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TommyGun's getting a Debuggerhttp://youtu.be/B_kZVRvYV98 I have always wanted to debug the programs I write in TommyGun using TommyGun instead of the debuggers in emulators. …
... this.
I hi-jacked rst 16 (rom print - i never use ... -
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? -
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 ... -
Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…
... external 32kB ram + 8kB rom memory(reflashable eeprom). Eeprom memory ... /> [B]#8[/B] (rst 8 / errors)
[B]#38[/B] (im 1 ... protect are used instead 8kB ROM(rom emulation). From adress #2000 ... (bacause ram 3 contain ROM image for rom emulation). Then only ram ... -
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 ... -
ZX48k terminal...Hello everybody, I thought someone might help me. I connect my good old ZX48k to my PC via serial (IF1) link, and I was trying to write a little term…
... you were using "code &38" to refer to the RS232 ... code for a Version 2 ROM could look this if you ...
ld (HD_11),hl
rst 08
db &32 ... -
New SPIN 0.3a releaseHi all, here's the next version - mainly a maintenance release, with new bugs :) Here's what's new: V0.3a - Bugs and more tapes -------------------…
... :38, aowen wrote:
It's actually there in the original ROM ... />
original
--------
EF RST #28
EF15 DEFW #15EF ... LD A,#20
D7 RST #10
patched
Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... -04 12:38, Dr BEEP wrote:
RUN goes to ROM-routine ... />
LD A,65
RST 16 ; PRINT A
JP ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... -04 12:38, Dr BEEP wrote:
RUN goes to ROM-routine ... />
LD A,65
RST 16 ; PRINT A
JP ...I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... bug or not. The command "RST 38H" is the problem. Simply ... PC = the decimal value of 38? Or am I using the ... does = 38 decimal then it seems that the speccy 48 rom I ... to memory address 38, which has the opcode RST 38H, thus making ...I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... cannot differentiate between 38H and 38, cannot understand binary, cannot convert ... web.
If 38H = 38 (which I assume it does ... 0038 in the ROM image, there is another RST 38H command - thus ...Competition: Sadistick routine on Spectrum ROMMy vote goes to BEEPER at #03B5 Let's ear you pick! :) And a great BOHHHHHHHHHHHHH to Dr Ian Logan & Dr Frank O'Hara for their description about the…
... BC,duration
CALL 2D2B ; ROM routine to put value of ... of the calculator stack
RST 28 ; use the floating point ... /> DEFB 05 ; division
DEFB 38 ; end-calc
LD A ... ,note
CALL 2D28 ; ROM routine to put value of ...Calling ROM routinesFirstly, sorry if this is the wrong forum to post this in, but I wasn?t quite sure under which heading is best fitted. I?m trying to figure out how…
... /> "Rubber Numbers in the Spectrum ROM" - a very helpful article.
CALL $2D28 ; STACK-A
RST 28H ; enter calculator
DEFB ... $28 ; sqr
DEFB $38 ; end-calc result is still ...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< ... call $1d43 ; f994 cd 38 1d $11ts
ld ... jr c, l_fa4e ; fa41 38 0b $0c/$07ts
...MOD calculator function?How do I for example, do LET a=(MOD n,9). I can do it a long winded way using cross-addition until the answer is a single digit. So 13763 MOD 9 wou…
... MOD would be
RST 28H ;; FP-CALC
DEFB ... $02 ;;delete ;MOD.
DEFB $38 ;;end-calc
DIV ... .
As an experimental ROM, modify OR to do the ...Minor Update to Gasman's Midi2BEEPDon't know whether this is worthy an announcement, but for those of you who enjoyed Gasman's midi2BEEP utility, a new variant has been made called mi…
... yes, I find the whole rom calculation routines something of a ... of duration (5/255)
RST $28 ; use the floating ... on the stack
DEFB $38 ; end-calc
... code to tell the rom routine to do a ... beep routine in the rom already seems to make ...
