of strange. First of all, when I opened it, I spotted a socketed ULA and ROM, which is good, however, t…
... the kempston interface with composite socket will not lead any composite ... outside world.
The ROM is probably not the original ...Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
... creates is from the MIC socket and the internal (rubbish) speaker ... Ltd (does this mean the ROM's OK?), but wouldn't ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... located between the power input socket and the metal heatsink.
ROM first, as you can then ...DIVMMC, a new compact interface for ZX SpectrumAfter a long gestation period and a short period of testing, Mario Prato, member of the Italian [URL="http://apuliaretrocomputing.wordpress.com/"]Apu…
[QUOTE=guesser;703366]Does the cpld perform ... incompatible with ZX128+2A/+3 rom. If author connect ROMOE1 pin ...Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …
... the Z80, the ULA, the ROM, the RAM combined that process ... Molex connectors?
Problem with socket for Z80 or ULA?
ROM
[*]to measure the resistance ...Testing a +2I recently picked up a non functioning Spectrum +2 Grey (Issue 3 board?), and am just beginning to go through and see what needs to be done to it. I …
... several checks like socket contacts, ULA function, Z80 function, ROM function, capacitors ... function
a. Use diagnostic rom (I use Paul Farrow's ...ZX Interface 1 Odd ProblemI have just upgraded a rubber key ZX Spectrum (issue 3) to a ZX Spectrum+. Oddly, when used with a ZX Interface 1, CAT 1 produces a question mark. T…
... />
However, the Interface 1 ROM was still not linked in ... bad soldering on the processor socket I guess, or damage to ...Kempston (joystick) keyboard??Dear all, I am playing with an idea to have a Kempston keyboard. The wiring would be the same as Kempston Joystick to meet its standart, so that all…
... end of this thread. [B]Guesser[/B] and I were discussing ... =4[/url]
[B]Guesser[/B]'s idea was to ... need a special driver or ROM to read it.
Guesser[/B]'s way gets you ...Kempston (joystick) keyboard??Dear all, I am playing with an idea to have a Kempston keyboard. The wiring would be the same as Kempston Joystick to meet its standart, so that all…
... end of this thread. [B]Guesser[/B] and I were discussing ... =4[/url]
[B]Guesser[/B]'s idea was to ... need a special driver or ROM to read it.
Guesser[/B]'s way gets you ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... /> Recommendations, anyone? :S I can socket the Z80 if necessary; perhaps ... my +3 is in a socket, will have to check after ... : any chance of a test ROM? Happy to pay for materials ...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…
... up on the IF1 shadow ROM
my first idea ... - but I distinctly remember bugging guesser about it *hehe*Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
[QUOTE=guesser;711554]Someone can probably suggest ... instruction as it executes the ROM firmware. This is rather long ...What models are repairable these days?I've followed a few threads which are trying to repair the mainboard components of the older 48K models, but it got me wondering - is it possible to …
[QUOTE=guesser;712063]Well they don't ... mic line on the audio socket? (which is either contact on ... a header. The tape (amp) socket isn't an issue.
Guesser, surprised ya don't know ...+3 Membrane Scheme??I've been looking and only find the scheme Sinclair models, and would need to find the +3 keyboard scheme. Does anyone have it? Thanks
[QUOTE=guesser;712265]Right, done. This is ... test routine in the +3 ROM and check that these combinations ...What models are repairable these days?I've followed a few threads which are trying to repair the mainboard components of the older 48K models, but it got me wondering - is it possible to …
[QUOTE=guesser;712356]I'm struggling to ... why you would attach a socket to the ASIC MIC line ... a +3 since the tape socket is pretty noisy and loaded ...What models are repairable these days?I've followed a few threads which are trying to repair the mainboard components of the older 48K models, but it got me wondering - is it possible to …
[QUOTE=guesser;712400]Which leads to dead ... why you would attach a socket to the ASIC MIC line ...
