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Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... is a call to the ROM routine that scrolls the screen ... =";s:
INPUT "Press Enter", LINE a$: RUN : DATA 36,255 ... -
Listing games codeHow do you break into and list the programming for a game? I know Football Manager just required you to press the BREAK key, but what about others w…
... you can use an alternative ROM with an NMI break routine ... - e.g. the "Gosh Wonderful ROM". Then it is just a ... will arrive at the command line with an error report "T ... -
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 ... , the Spectrum exposes a line called ROMCS at the edge ... in a Spectrum (both ROM and RAM) has what ... line asserted. In a 48K model, this will either be the ROM ...
Concentrating purely on the ROM, when the Spectrum reads from ... -
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 …
... pin chip. Trace each signal line from the edge connector (presumably ... Z80 wants to access the ROM. You can immediately see for ... -
What's everybody reading at the moment?I'm reading: Jame's Herbert's latest (picked up from Tescos for ?3 odds) The Forgotten Man by Robert Crais Shout at the Devil by Wilbur Smith (part …
... 'm reading 'The Complete Spectrum ROM Disassembly'... ;)[/quote]
*Grumble ... did look at the on-line "version" and liked it ... too ... -
I have joined the Dark SideGone and bought a PS3 that is. Even after all of the posts I made about not getting one as they were so expensive I succumbed and sold my 360 (and o…
... limited to top-of-the-line DVD players. Upscaling games requires ... AV cable, while upscaling DVD-ROM (including DVD Video content) requires ... -
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…
... completely black screen because enough ROM code should be able to ... of BS, check the Spectrum ROM disassembly to make sure it ... the absence of the -5v line, which is likely to have ... -
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…
... the MREQ line (connected to the pin 20 on the ROM). I ... 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?
[ ... the absence of the -5v line, which is likely to have ... -
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…
... threshold for the CS line on the ROM chip to be ... 2.5v (hence the ROM is probably not being selected ... The ROM is separated from the CPU's MREQ line by ... less 'stiff' on the ROM side because of this. However ... impedance of the ROM chip's CS line should be megaohms ... -
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…
... mapped at address 0x0000 and ROM mapped at 0x8000, and held ... ROM, and switched the address mappings!
Incidentally, the write line ... -
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…
... now. It was really the ROM that was causing problems. I ... ). I now get the copyright line on the screen after power ... of all things only the ROM got damaged is beyond me ... -
Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…
... as the CPU clock, M1 line, address and data bus lines ... picture on the TV. The ROM masks out the Speccy's ... it works with a broken ROM. Then there's the battery ... tests, as well as a ROM CRC and interrupt test.
Another TS Emu CartLooks like the one I have. [url]http://cgi.ebay.com/TC2068-Cartdrige-48K-emulator-for-Timex-Computer-2068_W0QQitemZ250133271074QQihZ015QQcategoryZ124…
... pullup resistor attached to the line inside the computer that keeps ... to match the Spectrum's rom disable signal which can also ... filled in by the Spectrum ROM on cartridge, which is good ...UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
... upper bank, and from the ROM to the screen...
line (i.e. 8 )? Also, if ...Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... "BBC Micro" and The M128 ROM I sent you...)
line high would instead prevent the ...Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... memory". Pulling high the MREQGE line in your circuit suggestion would ... still be talking to the ROM and upper memory bank.
New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... , it has 1024KB RAM, onboard betadisk interface, slot architecture and AT ... very unclear.
The firmware (ROM) of the machine is fully ... binary files for CPLDs and ROM. You'll have to order ...New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... with trying to achieve Spectrum ROM compatibility.
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... are tied to it because BetaDisk was the only controller ... except one thing. Sinclair ROM implements a state machine for ... machine). This results in ROM constantly trying to uninstall your ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... command ($0EB2) of the Spectrum ROM is a neat routine that ... the address of the next line down the screen. You should ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... position of the first character line in HL
2) ... character
; The ROM routine gets the line start from the row ... address of start of character line
_oneLineLoop
PUSH ... on to the next screen line.
; Alternatively could get HL ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... character
; The ROM routine gets the line start from the row ... address of start of character line
oneLineLoop
... on to the next screen line.
; Alternatively could get ... the next line
; This is different from the ROM COPY ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... to move down one scan line
uint d_PrintDoubleW(uchar ...
asm("call\t56"); // call ROM isr so basic can coexist ...switchable ROM`sHi all, As I own a few Spectrum and Commodore computers, I am wandering a few years ago on the C64 there was a switchable ROM the normal C64 and a Ji…
... , there was never a commercial ROM switcher for the Spectrum - no ... it was just the two ROM chips, piggy backed, pin for ... with the exception of the ROM CS line, which was taken high ... got in mind, the GW ROM maybe? :)Early Version Betadisk Manual (ie anybody have one)Folks, after lengthy excavations in my attic I have dug out my old Betadisk interface and 720K drive. However the manual has done missing. It's wa…
... soundcard) you may load a ROM image from disk to RAM ... a flooded house (so the betadisk is a little down the ...Codies CD packDoes anyone remember Codemasters CD pack of 30 games from around '89? If so was this the only release of its kind on the spectrum or was there more C…
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And I LOVE the line, "The capacity of a Codies ... found that the first CD-ROM standard, red book, was published ...Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... :"AND PEEK 50014=3)+("Run line:"AND PEEK 50014=0);start ... MC routine (in the DATA line) was:
[code]221 ... /> 205,86,5 CALL ROM (Load) ;Execute ROM's LOAD BYTES
Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... number that the ROM uses for calculations. The line 2 above can ... to EDIT such a line, the internal ROM representation is removed and ... highlighted numbers above WITHOUT editing line 2, you can have the ...Early Version Betadisk Manual (ie anybody have one)Folks, after lengthy excavations in my attic I have dug out my old Betadisk interface and 720K drive. However the manual has done missing. It's wa…
... .com/albums/bb155/cta-102/Betadisk%20Interface/"]http://s211.photobucket.com ... /albums/bb155/cta-102/Betadisk%20Interface/[/URL][/QUOTE]
[QUOTE=Kilby;211216]OK the ROM has been uploaded to WOS ... Beta 128, except for the ROM.Multiple ROMsI'm mulling over the idea of a bit of hardware with a ROM in it, which has some commands that can be called by BASIC (like the old wafadrive star com…
... Interface 1 checks the ROMCS line on the connector at ... try to page its own ROM in (even when PC ... want to use some IF1 ROM commands (eg for Microdrive ... temporarily disable the divIDE+ etc ROM, do that and then ... re-enable the ROM.
So, if ...
