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They were all LS types. The 7400 still is, the 74138s are currently HCT types. Thanks for the floating info; I did refer back to 74 series data sheets yesterday and didn't chance upon any that said what happened to voltage levels of unused gates. From what you say, following best practice may defini...

Here's a just-completed schematic for the programmer. Please let me know if something looks wrong. WE-Eprom-Programmer.pdf It should be a help in sorting it out and vital for working out the correct FCxx addresses to use. It was not possible to extract the 8255 without damage to the socket. Having r...

Thanks, but the design of the WE programmer is such that an internal 8255 is programmed by the ROM software to route the pins properly.

Alan

Thanks Dave. For completeness there is this v4 posted elsewhere in this forum: 8ccf49a17e39f2d9ce22c03afbf99147 "EPROM V4 Mark David (C) MDM Software 1984" WTFEPRM.ROM The ROMS on http://archive.retro-kit.co.uk/bbc.nvg.org/rom/Watford/util/index.html are covered in your zip (as v4 and v8). The ROM i...

Please pass on our regards to The 3rd Disgusting Fusiliers.
Coincidentally some of your kit is in the post to me. Good to see you on here.

Alan

I recently acquired a Watford Electronics Eprom programmer from eBay. It's not an Adder and doesn't say 'Mk II' on the case (though it does look like one). I assume it may be a 'Mk I'. It was in a bit of a state. Ultra-thin mains cable, blown chassis fuse, shorted bridge rectifier, the leads of some...

I'm assuming you mean the "TL866 II plus", in which case the command line tool 'minipro' appears to work under Fedora Linux after doing a "dnf install minipro" dmesg then shows: [ 6406.745914] usb 1-13: new full-speed USB device number 11 using xhci_hcd [ 6406.874020] usb 1-13: New USB device found,...

"Johnny" is showing some minor consequences of tape to disc conversion. First, the instruction screen disappears too quickly. Secondly the 'SAVE' command gives the option of "Tape or Memory" whereas disc is the permanent storage medium used. Thirdly, the save to disc bombs out owing to write protect...

International Megasports is the next misbehaving title. Under, at least, the following circumstances it crashes with an "at line" error. a) Press space bar to get through to "World Records" b) Press '1' to start c) Press 's' thrice to get past the player name screen (with name "AAA") d) Press 'N' at...

It's worth contacting Mark at RetroClinic, suppling the photo. He's provided me with a latch in the past.

The original RCOPY utility (v1.00) supplied with the DataCentre doesn't work on, at least, a Master 128 as it needs to operate from an initialised DFS whereas it always contrives to start up from a RAMFS environment. This caused "Bad string" errors at track 00. Having disassembled the program I've c...

Another common configuration is an RGB to SCART cable plus an Elephas SCART to HDMI converter plus an HDMI to DVI cable.

The uploaded file was a completely untouched original, so it must not have worked correctly out of the box?! :roll: I guess that must be true then. The handling of shadow screen RAM is incorrect. An obvious consequence is that the bottom of the screen gets corrupted as the title page displays fee, ...

leenew wrote: ↑

Sun Oct 13, 2019 10:10 am

I have uploaded the disc provided by BillC above...
Cheers!

Lee.

Ta. The loader file still needs a few adjustments to work properly on a Master but the newly uploaded file is a great improvement.

Alan

Thanks for that.

The latest interesting case I've come across is Giant Killer. Though the program works on a Model B, and of course that may fulfil all your criteria, the code was written with Master compatibility in mind. If it detects a Model B it chains a file called "GIANT" whereas if it detects a Master then a ...

sc126.JPG A rather nice out-of-the-blue gift. A Z180 kit with the CPU clocked at 18MHz. 512K ROM WBW, 512K ROM Monitor, 512K of RAM and a sprinkling of useful interface ports (serial, SD, USB etc). The homepage is here: https://www.tindie.com/products/tindiescx/sc126-z180-sbc-motherboard-kit/ All I...

Thanks Bill for sorting the Y and N For that misattribution let me suggest another title. Flint's Gold. I wouldn't mention it, given that the program works for tape. However, you did alter Vampire Island so it'd load/save to disc. I got Flint's Gold working with discs on the Master by shifting it u...

but the game has that W and T key thing when you quit. I have tried looking through the code to change it to Y and N but no luck. Can anyone else find it? Mick. The game looks to use: .loop lda $ec bpl loop cmp #$a1 beq xxx cmp #$a3 bne loop The A1 and A3 are where W & T are coming from. They presu...

I am mystified by R102 and C42 on the input of IC40, one input of the two input NAND gets the 16MHz clock and the other input is connected to the 16MHz clock and this little RC circuit. Anyone know why this is fitted? Is it a Furber finger of god mod? The intent of the circuit appears to be to impr...

I'm not sure what your policy is on bbcmicro.co.uk for handling saved games via PLAY. I've reported one such problem recently in a PM before this topic was set up. A new case in point is "Five Spheres of Goliath". If you type QUIT you have the option to save the game. This bombs-out because the file...

I am wondering if this is like a RIFA scenario, replace on sight? I'll have to give the VideoNULA another try! When I first pointed out this fix in a different thread I noted that the problem has affected all my Model Bs but, so far, none of my Master 128s. The oscillator has the same linear design...

I've just got round to looking at a mobo with the Tinsley EPROMs that's been put aside in a cupboard for a couple of years. Having done MD5SUMs of mine and the ones zipped-up earlier in this thread I can report that they match i.e. this is just a confirmation that the data are OK.

I am interested in what you are doing - Do you have notes on which programs are Master compatible? I would like to note this on bbcmicro. As you see most programs haven't been tested on a master. If you can supply me a list of which programs work and don't I would love to update the website with th...

Michael Brown wrote: ↑

Wed Sep 25, 2019 12:51 pm

PS As for Dracula, due to finding an issue, we now have a version that saves to disc.

Thanks. Good stuff. The original tape set PAGE to E00 so I left it at that. If shifting it up in memory has meant that disc saves now work then so much the better.

Alan

Hi. I was just wondering if it was possible that variables set up in my !BOOT menu interfer with the games in such a way that they work fine via the menu but not from a different !BOOT loader such as the one used on the website. Also, I can see that some changes to your copy were made REMing out the...

Just to be clear, is my copy failing under BBC B settings or Master 128? All my games have been copied to work on a BBC B and I have not tried them in 128 mode. I'm only reporting problems doing a PLAY on the web site and running the provided download within BeebEm 4.14 configured as a Model B. The...

I'm opening this thread by request of Lee. As I work my way through the list doing conversions I've been spotting a few problems I've PMd Lee with. This thread allows me to report them so they can be fixed openly. So, starting with 767 Advanced Flight Simulator. The program hangs at the external coc...

*ST is an abbreviation and, as such, needs to end with a full stop i.e. *ST.
Of course you can always use the full command *STATUS

My usual preference is, for uncracked programs, to make the operation of the program and loader as clear as possible, within reason. Hence, for personal use, I'd go with the version you've derived from what I posted (leaving K just displaying its title info). However, I know there are purists out th...