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<1…17181920212223…34>
  • Spectrum 'slow down' hardwareAny one else got one of these ? If so do you find it useful ? [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=…

    [QUOTE=RST#08;307607]This is an ... from using NMI and a ROM hack) then the issue of ...
    Matt_B Matt_B October 2008 Hardware
  • Spectrum 'slow down' hardwareAny one else got one of these ? If so do you find it useful ? [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=…

    [QUOTE=RST#08;307607]This is an ... from using NMI and a ROM hack) then the issue of ...
    velesoft velesoft October 2008 Hardware
  • Using a QLI have the opportunity to pick up a QL in distress, having never even set eyes on one before I am not sure how much fun there is to be had with them.…

    Can do, its too small for a ROM socket, looks more like it would have held a TTL chip.

    [img]http://i40.photobucket.com/albums/e230/Womble76/ql.jpg[/img]
    Womble Womble October 2008 Hardware
  • 16K Rom with RS232 supportHi all, I am looking for a 16K Rom-code (to fit into the speccy) which supports RS232 and Network of IF1. Background: I am using 48K Issue 3 with W…

    ... I have in system programmable ROM. It works pretty fine. But ... to store the IF 1 ROM content. How to realise the ... traps RST 8. You'd have to rewrite the Spectrum ROM to ... use something other than RST 8 to ...
    Winston Winston November 2008 Hardware
  • Interface 1 on TS2068 - Possible?After an e-mail from a gentleman on eBay I realized the TS2068 edge connector doesn't have one or more signals that the Interface 1 needs. The twiste…

    ... need to have the Spectrum ROM active though I'm not ... done via RST 08. It's the returning to ROM after the ...
    Alcoholics Anonymous Alcoholics Anonymous November 2008 Hardware
  • Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…

    ... calling the ZX ROM is handled via the RST 8 trap, but ... if the RST 8 trap is disabled because ... return from ZX ROM, not the Spectranet ROM, because, well - RST 8 has ... longer depend on the ZX ROM).
    Winston Winston January 2009 Development
  • Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…

    ... calling the ZX ROM is handled via the RST 8 trap, but ... if the RST 8 trap is disabled because ... return from ZX ROM, not the Spectranet ROM, because, well - RST 8 has ... longer depend on the ZX ROM).[/quote]
    So that would ...
    rich_chandler rich_chandler January 2009 Development
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... able to change the ROM addresses that are checked, ... any interface with external rom/sram memory, must be ... on detect timex 2068 rom and patched system(or ... used extra version of rom type for TIMEX 2068 ... rom, but enterpoints to tape routines is identical (also RST ...
    velesoft velesoft January 2009 Hardware
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... connect any interface with external rom/sram memory, must be after ... /power-on detect timex 2068 rom and patched system(or used ... extra version of rom type for TIMEX 2068 ). All ... ZX48 rom, but enterpoints to tape routines is identical (also RST xx ...
    roko roko January 2009 Hardware
  • Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…

    ... example from the Spectranet C socket library's bind() function:
    ROM, but needing to return via ...
    Winston Winston January 2009 Development
  • Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…

    ... (assuming you are not in ROM):
    [CODE]
    LD (END ... . This is commonly seen in ROM with RST commands, but you can ... 82 ; location of RET in ROM
    DEC SP
    DEC ...
    Patrik Rak Patrik Rak January 2009 Development
  • Assembler snippetsI was just thinking that a thread for small but useful assembler snippets to do useful things would be cool for people learning z80 coding. Not to me…

    ... /> Intrupt must be enabled so ROM can set time.

    LD A,":" ; display seperator
    RST 16
    DEC HL ; goto ...
    Dr BEEP Dr BEEP January 2009 Development
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... you may have fried a ROM chip with static, or maybe ... of the connections in the socket the ROM sits in. Maybe you ... bent a pin on the ROM chip?

    There are ... two ROM chips on a +2a, which ...
    DEATH DEATH January 2009 Hardware
  • Is the original divIDE compatible with Interface 1Is the original divIDE hardware compatible with Interface 1 ? I would like to use the divIDE and Microdrives connected at the same time. Is this pos…

    ... of ZX Interface 1 ? After RST 8 connect IF1 external eprom ... ?

    Divide connect external rom memory if CPU go to ... :
    #0000 = reset/rst 0
    #0008 = RST 8
    #0038 = IM1 ...
    velesoft velesoft January 2009 Hardware
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... /> The pins on the two rom chips are fine
    Its ... mess? like puting A rom into B rom socket? I think I may ...
    Nuno2009 Nuno2009 February 2009 Hardware
  • How does the Speccy deal with the Character Set?Hi All, Can anyone spare a little time to explain to me the basic Assembly method of how the Speccy interprets and retrieves Characters to print on …

    ... asm method is to use RST 16. This is the Spectrum ... done.
    ret z
    rst 16 ; print the character
    ROM, and copy it to the ...
    Winston Winston February 2009 Development
  • R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…

    ... error...swapping chips, adding IC socket seats)
    I do have ... joints, also? I thought the ROM too, being the initial message ... some extra memory ICs, Z80, ROM, and a spare ULA. Just ...
    thomas3120 thomas3120 February 2009 Hardware
  • +3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…

    ... 128K commands. Therefore the same ROM is being used for interpretation ... with the standard 48K BASIC ROM (ROM3) since this gets ... actions when calling any standard ROM routine other than RST10, RST18 ... just use:

    [CODE]rst $28
    defw $0556[/CODE ...
    glancaster glancaster February 2009 Development
  • +3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…

    ... commands. Therefore the same ROM is being used for ... />
    error trap RST 8
    preserve error states ... error states
    set ROM 1-Syntax (which will ... set ROM 1-BASIC on non ... br /> hand back to original RST 8 routine

    chev chev February 2009 Development
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... />
    I've tested the rom and CPU sockets for continuity ...
    from bottom side to socket

    from time to ... may have inadvertently placed the ROM chips upside down at some ... /> but that could lead to ROM destruction no? or could it ...
    Nuno2009 Nuno2009 March 2009 Hardware
  • issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…

    ... track.

    i put socket for cpu i hope all ... .

    put socket for 74ls04n ( i put socket for all stufs ... think repaired

    about rom i received with mod for ... .speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url]
    gorski gorski March 2009 Hardware
  • 2 commands in 1 lineHi all, this is my first post although I have visited the web site many times, and I find it great. English is not my mother tongue, so I will try to…

    ... there was room enough in ROM for all those new functions ... using the error handling routine (RST #8 ). I have been debugging ... help of The Complete Spectrum ROM Dissassembly and I think it ... /> SCF
    CALL $556
    RST 8
    DEFB 255
    rinconete rinconete March 2009 Sinclair Basic
  • 2 commands in 1 lineHi all, this is my first post although I have visited the web site many times, and I find it great. English is not my mother tongue, so I will try to…

    ... there was room enough in ROM for all those new functions ... single character tokens before the ROM checks syntax so BASIC is ... 3 characters.

    Using RST $08 seems OK.
    Geoff Geoff March 2009 Sinclair Basic
  • BSDOS 309 for MB02+ by DuskyI heard, there is a new version of BSDOS 309 for the MB02 disc interface coded by DUSKY (Nick: UB880D). I have three pieces of MB02 (including a prot…

    ... and contain more patches of RST points, NMI, Divide/Divide+/MB02 ... compatibility. One version of BS-ROM+BS-DOS is compatible with ...
    velesoft velesoft April 2009 Sinclair Miscellaneous
  • Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…

    ... on, but if either Z80, ROM, lower RAM or ULA were ... /> [*]bad contact between ULA & socket. Try pulling out & re ... -seating the ULA in its socket
    [*]dried up electrolytic capacitor ...
    RetroTechie RetroTechie April 2009 Hardware
  • Amiga 600HDOk so I have an @*%#$&@*# Amiga 600HD (I shall avoid using the C word around here) and now a PSU. I have plugged it into my TV and it's telling me I …

    ... way , you should check your ROM version at boot (purple screen ... you need to do a ROM upgrade. If so, try obtaining ... coloured metal plate near the socket side, see: [url]http://pc ...
    Arda Arda April 2009 Chit chat
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... ; end printing if so
    rst 16 ; do the printing of ... /> The BASIC-interpreter in the ROM makes sure this is done ... then the printroutine from the ROM is used to print the ... character.
    The ROM-routine excepts the character to ...
    Dr BEEP Dr BEEP April 2009 Development
  • Need to read code start and length from a +3 diskso i can transfer them to my internal ZXMMC interface and my mind has died as to how to do it (i know how to for a tape) any help or a general kick i…

    ... back to the 48 BASIC ROM.
    ;
    finish:
    push ... /> ;
    ; TODO: Handle errors with RST 8 rather than returning them ...
    John Elliott John Elliott May 2009 Sinclair Miscellaneous
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
rom 15.6K 29.7K
rst 1.2K 2.5K
socket 4.3K 6.2K

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