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Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…
... print the contents of the Program Counter on the screen (away from ... tell if a game or program had crashed because the PC ... remain constant with a running program, but I want to check ... -
Solution for overwritten stack in 48k SNA filesIt has been known for quite some time now that the 48k SNA file format has one serious fault, which is described in the file formats section on the W…
... in a file separately, the program counter is pushed onto a stack ... 2 bytes of data (or program code) in RAM and therefore ... registers and memory, pops the program counter from the stack and then ... -
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... dont know where the program counter is when im2 is ... frame.
; Have a counter, when it reaches target, ...
up:
; Y Counter
LD A,(IX+3 ... )
; 8 = RO:Pause Counter
; 9 = Pause Target, ... -
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…
A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…
... RST #8 - presumably when the program counter hits 0x0008 (i.e. an ...some debugger in emulators that is able to brakpoint when a mem address is accessed ?Is there a debugger (disassembler) available in some emulator that is able to stop (breakpoint) when a particular memory address is accessed ? For e…
... ) and to see where the program counter has stopped. In other words ...Interface 1 ShadowROM pagingI read the Interface Shadow ROM Disassembly book. I wondered how that rom calls the interface's rom paging mechanism. It doesn't! I learned there is …
... address Speccy fetches instructions. When program counter reaches 8 (error routine) or ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
PC is short for program counter - without it the Z80 doesn' ...Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
... operation WAS zero), then the program counter will increment as usual and ... the program will continue with the instruction ... WAS NOT zero), then the program counter will be set to the ...what is tr-dos ?well you saw the topic [img]/__forums/images/smiles/icon_smile.gif[/img]
... soon as the Z80 PC (program counter) is within a certain range ...HELP about jet set willyHello to all! After to have loaded the game, demands for the codes come me. Which are? I do not succeed to enter in the game. Thanks to all!
... />
Now just set your program counter PC to 87CA to check ... and then return to the program...
Voila! Game starts ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... locate the start of the program. So start to disassemble from ... /> So lets just alter the program counter PC to start executing at ... br />
Return to the program and LOL the game starts ... .
Instances where the program accesses EA44H are at:
Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... /> RETI
Description. Pop the program counter (PC) off the stack. This ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... dont know where the program counter is when im2 is ... frame.
; Have a counter, when it reaches target, ...
up:
; Y Counter
LD A,(IX+3 ... )
; 8 = RO:Pause Counter
; 9 = Pause Target, ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... dont know where the program counter is when im2 is ... frame.
; Have a counter, when it reaches target, ...
up:
; Y Counter
LD A,(IX+3 ... )
; 8 = RO:Pause Counter
; 9 = Pause Target, ...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…
... (for instance, z80_pc being the program counter which is a 16 bit ... -States to complete. Keep a counter, and when you reach 69888 ...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…
... (for instance, z80_pc being the program counter which is a 16 bit ...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…
... ? This also applies to the program counter - if tehe PC value gets ...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…
... ? This also applies to the program counter - if tehe PC value gets ...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…
... ? This also applies to the program counter - if tehe PC value gets ..."Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]
... 6502 has:
1 Program counter
3 General Purpose Registers ... /> the Z80 has
1 Program counter
14 General Purpose Registers ...Checksum RoutinesHi there everybody, Does anyone have an 'off the shelf' assembler routine for generating checksums? Thanks Jim
... build and my BASIC checksum program works fine.
' ... emulator need not check the Program Counter with every instruction to ... the Sinclair Research 1985 'Test Program' downloadable from this site' ... Dr. Ian Logan's program and found the checksum routine ...Print routine for BASIC (or BASin)For anyone interested there's a crappy binary here to print characters from BASIC at pixel positions. Import the binary at 60000, USR 60000 to initia…
... . Track the progress of the Program Counter in a debugger, and you ...The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... the debugger window if the program counter is ever in the ROM ...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 …
... RST 0H will push the program counter onto the stack, something that ...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 …
... the hardware paging when the Program Counter his 11182 rather than attempting ...Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…
... 's routine will push the program-counter onto the stack, most likely ...Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…
... in big popularity.
PC (program counter) is 16-bit in practically ...How do debuggers guess mnemonicsLet's suppose I have the following numbers in Spectrum memory: Address Byte 30000 1 30001 2 30002 3 30003 4 If I execute in assembler j…
... much sense.
The program-counter (usually) points to a valid ...
