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A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
... 48k machines and couldn't test the interface on anything else ... CPUs that have a faulty /M1 line. It is also unaffected ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... to load some program and test the machine did not worked ... have a faulty Z80 cpu (M1 line), replace it and you ... -
Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…
I just wanted a quick test for real hardware.
... to detect different versions of M1 ROMs around. ;) -
Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…
... ROM. ;)[/QUOTE]
My M1 ROM has the same value ... it is really a good test for our aging hardware. ;)
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…
... (and the Z80) is named M1. Again, I imagine this a ... the Disciple and PlusD were test beds for SamCoupe technology and ...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…
... being careful to ensure M1 cycles don't occur ... 0x7ffd or rely upon M1 cycles only occurring for ... certain addresses, or otherwise test the contents of ROM ... /> [QUOTE]I find blocking M1 in this way the simplicity ... favour of peripherals taking M1 and ANDing it with ...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…
... to the situations where an M1 cycle would have been initiated ... /> [*]Having inverted logic in the test for disciple_active when applying memory ...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…
... the 'valid'). The addition of M1 makes the thing fire while ... is that in your hardware test, you had the LD HL ... case, how similar was your test, timing wise, to the DISCiPLE ... the appearence of a following M1 (or other trigger) is not ...2013 projects: new PlusD, DivIDE and MultifaceI have written about this before, but as I want to let these project be influenced by your opinions, I thought to create a separate topic about it. …
... . Why ? For instance to use test ROMS or alternative Basic ROMs ... . With faulty M1 line you can do nothing ...+2 Grey NMI problemMy shonky old +2 has always worked very well until recently, ive found that hitting the nmi button on my multiface will either do one of three things…
Is there a way, without an oscilloscope, to test the M1 line on the Z80?+2 Grey NMI problemMy shonky old +2 has always worked very well until recently, ive found that hitting the nmi button on my multiface will either do one of three things…
... without an oscilloscope, to test the M1 line on the Z80?[/QUOTE ... :smile:
Other test gear like a logic probe ... a very simple Z80 CPU test circuit. Then you can ... you the state of the M1 line via a LED ... that this is a simple test).
But you ...Fast Z80Todays Spectrums are fast as hell and few software utilises this. Z80 in ReVerSE runs at 42 MHz, in Speccy2010 at 28 MHz, in Pentagon 2.666 and in N…
... cycle bus (not sure for M1 cycles, though). Either you replace ... also Crazy Cars 1/2, Test Drive 2, Super Hang On ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> ld c, (hl) ; m1 to C
inc hl ...
ld a, c ; m1 to A
ld c ... br /> push de ; stack m1 and n1
inc ... result to L
rra ; test for
xor l ; left ... br /> push hl ; stack m1 and n1
sbc hl ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... set
push hl ; stack m1 and n1
ld h ...
bit 7, d ; test for negative
jr nz ... ; clear D
sub b ; test count
org 0x325e ... 0x32c5
s_loop_2:
cp '\' ; test for octal to decimal pseudo ...Diagnostic Board (Winston designed) PCB'sHi everyone, I had these made earlier in the year, built mine then promptly mislaid the others until now :) and I'd like to offer these to the commu…
... . This worked correctly including the "M1 test" and the disabling of the ... I should be able to test some of the 29F040 chips ...IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... signal? What CLK signal? What /M1 signal?, for that matter.
test the first lot of interfaces ...divide problems.Just bought an divide that does not seem to work so I'm asking for any advice here. When I plugin I get the divide screen which then hangs. Press re…
... before shipping, and I always test them here on a rubber ... - so it is not an M1 line issue.
I ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... just be lost and the test will simply continue, but with ... it is very easy to test by just adding one more ... demanding demos do not stress test the emulation enough. Shadow screen ... properly is any clone with M1 delays (Leningrad, Scorpion). I know ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... a way to write a test exposing this, I'll probably ... similar way we already count M1 accesses for RZX replay. It ...SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
[QUOTE=Patrik Rak;758981]The test vectors in my tester cover ... -NOP(s) that you did test, IM instructions, etc. add did ... at the start of each M1 cycle, I will save the ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... sometimes the problem with the M1 signal and even a new ... ]
Bingo! Not a bad m1 line but a different type ... to substitute the z80 to test the M1 line but I've ...DivMMC and K-Mouse Turbo incompatibilityToday I tested a setup someone wants to use, but of which he can't get the K-Mouse Turbo working. The setup contains of: - ZX Spectrum 128K (toastra…
... keyboard interface) with the CPLD-M1 connected to 5V.
Unfortuntately ... Z80 CPU.
Let's test if that works with this ...Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…
... br />
So the M1 line 'died in his hands ... used a test cartridge or something which killed the M1 lines ... But now it seems the M1 problems have to do with ... many interfaces using the M1 line as much as ... Maybe we should buffer the M1 on new interfaces in the ...RTC module for DIVIDE[IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_top.jpg[/IMG] [IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_bottom.jpg[/IMG] [IMG…
... (A7-A0=BIN 00011111) and M1 line is ignored.
[B ... /> AND 195
CP 3 ;test of joypad (D7+D6 must ... /> AND 207
CP 15 ;test of joypad (D7 and D6 ...
;at end of test save state of directions (reg ...New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... chance to sit down and test the Z80 with a scope ... = flat signal 5v
27 M1 = square wave 3.5
z80 reverse engineeringI came across Ken Shirriff's blog today where he is reverse engineering the Z80 from images of a Z80 die. I guess this may be of interest to those of…
... finding that the Z80's 'M1' line has stopped working in ... 't do any sort of test that would catch this, but ... clear to me whether the M1 line itself is particularly susceptible ...z80 reverse engineeringI came across Ken Shirriff's blog today where he is reverse engineering the Z80 from images of a Z80 die. I guess this may be of interest to those of…
... finding that the Z80's 'M1' line has stopped working ... t do any sort of test that would catch this, but ... clear to me whether the M1 line itself is particularly ... I don't know, but M1 is not used on the ... /> Maybe the thing is that M1 are "misterious" (hey, my ...ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... are pulsing clock (pin 6) /M1 (pin 27) /RD (pin 21 ... every 50mS.
Then test the /CS or /CE pins ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... ? It doesn't use the /M1 signal, can run on a ... improvisations needed.
An alternative (test) ROM, can be loaded by ...Newbie Hardware QuestionsI just recently aquired my first Spectrum, a +2, and I'm in the process of getting acquainted with it. Being a newbie I had some questions, which …
... converter to a breadboard to test different configurations for the cable ... be fair, the pricer AV-M1 doesn't sync on RGBHV ... same manufactures as the AV-M1, that I want to try ...
