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FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... the breakpoint with another instruction (such as HALT) as there is for ... -
Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... so it returned to the instruction after HALT.
I'm ... -
Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... a HALT, the stacked PC is the instruction just after the HALT.< ... br />
I had thought that HALT ... Refresh register increments while the HALT is executing, and so ... is *not* incremented while HALT is being executed, however, ... -
Cheetah SWEET TALKERJust got a bundle of hardware including one of these. I gather its a speech synthesizer in the mould of the currah microspeech. How do i test if it…
... software. If there is no HALT/WAIT then the software races ... ) paged in and out on instruction at 0x38.
Memory mapped ... -
Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... variables, do this:
[code]halt
ld a,(23624)
[/code]
The OUT instruction and the first LDIR actually ... with the current attributes. The HALT at the beginning ensures you ... -
Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... variables, do this:
[code]halt
ld a,(23624)
[/code]
The OUT instruction and the first LDIR actually ... with the current attributes. The HALT at the beginning ensures you ... -
Pause XWhat would be the best way to implement a short delay (unlike with basic, without any key detection to cut it short) in assembly ? Basically somethi…
... carries on with the next instruction being a JP.
loop:
HALT
DJNZ loop[/code] -
Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…
... the trick is to use HALT to wait for an interrupt ... .
So do a HALT, read a byte from 23672 ... address and make your first instruction NOP, so you can actually ... -
Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... ' I know distinguishes between executable instruction code and data tables or ... without causing the system to halt.
[QUOTE=joefish ... -
Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... the Z80 finishes the current instruction before servicing interrupts to ... afterwards, with the usual HALT active in time for the ... CPU was executing a specific instruction. After that it poked ... equivalent inert version of the instruction for the real interrupt ... -
RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
... set to 0000? The instruction inmediately following HALT is PUSH DE, so ... . [B]The PUSH DE instruction was indeed executed... after a ... !!??!![/B]
The instruction following PUSH DE is LD ... , I can assume that this instruction fails to execute.
... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... fetch instructions while in the HALT state? (that is: repeated ... is ignored and a NOP instruction is forced internally to the ... fetched repeatedly, is that the "HALT" opcode's location (PC ... ), or the next one (instruction after the HALT) ?
Any ... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... fetch instructions while in the HALT state? (that is: repeated memory ... question appears. One says that instruction like LDIR, LDDR, CPIR, CPDR ... when it is repeating. Such instruction has 2-byte opcode (it ... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... CPU keeps fetching the instruction following the HALT, but discards it.< ... question appears. One says that instruction like LDIR, LDDR, CPIR, ... when it is repeating. Such instruction has 2-byte opcode ( ... executing the newly formed instruction.
Patrik -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... fetched repeatedly, is that the "HALT" opcode's location (PC unchanged ... ), or the next one (instruction after the HALT) ?[/QUOTE]
I ... -
Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... time each Z80 instruction spends on every instruction is documented. ... 33000
Main halt ;wait until interrupt
... ld hl,NewFrame
halt ;wait until interrupt, which ... -
Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... b,ULAPLUSDATA
halt ;wait until interrupt
... ld hl,NewFrame
halt ;wait until interrupt, which ... to insert a JP instruction to
;start ... -
New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... IN A,(C) must be instruction AND #1F because on data ... set. Fix is easy, add instruction AND #1F after IN A ... data bits.
EI
HALT ;time after INT/begin of ... -
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... byte call could overwrite next instruction too and breakpoint would therefore ... except with RST or HALT? But a HALT will require overtaking entire ... -
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... byte call could overwrite next instruction too and breakpoint would therefore ... somehow?) except with a HALT? But a HALT will require overtaking entire ... -
Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…
... one won't occur. And HALT will lock things up if ... . Then you do EI and HALT in your main program to ... that EI immediately followed by HALT is guaranteed not to have ... actually delayed until the following instruction occurs). -
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... just use [font=Courier New]halt[/font] instead?[/quote]
halt[/b] instruction. -
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
[quote="Einar Saukas;887976"]Yes.
[b]NIRVANA_halt()[/b] is just a macro in C and Boriel's ZX BASIC for the [b]halt[/b] instruction.[/quote]
Sweet, thanks! -
Communal Project for ASM NewbiesHi Folks, I tend to learn best by trying stuff and then going through the pain of it not working so that I can research and fix mistakes. I suspec…
... after a [font="Courier New"]halt[/font] instruction, and it should be ... -
CASTLE CAPERSThe Dream Fairies have been kidnapped by the evil mouse king and his horrible accolites Use your magic to make blocks or holes and go up and down t…
... port 31 must game use instruction AND 31 for erase all ... uncontended) via this code:
HALT
LD C,0
Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…
... and interpret as an instruction. PC is automatically incremented ... a JP instruction).
An instruction fetch is one ... interrupt acknowledge, nmi acknowledge, halt, bus acknowledge. In summary, ... read as its first instruction or indeed any ...What if...Just out of Friday's curiosity -- was there a ZX Spectrum emulator for Sinclair QL? Could there be one? Would it make a difference if there was one i…
... />
Reading a single byte instruction (best case) and then calling ... ...
Unless that instruction was HALT... it could probably emulate that ...
