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R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... to externally trigger the Z80 reset line because the reset circuity does not ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... knowledge (about externally triggering the Z80 reset line...) I've become pretty ... have some extra memory ICs, Z80, ROM, and a spare ULA ... few minutes running it would reset, lock up. It ended up ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... br />
BTW. Triggering the Z80 Reset line is simple. There is ... a reset "pin" on the edge ... then the Z80 will be held in reset. Releasing the reset line takes ... the Z80 out of reset. You ... -
Tech question about microdriveshi ! I dont know if someone out there can help me I recently got my paws into an interface 1 and 2 microdrive units form an ebay auction they wore …
... you've discovered doing a Z80 Reset (pressing Reset button) does nothing!
Broken +3I have noticed that some members on this forum prefer to repair Spectrums instead of just buying another one from ebay. I would like mine fixed at so…
... memory or Z80, at a first glance.
As your reset button ... cable. Remove the Z80. Locate pin 26 on the Z80 (RESET) and solder ... RESET condition (i.e. when you remove the wire), then your Z80 ... , then remove the "reset mod" and leave the Z80 in its original ...Which machine should be emulated at startup?The [url=http://www.worldofspectrum.org/forums/showthread.php?t=37743]previous poll[/url] produced a fairly convincing majority of people in favour o…
... with RAM wiped and the Z80 reset'
my thinking is ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... it be possible that the reset line (cpu?) become stuck in ... on my +3, when I reset it, it displays a black ... noticed pin 26 on the z80 (reset) goes to IC15 pin 1 ... and to pin 2 (RESET button).
Btw, if it ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... it be possible that the reset line (cpu?) become stuck ... on my +3, when I reset it, it displays a black ... noticed pin 26 on the z80 (reset) goes to IC15 pin 1 ... and to pin 2 (RESET button).
Btw, if ... while the ASIC is held reset because it will display the ...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…
... might also experiment with the Z80 reset signal, see if I can ... pin down whether AF' is reset to #ffff or whether it ...ZXMAK2Hi everyone, I'm glad to present you the latest version of my emulator - ZXMAK2 :) There are a lot of changes were made since the last topic about t…
... the HDD emulation.
Fixed Z80 reset behavior.
Some fixes to ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... , do we agree that at Z80 reset (including power-up), the Disciple ... is quick enough, when the Z80 "captures" the instruction data from ...Need some help repairing an issue 3 spectrumI am looking for some help repairing an issue 3 speccy, here's what I tried so far. The speccy is not booting up correctly, when using the diagnos…
... screen RAM.
The reset line problem is strange. Is ... the /RESET line shorted to something else ... />
You can hold the Z80 reset pin high via a temporary ... use a capacitor and temporary reset switch in order to allow ...Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …
... 100V or 50V / 63V Axial Z80 /RESET
C28 22uF 25V Axial ...Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …
... 100V or 50V / 63V Axial Z80 /RESET
C28 22uF 25V Axial ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... supply correct?
Does pressing reset have any effect? If you ... probe/'scope, also monitor the Z80 reset pin.
Is the CPU ... to pin 6 of the Z80?
What is the state ... the HALT, WAIT, INT, NMI Z80 inputs?
Are the MREQ ...Z80 Special ResetThe Z80 CPU has two types of reset, normal and special. The latter is little-known and for more information please see [url]http://www.primrosebank.n…
The Z80 CPU has two types of reset, normal and special. The latter ... ]http://www.primrosebank.net/computers/z80/z80_special_reset.htm[/url]
reset or my article would be ...z80 Startuphi everyone, does the z80 upon start up reset all registers (including A) to 0? Many thanks, Robin
hi everyone,
does the z80 upon start up reset all registers (including A) to 0?
Many thanks,
RobinKiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…
... ,
Nearly made my z80 computer with 2K ROM 32K ... , $2A ;LOAD A WITH RESET SDA RESET SCLW RITE MODE (00101010)
RESET SDA RESET SCL READ MODE (00100110)
RESET SDA RESET SCL READ MODE 00100110
Z80 snapshot formatI read documentation for Z80 snapshot on WOS and see in table possibility insert ROM image to Z80 file. Here is full table: [code]The pages are numb…
... possibility insert ROM image to Z80 file.
...
2 - [B]rom (reset)[/B] samram rom (basic)
Z80 file ? I test ZX ... 't save Z80...).
Here is Z80 snapshot 128kB with ...Z80/SNA Compiler under Windows???Does anybody know anything about Z80/SNA compiler under Windows???
Does anybody know anything about Z80/SNA compiler under Windows???Z80 to DSK?Does anyone know if there is a prog that can convert z80,tzx or tap files to dsk format? I have access to a friends pc that has a 3 inch drive which …
... a prog that can convert z80,tzx or tap files to ... looked at a program called z80 snapshot loader at
[url ...Z80/SNA compiler under Windows???Does anybody know anything about Z80/SNA compiler under Windows???
Does anybody know anything about Z80/SNA compiler under Windows???Visible-Z80 - VISZ80 - by Miklos Patrubany Hi All ! Visible-Z80 - VISZ80 - by Miklos Patrubany Does anyone have this program ? Please help me. I want to learn Z80 and Assambler on Z8…
Hi All !
Visible-Z80 - VISZ80 - by Miklos Patrubany
< ... want to learn Z80 and Assambler on Z80 and I have a ...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 …
... could help me decipher this z80 assembler code?
ORG ... /> EA6C 3680 LD (HL),80H ;reset digit to zero
EA6E ...Converting TAP to Z80Is there an EXE out there that will convert *.TAP into any other snapshot (preverably Z80 or SNA) Please Help Oatesy
Is there an EXE out there that will convert *.TAP into any other snapshot (preverably Z80 or SNA)
Please Help
OatesySNA 2 Z80Hi Is there a difference between an sna file and a z80 file.Is it possible to rename the sna extension to z80 or do I need a conversion utility.
Hi
Is there a difference between an sna file and a z80 file.Is it possible to rename the sna extension to z80 or do I need a conversion utility.SPIN Public Beta 0.1b Available for downloadHi all, back again, and as just recently announced on CSS, SPIN has been updated. Here's the post to CSS (or the relevant parts): It's been a bu…
... /> 128k snap saving.
Fixed Z80 block compression
Fixed a ... +3 code
Changed Reset Icon to a power icon ...Z80 Stealth Emulator probsI have problems with my soundcard. I have an ESS1868 sound card and on most DOS programs I can use Adlib compatibility to get sound. Sometimes Soundb…
... to the problem:
Z80 stealth looks for Ess688 (or ... enable SBP support and boot Z80 stealth, but no go. Says ... . run it and then run z80 stealth. no luck. It still ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... a challenge for all you Z80 programmers. Points to be awarded ... make it difficult, the first reset bit encountered is not to ...
