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ResiDOS v2.00 releasedI've just posted a major new release of ResiDOS, at: [URL="http://www.worldofspectrum.org/residos/"]http://www.worldofspectrum.org/residos/[/URL] T…
... -defined value to a single port to switch banks. The SE ... you need to do two port outputs to switch between some ... used by ResiDOS means "usually read-only, but if I need ... -
SoundHi Could someone explain how to "decode" the spectrum sound?(the beeper). I'm guessing its an out port? Cheers /Jimmy
... =Jmc;181148]HA! got it.. port 0xfe right, and bit 4 ... ,
Yes bit 4 of port 254 (0xFE).
Bear in ... timing of bit 4 of port 254. This can be used ... colour is also affected by port 254 (bits 0, 1 and ... about that. You cannot [i]read[/i] the border colour on ... -
Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…
... be able to load and read values from the chip. This ... uses LEDs so if the ULA is also toast, you can ... -
Spectrum 48K ROMHi Can anybody help I have an Issue 6a Circuit Board which has a faulty ROM Chip. Is it possible to program a ROM Chip with the 48K ROM and fit it as…
ULA is practically same in all ... are only differences in EAR port and position of bitmap.
EPROM Programmer?I'd like to pick an eprom programmer up for trying new roms with my +3 and my BBC Master (I need some extra roms to make it useable with my GoMMC any…
... LPT port and [I]does[/I] use external power. I read on ...Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…
... row in the 16-bit port READ of the keyboard and a ... as the other spectrum joystick read functions in that directory. This ...Arcadia - by ImagineArcadia, by imagine. I thought I'ld play this last night, but its pretty awful to control Anyone know whats with the random movement and occasional…
... it read the keyboard, and occasional stray bits across the port would ...Arcadia - by ImagineArcadia, by imagine. I thought I'ld play this last night, but its pretty awful to control Anyone know whats with the random movement and occasional…
... joystick (port 127) which contains the floating bus value when read outside ...Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …
[QUOTE=aowen;184041]I think it is possible to read the border colour via the interference sent to port $xxFF.[/QUOTE]
ooh, that's a good point.New Game - JustinA new isometric 3D Game for ZX Spectrum, Justin: [url]http://cpce.emuunlim.com/justin.tap.zip[/url] It can be played in spanish and english languaj…
... disked version but couldn't read the credits ;)
Okay ... ($FE),A ;send B to port $FE to affect sound/border ...non standard loader bar coloursAs with my speedloader thread, when did non standard colours start to appear and who came up with the idea and what was the reaction?
... time (the ones that the ULA/TV is tracing at the ... which attribute row is being read however. Also, intensive writing to ...problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... with electronic components but I read manuals and repair my sinclair ... 't have picture of tv ula it became extreme hot very ...Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …
... decodes writes to I/O port $FE and stores (in a ... .
You can then read back the colour from the ... , so far unused I/O port address...
Marcelo ...Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... and its got through 2 ULA's but its still working ... tv, built in if2 joystick port , composite video out).
ive ...Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... takes more gates in the ULA to do it that way ... gates as possible in the ULA! I believe the BBC also ... that built the screen picture read the RAM only when the ...Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
[QUOTE=Winston;185959]ULA! I believe the BBC also ... that built the screen picture read the RAM only when the ...ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank
... they use the same ULA Chip. I read somewere than 6C001-E7 ...ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank
... they use the same ULA Chip. I read somewere than 6C001-E7 ...SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... how many T-States the ULA spends holding onto the lower ... the page. Quite an interesting read for the techies!Is Ferranti still alive ?And if not......why should there be any restrictions on manufacturing the ULA ?
I have read what you and others have ... FPGA to "make a new ULA", which means that the functions ... of the original ULA can be obtained.
128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
... 1985) has a AMSTRAD ULA. I remember it broke ... s nice to see AMSTRAD ULA in 128k speccy :) We ... after Sinclair takeover has repainted ULA's with their logo ... on RF modulator or RGB port with no result (i ... 2 board: (see the Amstrad ULA chip, same 40056 number) < ...Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... ULA chip needed ![/QUOTE]
I wish I could read Russian ...WoS hits 500 permission statementsIt's been a while since I asked, but since we reached our 500th permission statement from individuals today, I thought I'd remind you all again: If …
... simple Chess points system I read somewhere. It was fast at ... 't the modded (a cassette port, [B]MAJOR[/B] mod!) +2 ...Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
[QUOTE=zub;189166]
Was it an exact clone? I can see a reference to "Kempston Joystick" so perhaps not? :)[/QUOTE]
If you read the schematic you see there is no joystick port or expansion port. No need to read Russian for that ! ;)Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
Is not simple to read Russian ! My project is to do an "modern" ULA chip replacement using CPLD technology.Reason for FLASH attribute?Is it known why Sinclair choose to implement the flash bit in hardware? Since flashing could be easily done with code when needed it seems quite un…
... . It is quite likely the ULA just has a "gain" control ... (s) you wanted and actively read-modify-writing the underlying bitmap ... no more room in the ULA. Maybe nobody thought they'd ...Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... ;189683]Is not simple to read Russian !
[/QUOTE]
What ... is to do an "modern" ULA chip replacement using CPLD technology ... some clones built using cloned ULA. Chech machine Didaktik is also ... built using a ULA clone. This project would be ...Reason for FLASH attribute?Is it known why Sinclair choose to implement the flash bit in hardware? Since flashing could be easily done with code when needed it seems quite un…
... . having one bit on some port, which [B]enable [/B]or ... . In such case QL's ULA draws a horizontal line from ...InterfaceHi I'm building a spectrum emulator. I've tried to build it as modular as possible, for example I have a zx class that have input and output devices…
General ROM paging is all done in hardware. Take a look at the Spectrum Diags board in my sig below if you want to see it in schematics.
But in summary, the Spectrum exposes a line called ROMCS at the edge connector. Every memory chip in a ...What control methods should I supportAs Bipboi is nearing it's completion, I need to ensure i cater for all control methods required by the users. Currently it just supports: keyboar…
... joystick is super-easy. Just read port 31. The meaning of the ...
