Search found 8751 matches

by hoglet
Fri Jan 24, 2020 8:03 am
Forum: hardware
Topic: MMFS Development and Support
Replies: 957
Views: 70813

Re: MMFS Development and Support

Initially, I made it call (&FFFC) to perform a soft reset. This worked for the ROMs in the MGC, though maybe I need to check whether there was some other initialisation in the menu that I wasn't aware of. I think this doesn't work because MMFS needs a Ctrl-BREAK to force re-initialization. I also t...
by hoglet
Thu Jan 23, 2020 9:21 pm
Forum: hardware
Topic: Z80 Protocol Decoder
Replies: 203
Views: 7719

Re: Z80 Protocol Decoder

You seen this?; https://sigrok.org/wiki/Protocol_decoder:Z80 Yes, and indeed this was what made me realise that this kind of instruction stream decoding might be possible for the 6502. The 6502 Decoder started life as a sigrok protocol decoder as well (written in Python), but it turned out to be wa...
by hoglet
Wed Jan 22, 2020 6:36 pm
Forum: projects
Topic: Good test games / programs for an emulator
Replies: 20
Views: 455

Re: Good test games / programs for an emulator

Good point Ed, I might add a dump to hoglet binary option and check where decodes fail - I'm guessing the Hoglet decoder will barf on mis-timed instructions? Yes, indeed it will, especially if you force it to ignore the sync input. I've used the decoders to verify the cycle accuracy of the T65 and ...
by hoglet
Wed Jan 22, 2020 6:28 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 24 to 26 January 2020: NOW FULL
Replies: 149
Views: 5244

Re: ABUG SOUTH 24 to 26 January 2020: NOW FULL

Thanks Stewart and Simon. Yes please!

Dave
by hoglet
Wed Jan 22, 2020 6:06 pm
Forum: hardware
Topic: Z80 Protocol Decoder
Replies: 203
Views: 7719

Re: Z80 Protocol Decoder

The system I need to debug is running at 3.58MHz, a Spectravideo SV-328 You'll likely need to capture at 16MHz then. BTW, is there a description of the command-line options somewhere? Here is a bit of built in help: ./decodez80 --help Usage: decodez80 [OPTION...] [FILENAME] The following options co...
by hoglet
Wed Jan 22, 2020 4:20 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 957
Views: 70813

Re: MMFS Development and Support

I added the zeros back again because I compress the image when I add it to the boot ROM. :) OK, I'll revert this change to the build system. Maybe I need to do something else after copying the ROM image into sideways RAM. I should perhaps step through the code in the debugger to see what's tripping...
by hoglet
Wed Jan 22, 2020 4:12 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 24 to 26 January 2020: NOW FULL
Replies: 149
Views: 5244

Re: ABUG SOUTH 24 to 26 January 2020: NOW FULL

I have a small request for attendees.... BigEd and I were intending to do some testing of the next release of PiTubeDirect, which is called Fer-De-Lance (a Snake :shock: ) If anyone has one of the following Pi Models we could borrow for a couple of hours, that would be much appreciated. Pi 1 Model A...
by hoglet
Wed Jan 22, 2020 3:41 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 957
Views: 70813

Re: MMFS Development and Support

I also see the "Bad Sum" error after copying the ROM data into sideways RAM. However, after Ctrl-BREAK it works as expected, so perhaps the initialisation code is getting run and the checksum is being regenerated. I need to look at what tools like SRLOAD, ROMLOAD (PRES) and RLOAD (Slogger) do, but ...
by hoglet
Wed Jan 22, 2020 3:02 pm
Forum: hardware
Topic: Z80 Protocol Decoder
Replies: 203
Views: 7719

Re: Z80 Protocol Decoder

I'm using the Kingst LA1010. It can capture 16 channels @ 16MHz OK, so you'll be using asynchronous mode, in which case you need to connect the CLK signal to Bit 15. What speed is your Z80 running at? Something I've noticed is that there seems to be xtalk between the different channels, especially ...
by hoglet
Wed Jan 22, 2020 1:23 pm
Forum: hardware
Topic: Z80 Protocol Decoder
Replies: 203
Views: 7719

Re: Z80 Protocol Decoder

These are the signals that must be captured, correct?: - Data 1 - 8 - /M1 - /MREQ - /IORQ - /RD - /WR - /RST For the file to be properly decoded, must these signals be capture in a specific order? I.e. Probe-1 on the logic analyzer must be a specific signal, etc? And must they be named in a specifi...
by hoglet
Wed Jan 22, 2020 1:06 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67464

Re: ICE T65/Z80/6809

Is this 'User Error' / RTFM or...? Probably neither of those.... There is handshaking in the hardware to ensure commands from the AVR core to the Bus Monitor logic are not lost, and this handshaking involves the target system clock. If this clock is too slow, a timeout will occur in the AVR softwar...
by hoglet
Tue Jan 21, 2020 9:25 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67464

Re: ICE T65/Z80/6809

I was planning on seting up a NOP test* to take the Z80 ICE for a spin. Any recommendations for testing - making sure I programmed the FPGA with the correct version and testing the adapter board ? *) NOP test is where you provide a clock -usually NE555 based- and tie all data lines to GND (using an...
by hoglet
Mon Jan 20, 2020 8:30 pm
Forum: acorn atom and system
Topic: Atom 2k18 ?
Replies: 285
Views: 14990

Re: Atom 2k18 ?

At one time I think Trenz had some without the headers. So this may be possible if they are still producing these (rather than just selling existing stock). My understanding was that they are now just running down existing stock. But people should ask them explicitely, and I hope I'm wrong. You nev...
by hoglet
Mon Jan 20, 2020 2:18 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 822
Views: 48670

Re: RGB to HDMI using a Pi Zero and a small CPLD

aotta wrote:
Mon Jan 20, 2020 2:15 pm
excellent!
but when the new ttl version will be published? on github rgbtohdmi i found nothing about...
All the work in the last 12 months has been happening in the dev branch:
https://github.com/hoglet67/RGBtoHDMI/tree/dev
by hoglet
Mon Jan 20, 2020 1:44 pm
Forum: acorn atom and system
Topic: Atom 2k18 ?
Replies: 285
Views: 14990

Re: Atom 2k18 ?

The other problem is the GODIL. Can I use the original video IC instead? The Atom 2K15 system is not compatible with the original 6847, mostly because there is no provision for external video RAM. I've just looked at my Atom 2K15 system, and it might *just* be possible to use the GODIL that is stil...
by hoglet
Sat Jan 18, 2020 12:14 pm
Forum: hardware
Topic: New Raspberry Pi to 1MHz bus interface
Replies: 61
Views: 1710

Re: New Raspberry Pi to 1MHz bus interface

=Ah. So they are open collector. I did suspect that, but I couldn't find any information to confirm it. I obviously didn't look hard enough. The nmi and irq lines already have 3k3 pull up on the beeb side, so I'll just wire the signals straight through to the RPi and bypass the level shifter and di...
by hoglet
Sat Jan 18, 2020 7:50 am
Forum: acorn atom and system
Topic: Atom Software Archive
Replies: 1219
Views: 156756

Re: Atom Software Archive

iamaran wrote:
Fri Jan 17, 2020 11:46 pm
Scans of Christmas Adventure from Acorn User, January and February 1984.
Thanks for this.

It was mentioned earlier in this thread:
viewtopic.php?p=68664#p68664

But we seem to have missed actually typing it in!

Dave
by hoglet
Thu Jan 16, 2020 9:16 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67464

Re: ICE T65/Z80/6809

I've done a quick pass over the programming page on the Wiki.

It now includes the information for the EEPIZZA board and has been renamed to reflect this:
https://github.com/hoglet67/AtomBusMon/ ... -in-iMPACT
by hoglet
Thu Jan 16, 2020 8:35 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67464

Re: ICE T65/Z80/6809

Right, that should be 14.7 indeed and I run on Windows (tried Linux too but that crashed) - and yes it is the EEPizza board. I have that programmer as well - so that means the USB on the EEPizza board is for power only? Any hints on how to use the software? Normally the biggest hurdle is installing...
by hoglet
Tue Jan 14, 2020 10:50 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 172
Views: 8062

Re: BeebSCSI 7_7

I think what's caused confusion here is that that FatFS effectively changed their configuration API: R0.13 (May 21, 2017) Changed heading character of configuration keywords "_" to "FF_". (I'm using the term API rather loosely here) Simon's "upstream" BeebSCSI uses an R0.12b of FatFS. Dominic's "dow...
by hoglet
Tue Jan 14, 2020 7:48 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 172
Views: 8062

Re: BeebSCSI 7_7

I think an old version of FATFS is being used in BeebSCSI; the symbol seems to be called _USE_FASTSEEK not FF_USE_FASTSEEK https://github.com/simoninns/BeebSCSI/blob/master/BeebSCSI_AVR/BeebSCSI_AVR/fatfs/ffconf.h#L46 See also this post: https://stardot.org.uk/forums/viewtopic.php?p=229567#p229567 D...
by hoglet
Mon Jan 13, 2020 10:40 pm
Forum: acorn atom and system
Topic: FPGAtom 64 colour
Replies: 47
Views: 1229

Re: FPGAtom 64 colour

Glad it's all working for you - I didn't actually do much testing. Can you and Kees work out a way to start Chuckie Egg, and maybe other games, in another colour setting? That can be achieved in the sources (so Kees has to modify them a little bit) or by adding a pre-loader that sets the correct col...
by hoglet
Mon Jan 13, 2020 3:37 pm
Forum: acorn atom and system
Topic: FPGAtom 64 colour
Replies: 47
Views: 1229

Re: FPGAtom 64 colour

A little bit of history... The current version of Atom FPGA was started by Alan Daly in 2009. It used an Olimex Mod VGA board: https://www.olimex.com/Products/Modules/Video/MOD-VGA-32MB/open-source-hardware The Olimex board was designed as an open source implementation of the GameDuino FPGA-based gr...
by hoglet
Sun Jan 12, 2020 7:45 pm
Forum: acorn atom and system
Topic: FPGAtom 64 colour
Replies: 47
Views: 1229

Re: FPGAtom 64 colour

@Hoglet: did you already have a look to change the palette registers addresses ? Sorry Roland, I overlooked this request. Anyway, it's done now. I chose #BD00 -#BD0F, as this is at the start of the 256b "GODIL" address space. I've also just merged all the palette work back to the master branch. I a...
by hoglet
Sun Jan 12, 2020 4:30 pm
Forum: software: other
Topic: *DBOOT (MMFS) from BASIC
Replies: 4
Views: 147

Re: *DBOOT (MMFS) from BASIC

Try adding a line 15 to your program and you'll see what's going on: 15 PRINT A$ The problem case here is when the boot option is 3 (EXEC), because indeed EXEC does just insert things into the keyboard buffer. I don't think it should matter whether then disk number or disk name is used. Other boot o...
by hoglet
Sat Jan 11, 2020 5:10 pm
Forum: hardware
Topic: Electron with odd video issue
Replies: 40
Views: 725

Re: Electron with odd video issue

Can you post a photo of the "collapse effect"?
by hoglet
Thu Jan 09, 2020 2:16 pm
Forum: hardware
Topic: Emulating (or obtaining!) an ARM Evaluation System
Replies: 10
Views: 440

Re: Emulating (or obtaining!) an ARM Evaluation System

It won't be cycle accurate compared to the ARM 1, but the Matchbox Co Pro contains an ARM 2 Co Processor. It uses the Amber ARM2a core: https://en.wikipedia.org/wiki/Amber_(processor_core) https://opencores.org/projects/amber https://opencores.org/websvn/filedetails?repname=amber&path=%2Famber%2Ftru...
by hoglet
Tue Jan 07, 2020 8:47 pm
Forum: hardware
Topic: How can I save my Elite game on a Turbo MMC card?
Replies: 16
Views: 301

Re: How can I save my Elite game on a Turbo MMC card?

Can you post a photo of the inside of your Master?

It's possible that some of the sideways RAM slots have been disabled (by LK18 and LK19).

Make sure these are both in the WEST position.

See the description of LK18/19 here:
http://8bs.com/in128.htm
by hoglet
Tue Jan 07, 2020 8:16 pm
Forum: hardware
Topic: How can I save my Elite game on a Turbo MMC card?
Replies: 16
Views: 301

Re: How can I save my Elite game on a Turbo MMC card?

There is a disc image in the release package, called:
T/mmfs.ssd

This contains the MAMMFS file you need.
by hoglet
Tue Jan 07, 2020 8:03 pm
Forum: hardware
Topic: How can I save my Elite game on a Turbo MMC card?
Replies: 16
Views: 301

Re: How can I save my Elite game on a Turbo MMC card?

In which case can anyone help me obtain a Master 128 specific TurboSPI ROM that has page at &E00 please? Thanks. You could try MMFS. The latest release package is here: https://github.com/hoglet67/MMFS/releases For the Master with a Turbo MMC connected to the normal user port, use the following ver...