Search found 6716 matches

by hoglet
Wed Jan 10, 2018 8:11 am
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

I'm fairly certain that's what I did - I even renamed the elk100 file on the PC to emphasise that it was your version. I take it there's no way to tell the difference in use (*help differences?) No, I think HELP would just show "Advanced DFS 1.00" You could always *SAVE it back out again ...
by hoglet
Wed Jan 10, 2018 7:41 am
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

I've rewritten the EPROM and switched to the Diamondback release of PiTube, and now everything seems to be working! =D> This includes your floppy drivers in ADFS 1.00. I can certainly read disc catalogues and load files. Interesting, and slightly surprising. Can you just confirm for ADFS you were u...
by hoglet
Tue Jan 09, 2018 2:35 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

Ah... no, I'm not sure. Furthermore, I reckon there's a good chance I have downloaded the E version, thinking that "E" stood for Electron. The configuration control for these roms is quite a challenge isn't it! Indeed it is, and it's mostly my fault for using single letter directory names...
by hoglet
Tue Jan 09, 2018 12:47 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

Wouldn't that make the Pi (Z80 mode) incompatible with a BBC though? It does, which is why it's a user settable parameter in cmdline.txt (not params.txt as I mistakenly said earlier). The problem is the Z80 client ROM actually contains some 6502 that's uploaded to the host and this accesses the Tub...
by hoglet
Tue Jan 09, 2018 11:17 am
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

Which MMFS version and ROM file are you using? I'll try and replicate. I've just built myself a similar ROM image: 0x0000 = Blank 0x4000 = U/ESWMMFS.rom from here 0x8000 = Blank 0xC000 = ELK100.rom here Here's the 64K ROM image: elk_eswmmfs_adfs.zip I've put the AP5 into Mode 2 (J1 missing, J2 pres...
by hoglet
Tue Jan 09, 2018 8:25 am
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

That's odd... I've now got j1 and j2 set up correctly for MMFS, but I still get a Card? Error with an MMC board connected to SK3. This board and card work fine with a BBC, but I'm not certain I've tested them with MMFS, only with the old DFS0.9 MMC system. Does this mean I need to do something diff...
by hoglet
Tue Jan 09, 2018 8:23 am
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

PiTubeDirect Cobra works too, with one exception: *fx 151 230 n seems to do nothing at all. Anyone know why? On the ELK the address of the tube is different. So you need to do *FX 147 230 n Also, do update to the DiamondBack release. It fixes a serious bug in the GPU code, and also adds an Elk mode...
by hoglet
Mon Jan 08, 2018 9:51 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1307

Re: My New Acorn Atom :)

waltermixxx wrote:Once I install the 32K memory and have memory from #0000 to #7FFF, will the 32K ram programs/games on the ATOMMC Program Compilation run?

They should work fine.

Dave
by hoglet
Mon Jan 08, 2018 12:40 pm
Forum: wanted
Topic: L6925/6/8 regulator
Replies: 3
Views: 85

Re: L6925/6/8 regulator

crj wrote:I'm going to place a Mouser order this week. If this is suitable I could tack it on and either stick it in an envelope to you or bring it to the meeting the weekend after next.

That would do perfectly. Thanks!

Dave
by hoglet
Mon Jan 08, 2018 12:18 pm
Forum: wanted
Topic: L6925/6/8 regulator
Replies: 3
Views: 85

L6925/6/8 regulator

Hi all, Does anyone happen to have a spare ST Microelectronics L6925, L6926 or L6928 regulator in an MSOP8 package? It's to try to repair a friend's GOP XC3S200: GOP_XC3S200.angle.jpg The regulator is meant to generate 1.2V, but is currently generating 2.9V :shock: It seems the output MOSFET is shor...
by hoglet
Mon Jan 08, 2018 7:47 am
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1307

Re: My New Acorn Atom :)

waltermixxx wrote:Would this be ok for my 32k ram upgrade, (this is from Briel's Apple 1 replica)

That should be perfect!

Dave
by hoglet
Sun Jan 07, 2018 10:30 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

VDFS does indeed do this and I think JGH may have worked out somewhere to store the flag to say if the masquerading is currently on or off. In MMFS there already is a bit of state (bit 6) in the private workspace byte (stored in &DF0-&DFF) to this effect. It's manipulated by *OPT 5,N, but a...
by hoglet
Sun Jan 07, 2018 8:53 pm
Forum: hardware
Topic: Fault finding index
Replies: 86
Views: 16951

Re: Fault finding index

Beeb Model B was working earlier today. It got left on all afternoon and when I came back in the evening and it seemed to have hung. Video was still active, but pressing BREAK had no effect. On power cycling I got a blank video display with a flashing cursor and a endless Beeeeeeeep. So I plugged th...
by hoglet
Sun Jan 07, 2018 8:38 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1307

Re: My New Acorn Atom :)

R-/W to /WE That's the one you need to be really careful about. For reliable writes, the WE signal of a RAM should be R-/W gated with Phi2, like the NWDS signal on the on the Atom Schematic is (i.e. NWDS should be low, only when R-/W is low and Phi2 is high). You could connect NWDS to the RAM /WE w...
by hoglet
Sun Jan 07, 2018 8:32 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

Regarding bank switching, I had assumed this would be something done manually by the user making the pokes described in the manual. It can't be done from within a sideways rom, presumably, as to do so would pull out the rug from under the feet of the currently executing rom. I think the idea is you...
by hoglet
Sun Jan 07, 2018 6:20 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

So if I went with ADFS my rom would look like this: Mode 3 0000-2FFF Spare and not really usable as there isn't anything else which uses a 4k overlay. 4000-6FFF ADFS 1.31 (needs patching with Elk hardware addresses) 8000-BFFF Spare - could use for any 16k ROM though C000-FFFF EMMFS @1900 Yes, that ...
by hoglet
Sun Jan 07, 2018 5:20 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

Someone really should draw a family tree for all ADFS versions! There was another branch that might be of interest: ADFS 1.31 (SCSI) and ADFS 1.32 (IDE patched my Michael). The image for ADFS 1.31 is here (amongst other places): http://archive.retro-kit.co.uk/BBC.nvg.org/rom/Acorn/fs/index.html And ...
by hoglet
Sun Jan 07, 2018 4:57 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 254
Views: 16095

Re: P.R.E.S. AP5 - Original and Re-Design

I can have a stab at answering these questions... 1) On page 12 of the manual the text at the bottom implies that the 62256 is the only supported SRAM type, but the table above states 16k RAM for Modes 2 & 3. Does this mean that these modes don't work with the 62256? That's possibly a typo in th...
by hoglet
Sun Jan 07, 2018 1:58 pm
Forum: hardware
Topic: Problem BBC Model B and Turbo MMC
Replies: 30
Views: 593

Re: Problem BBC Model B and Turbo MMC

Is there a heatsink on the video ULA? Check that it's not shorting on any of the resistors near by.
by hoglet
Sun Jan 07, 2018 12:05 pm
Forum: hardware
Topic: Problem BBC Model B and Turbo MMC
Replies: 30
Views: 593

Re: Problem BBC Model B and Turbo MMC

It seems to me this Beeb has developed a fault unrelated to Turbo MMC.

Probably best to strip it back to a minimal configuration, and follow the usual trouble-shooting process for a dead Beeb.
by hoglet
Sun Jan 07, 2018 11:59 am
Forum: archive requests
Topic: Master Emulation ROM Manual
Replies: 0
Views: 68

Master Emulation ROM Manual

Hi all, I hadn't come across the Dabs Press Master Emulation ROM before, and it's actually quite nifty. It makes your Model B look and feel very much like a Master 128. The ROMs are here, together with a few notes: http://mdfs.net/System/ROMs/Extensions/ There is a review in the March 1988 issue of ...
by hoglet
Sun Jan 07, 2018 11:27 am
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

Thinking about this more, that would give four new major variants so probably not a good idea after all... Would you like to give MMFS 1.40 a try: https://github.com/hoglet67/MMFS/releases This uses the same file handle range as DFS, so should now work with Master Emulation ROM. BTW, if you have bo...
by hoglet
Sun Jan 07, 2018 10:50 am
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

duikkie wrote:elite . is looking for filesystem 4

Thanks for that Duikkie. I've just tested this, and you are right.

If I change MMFS's file system number to a unique one, Elite no longer works.

There are probably many other tape-disk conversions that work in the same way.

Dave
by hoglet
Sat Jan 06, 2018 8:54 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

It would certainly be possible, but already many new users already manage to pick the wrong version.

It would be nice to have a definitive list of games that would break.
by hoglet
Sat Jan 06, 2018 8:40 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

I can think of two ways to fix this: ... b) Make MMFS use the same range of file handles as DFS (&11-&15) Doing that will break it as trying to use file handle &11 will cause DFS to be called. The correct solution is to ensure MMFS uses its own unique set of handles . You need five hand...
by hoglet
Sat Jan 06, 2018 8:22 pm
Forum: archive requests
Topic: Tubelink EXROM and UTILRAM
Replies: 20
Views: 357

Re: Tubelink EXROM and UTILRAM

jgharston wrote: I'll have a prod when I've finished me tea.

See explanation here:
http://www.stardot.org.uk/forums/viewto ... 84#p190684

It's all down to the file handle values.

Dave
by hoglet
Sat Jan 06, 2018 7:09 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

I am starting to wonder if MMFS should have it's own file system number and handle range: http://mdfs.net/Docs/Comp/BBC/Filing/FSNums http://mdfs.net/Docs/Comp/BBC/Filing/Handles This would allow it to co-exist with DFS, and in the Master (or a B with MER) files could be copied between the two. The ...
by hoglet
Sat Jan 06, 2018 6:46 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

Here's a trace of SRLOAD going wrong with a few comments (##): mer_trace.zip (It was captured using Myelin's FX2 adapter board hanging off the Tube and using my 6502 decoder .) MER intercepts OSCLI and tests for its commands first, which includes SRLOAD. When SRLOAD is executed, the MER uses the cur...
by hoglet
Sat Jan 06, 2018 5:52 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

mlouka wrote:Thanks, Dave. Am currently out of the house but will check a little when I get home and see if I can reproduce it in BeebEm.

I've managed to set up a system that reproduces the MER "Bad filing system name" issue, and I'm just looking in to it.

More later...
by hoglet
Sat Jan 06, 2018 2:44 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 729
Views: 37541

Re: MMFS Development and Support

Not sure if this is by design or accident, but the Master Emulator ROM and MMFS do not work as expected when MMFS is the active file system. The emulated MOS commands that use the DFS, such as SRLOAD, give ""Bad filing system name" with MMFS.' On the same beeb, TurboMMC and a "r...

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