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Search Again :: Adv Search 1000 results in 0.013s
<1…14151617181920…34>
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... /> So you are dropping an RST 0H into the trip point ... related to the fact that RST 0H will push the program ... by the RST 0H instruction). Your return to BASIC ROM code could ... ;s first 8 bytes of ROM?

    [b]I stll ...
    BloodBaz BloodBaz March 2007 Emulators
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... you trace it from the RST 0 with a debugger.
    ROM, so it's ideal for ...
    glancaster glancaster March 2007 Emulators
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... patch both the BASIC ROM and the MicroSource ROM. I worry relocating ... in place a JP or RST instruction) will cause problems if ... be, particularly for the MicroSource ROM which is a bit of ...
    BloodBaz BloodBaz March 2007 Emulators
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... used to snatch the uSource ROM was, in fact, paging by ... reg pair in the address bus and asserts two Z80 signals ... -ROMCS line so the BASIC ROM is not enabled. Once the ... , in effect disabling the uSource ROM and reenabling BASIC.
    The ...
    Marcelo Marcelo March 2007 Emulators
  • Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…

    ... also has 64K - 16K as ROM, which you can't change ... itself or using routines like RST 16 from machine code), and ...
    Winston Winston March 2007 Hardware
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... used to snatch the uSource ROM was, in fact, paging by ... reg pair in the address bus and asserts two Z80 signals ...
    Woody Woody March 2007 Emulators
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... used to snatch the uSource ROM was, in fact, paging by ... reg pair in the address bus and asserts two Z80 signals ...
    BloodBaz BloodBaz March 2007 Emulators
  • toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…

    ... write it to the flash ROM).

    I guess LEDs ... hangs directly off the Z80 bus, and thus consists of only ...
    Winston Winston March 2007 Hardware
  • TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…

    ... better. Next one has the ROM in a socket so you ... that the fault was the ROM all the time, you go ... is down to the address bus. Fine at 16K, but won ...
    DEATH DEATH March 2007 Hardware
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... fault is in the address bus such that it keeps going ... />
    And if the address bus is always going to the ... difficult to replace the Speccy Rom with an EPROM? There's ...
    dekh dekh March 2007 Development
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... eprom. You can replace the ROM by making an external board ... , so that the on-board ROM never gets selected. Simple decoding ...
    Winston Winston March 2007 Development
  • spectaculator 6.30 errorWhen I enable "load from audio source" Im getting a little yellow warning triangle in the status bar. When I click on that for the error it reports: …

    No luck Jon. Disabled Sophos AntiVirus and Firewall.
    Launching still locks on Splash Screen.
    Two "speculators" can be seen in Task Manager (7Mb and
    BloodBaz BloodBaz March 2007 Emulators
  • Multiface ResidentI'm thinking about adapting some existing code to be Multiface "resident"... but being perfectly honest I'm not quite sure where to start. Any top t…

    ... hl
    ld (hl),199 ;rst 0
    ;RET to BASIC ... 'in a,(95)'

    rst 0; and reset
    [/code ... remember if your code uses ROM routines you'll have to ... routine or copy/modify the ROM routine into the RAM with ...
    Mr. Anonymous Mr. Anonymous March 2007 Development
  • Amstrad +2 Diagnostic BoardCan anybody help I wish to buy the Diagnostic Board that connects to the I/O strip at the back of the Amstrad ZX Spectrum +2. Many thanks Martin

    ... Z80 runs and the bus isn't buggered (which ... />
    * 128K flash ROM (Am29F010, since I have three ... * ability to program the flash ROM with a (working!) Spectrum, ... don't have a flash ROM programmer.
    * ability ... the flash vs Spectrum ROM will be an OUT ...
    Winston Winston March 2007 Wanted
  • Ram Turbo Joystick IntefaceAnybody know how to crack open this interface - non destructively. There are no pads on the bottom so no hidden screws.

    ... extension of the edge connector bus, and so as long as ... 't try and use the ROM cart slot, else you'll ...
    DEATH DEATH March 2007 Hardware
  • It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …

    ... is because I need the ROM toggling to be as ... address is put on the bus to make sure the Z80 ... executes from the appropriate ROM, and to be sure it ... get "half data" from one ROM and "half data" from the ... other ROM.

    From the ...
    Marcelo Marcelo April 2007 Hardware
  • Disassemblers and RSTsI think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020. Cheers

    ... version only suitable for IF1 Rom v1
    ;
    ... ;
    org $f900
    rst $08 ; f900 cf $0bts
    l_f909: rst $10 ; f909 d7 $0bts< ... cb 3f $08ts
    rst $10 ; f99a d7 $0bts ... ; fa1c 46 $07ts
    rst $10 ; fa1d d7 $0bts
    jp jp April 2007 Development
  • 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…

    ... used and are shadowed by ROM.
    With little modifications this ... pages and up to 32 ROM pages. Any page can be ... , utilising russian standard called ZX-Bus (it was estabilished in late ... close to original Sinclair expansion bus and can be easily converted ...
    Sonic Sonic May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... TC2068 has a Spectrum expansion bus and is 100% compatible with ... Spectrum Rom Cartridge. But the TS2068 has a TS1000/ZX81 bus instead ...
    zxbruno zxbruno May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... TC2068 has a Spectrum expansion bus and is 100% compatible with ... Spectrum Rom Cartridge. But the TS2068 has a TS1000/ZX81 bus instead ... /> The TC2068 has a Spectrum bus, but like the TS2068 is ... as it has the same ROM as the TS. The TC2048 ...
    jboatno4 jboatno4 May 2007 Hardware
  • +2b not working with interface1i was trying to transfer some of my programs from my microdrive carts onto tapes last night, but found both my 48k and my toast rack 128K have decide…

    ... handled there. If via RST #08 in 48k ROM, it will be ...
    Sonic Sonic May 2007 Hardware
  • 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…

    ... products) "listen" to the address bus (and the IOREQ and MEMREQ ... certain points in the Spectrum ROM, the paging in circuitry will ... an array that shadows the ROM (and RAM?) and assign a ... " only part of the address bus. That is why you can ...
    BloodBaz BloodBaz May 2007 Emulators
  • 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 ... chip in a Spectrum (both ROM and RAM) has what ... puts an address on the bus. This logic looks at the ... , this will either be the ROM chip (for addresses < ... />
    Concentrating purely on the ROM, when the Spectrum reads from ...
    Winston Winston May 2007 Emulators
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... know what the Timex expansion bus is like (ie: I don ... pin does what at the ROM edge connector).

    You ...
    Marcelo Marcelo May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... know what the Timex expansion bus is like (ie: I don ... pin does what at the ROM edge connector).
    [/QUOTE]
    Gods Gods May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... :)

    The TC2068 CART bus pinout is as follows:
    rom pin 20
    pin 6 ... to pin 27 of the rom OR pin 28 of the ... 1 and 28 of the rom/eprom and pin

    odious odious May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... owner replaced the original ROM on this cartridge with ... of using a 23128 ROM or a 27128 EPROM ... E (eprom) or R (rom) connection at those two points ... need that to prevent bus conflicts between the EPROM ... write into the lower 16k ROM area.

    ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Hardware
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... doing any CALL to ROM or RST instructions in my own ... address 0x38 = 56 in the ROM.

    So ... made. That's the ROM routine for scanning the ... or with routines in the ROM code?
    [/quote]
    ROM code polls the keyboard in ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... black screen because enough ROM code should be able ... BS, check the Spectrum ROM disassembly to make sure ... have failed such that the bus is "fouled" (i. ... it work too because the bus being "fouled" will ... something 'fouling' the bus - check for bus lines that are ...
    Winston Winston May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... not something 'fouling' the bus - check for bus lines that are stuck ... the pin 20 on the ROM). I see only 2. ... bit low. If I remove ROM from the circuit, resistance rises ... like this pin on the ROM has such a low ... ? Or do you think my ROM burned out?

    [ ...
    Avian Avian May 2007 Hardware
<1…14151617181920…34>

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HitBox

Word Docs Hits
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rom 15.6K 29.7K
bus 4.3K 6.5K

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