-
Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
... /> - shadow OS / by rewiring RST 0x00 /,
- ROM extensions,
- IM1 routines ... check the ROM code at location 0x0028 (=target of RST 0x28 call ... therefore hook into RST 28.
QUESTION: disclaimer ... ROM overwrites address ... -
ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …
... calling a routine in ROM-1 from ROM-0 so that when ... the routine in ROM-1 executes a RET instruction ... assume routines in ROM-0 will use a RST instruction (it doesn ... address of the routine in ROM-1, which means the paging ... -
Monitor/debugger that doesn't use the Speccy ROM?Was there ever a Spectrum monitor/debugger released that didn't use the ROM, for key input and character output routines? The reason I ask is that i…
... that didn't use the ROM, for key input and character ... appear to use the standard RST 10 for character output, but ... -
Bizarre stuff in Interface 1's shadow ROMAccording to the Complete Shadow ROM disassembly, the function that exits back to the BASIC interpreter after interpreting IF1 commands is this: [co…
According to the Complete Shadow ROM disassembly, the function that exits ... Return address to main ROM is
05CC RST 18,CHKSYNTAX STMT ... />
Now look at the RST 18 routine:
[ ... what's REALLY in the RST 18 routine? The disassembly contains ... -
128 ROM paging alternativeWould this work (with the appropriate code in each ROM)? [code] ; 128 rom paging routine ; use rst 28h with call address stored after restart ;;rom…
... /> [code]
; 128 rom paging routine
; use rst 28h with call ... next instruction after the original rst
; and address
[/code ... -
Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…
... hardware automatically unpages the shadow ROM. As the RET instruction ... br /> ld (5cedh),hl
rst 8
db 32h ;CALL ... 1 partially decodes the shadow ROM and therefore, the last ... -
using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…
... it possible to use the ROM's FP calculator to evaluate ... />
stack A : stack B : rst $28 : divide : end_calc
stack ... C : stack D : rst $28 : divide : add : end_calc
rst $28 ... end_calc" sequence? -
DIVIDE versus ZX128 ROMDivide interface use hardware mapping of extra memory on this fixed points in 48rom: #0000 - power-on/reset/rst0/software restart #0008 - syntax erro…
...
#0038 - im1 interrupt/rst #38
#0066 - nmi ... often connect only 48rom(rom 1) after each reset ... use autodetection of zx rom type (detect if is ... mapping points in external rom memory. Also exist next ... ROM0, then this ZX128 rom can be compatible with ... -
Rotronics Wafadrive v.1.80 ROM - Corrupt or purposely broken?I've been digging around the Wafadrive v1.80 ROM (from [URL="http://zxspectrum.it.omegahg.com/_RO.htm"]here[/URL]) and can't decide if the ROM is cor…
... around the Wafadrive v1.80 ROM (from [URL="http://zxspectrum.it ... can't decide if the ROM is corrupt, or has been ... -code-error
;
l_0d2b: rst $20
defb $13
ROM images to compare against, so ... -
RST hooks in OpenSE BASICHi, any possibility of OpenSE BASIC having RST vectors rewired to a small table in RAM containing jumps back to apropriate ROM locations? :grin: It i…
... possibility of OpenSE BASIC having RST vectors rewired to a small ... containing jumps back to apropriate ROM locations? :grin: It is an ... vectors that are located in ROM to user mode applications. (hint ... an alternative...is there any ROM left for a small monitor ... -
ROM Calculator TrigHello, These Christmas holidays I finally have time to devote myself a little to the speccy . I have a question about how the ROM calculator implem…
... a question about how the ROM calculator implements cosine.
... CALL GEN_ENT_1 ;In effect a RST 28H instruction but sets the ... approximation used in spectrum ROM just a simpler procedure.< ... CALL GEN_ENT_1 ;In effect a RST 28H instruction but sets the ... -
Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …
... problem with the pixel address rom routine at 8874.
Going by the ZXSpectrum Rom Dissassembly book, I'm trying ...
ld (hl),a
rst 16
ret[/code]
RST 16 it comes up blank ... -
Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …
... to enable the uSpeech ROM is this Booty code ... br /> ld a,$11
rst $10
And ... intention is for the RST instruction to call address ... instruction above) the uSpeech ROM is executed. The Z80 ... in the ZX Spectrum ROM which looks like this:< ... -
NMI Routine and Restarts in a new 128K ROMI'm presently engaged in creating AGD 5 with the intention of making it a pair of 16K ROMs for the 128K/+2. I'm fairly sure that the vast majority o…
... my use of the RST slots, especially RST 8. I know there ... I'm open to suggestions. RST 0, 16 and 56 are ... grabs. RST 8 wasn't supported in the original ROM 0 as ... the delay routine in RST 0 overran ... -
New WoS CD-ROM Project[url="http://neuro.zensoft.net/woscd/"]http://neuro.zensoft.net/woscd/[/url] I'm about to embark on an ambitious project ... to create new up-to-dat…
... />
- WoS Basic Archive CD-ROM (1 disc) - UKP 5 inc ... ;P
1x CD-ROM incl. Games, Emulators, Remakes & ... also considering a tech CD-ROM, excluding the games, but including ... -
Emulators and ROM'sHi - This is my first post here, although I have been visiting WoS for ages.... I have been on quite a few multi-platform sites that offer downloads …
... good collection of emulators and ROM's that they would be ... -
Spectrum ROMI downloaded some text files (they are actually the spectrum ROM files but in text) which can be compiled using TASM (or soemthing). I read on WOS th…
... (they are actually the spectrum ROM files but in text) which ... -
ZX PC Interface : The manual, schematics and more info... ZX <-> PC Interface ------------------- Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…
... / Distribution
4.1) ROM
4.2) Interface
The ROM will do syntaxchecking for the ... from the
original ROM, which makes headerless loading still ... /> part of the ZX ROM.
RST 8 is also altered ... -
ZX PC InterfaceZX <-> PC Interface Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Installation 2.1) The softwa…
... Distribution
5.1) ROM
4.2) Interface < ... from the
original ROM, which makes headerless loading ... tape.
RST 8 is also changed, but ... /> You now can make RST 8 to call to your ...
5.1) ROM
The copyright of ... -
Rom Cartridges Wanted - ?25 to ?35 for each title!Hi I am after any Sinclair Interface 2 Rom Cartridges that anyone wants to part with! I will pay ?35 for any Ultimate title or ?25 for the rest. The…
... after any Sinclair Interface 2 Rom Cartridges that anyone wants to ... -
rom cartsrom carts wanted , ill pay a fair price if anyones prepared to sell any , i have backgammon and cookie but any others would be most welcome
rom carts wanted , ill pay a fair price if anyones prepared to sell any , i have backgammon and cookie but any others would be most welcome -
A great ROMBack in the early 90s my ZX clone (called "Cobra" if anyone's interested) had a sort of a "SamRam" (actually an alternate ROM accessed via a NMI) tha…
... a "SamRam" (actually an alternate ROM accessed via a NMI) that ... or downloads regarding this great ROM and was surprised to find ... absolutely magnificent. I have the ROM (there are also some scarce ... even (!) some of this alternate ROM's routines.
... -
Two Rom cartridges for sale and tapesAfter coming back from my parents for Xmas i've finally cleared out a ton of my old stuff. Found JetPac on ROM for the Speccy (no instructions) and …
... .
Found JetPac on ROM for the Speccy (no instructions ... -
New ROMAlthough commenced in late November, it is only now in the last few hours of 2003 that the "Gosh Wonderful" ROM gw03.rom has attained a release state…
... that the "Gosh Wonderful" ROM gw03.rom has attained a release state ... -
Convert .TZX to .ROM filesI own some ISO ROM files (from Individual Software) in the TZX format. How can I convert that to .ROM for use with an emulator? Where can I get other…
I own some ISO ROM files (from Individual Software) in the TZX format. How can I convert that to .ROM for use with an emulator? Where can I get other .ROM files? -
ROMDoes anyone have a complete list of the routines in the ROM of our beloved ZX Spectrum? Thank you. [ This Message was edited by: wilsonsamm on 2004-…
Does anyone have a complete list of the routines in the ROM of our beloved ZX Spectrum?
Thank you.
[ This Message was edited by: wilsonsamm on 2004-02-08 16:57 ] -
Wanted Software to Swap for Rom Carts ;)Wot I have for grabs is 4 Complete ROM Carts which I will swap for my wants below Horace [url="http://www.cornishdavey.dsl.pipex.com/4.jpg"]http://w…
... for grabs is 4 Complete ROM Carts which I will swap ... -
simple z80 rom for test my emulatorHi there! Does anyone here have a very simple rom(in Z80 format) for testing my emulator. I need a very simple one that implements few opcodes and po…
Hi there!
Does anyone here have a very simple rom(in Z80 format) for testing my emulator. I need a very simple one that implements few opcodes and possible show a simple graphics. -
RST 16 with TASMCan any body tell me what is wong when I assemble this test code with TASM : ;print a long string "help me" start .org 32000 ld a,2 call 5633…
... ,(de)
inc de
RST 16
jr loop
RST 16
Is it ... -
Sinclair Spectrum System Test Rom CartridgeSinclair Spectrum System Test Rom Cartridge. [url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=50224&item=8106735040&rd=1&ssPageName=W…
Sinclair Spectrum System Test Rom Cartridge.
[url="http:// ... that unlike other commercially realeased ROM carts, this one DID NOT ...
