Search found 124 matches

by roganjosh
Sat Oct 12, 2019 10:59 pm
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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 ...
by roganjosh
Fri Oct 11, 2019 3:46 pm
Forum: general
Topic: Today I received.....
Replies: 5903
Views: 557083

Re: Today I received.....

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...
by roganjosh
Sat Oct 05, 2019 3:58 pm
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Sat Oct 05, 2019 1:17 pm
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Thu Oct 03, 2019 4:52 pm
Forum: 8-bit acorn hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 46
Views: 2620

Re: Fixed: Mode 7 intermittent lines

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...
by roganjosh
Wed Oct 02, 2019 10:10 am
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Wed Oct 02, 2019 7:15 am
Forum: 8-bit acorn hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 46
Views: 2620

Re: Fixed: Mode 7 intermittent lines

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...
by roganjosh
Tue Oct 01, 2019 10:26 pm
Forum: 8-bit acorn hardware
Topic: My Master is back from the dead
Replies: 19
Views: 3142

Re: My Master is back from the dead

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.
by roganjosh
Sat Sep 28, 2019 7:40 am
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Wed Sep 25, 2019 2:07 pm
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

Michael Brown wrote:
Wed Sep 25, 2019 1:51 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
by roganjosh
Wed Sep 25, 2019 10:06 am
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Tue Sep 24, 2019 7:29 pm
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Re: Games with problems

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...
by roganjosh
Mon Sep 23, 2019 10:18 am
Forum: the complete BBC games archive
Topic: Games with problems
Replies: 93
Views: 7876

Games with problems

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...
by roganjosh
Sun Sep 22, 2019 3:43 pm
Forum: general
Topic: Issue booting BBC Micro for first time
Replies: 1
Views: 353

Re: Issue booting BBC Micro for first time

*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
by roganjosh
Sun Sep 22, 2019 12:21 pm
Forum: 8-bit acorn software: classic games
Topic: Anyone fancy cracking Dracula Island?
Replies: 8
Views: 1334

Re: Anyone fancy cracking Dracula Island?

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...
by roganjosh
Sat Sep 21, 2019 10:35 pm
Forum: 8-bit acorn software: classic games
Topic: Anyone fancy cracking Dracula Island?
Replies: 8
Views: 1334

Re: Anyone fancy cracking Dracula Island?

Here's another one. The BASIC program has been de-mangled and file 'K' adjusted to move it into position.
DraculaIsland.ssd
(34 KiB) Downloaded 24 times
by roganjosh
Tue Sep 10, 2019 7:50 pm
Forum: other vintage hardware, software and languages
Topic: Help needed with VIC20
Replies: 4
Views: 700

Re: Help needed with VIC20

Boydie wrote:
Mon Aug 12, 2019 11:26 am

Any ideas where to test, or recommendations for forums which will offer stardot-level troubleshooting?
The forum->Help&Support section at https://www.lemon64.com is useful for troubleshooting.
by roganjosh
Fri Sep 06, 2019 10:41 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

The problem with Battletank is that the main part "TANK" (load addr 900, length 2e00) references OS ROM addresses ($c620 onwards) notably but not limited to: 2e9c lda $c620,y 2ea1 lda $c621,y That OS block looks to be an area where there is a good mix of positive and negative bytes. I'm guessing tha...
by roganjosh
Fri Sep 06, 2019 3:32 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

Thanks. I'll add it to my list of mysterious things.
by roganjosh
Fri Sep 06, 2019 12:10 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

Yes indeed. I've met all of those in abundance plus, of course, the user defined graphics stuff. Then there are the ones making calls into the BASIC2 ROM (e.g. 3D Snooker). There is one site which documents useful calls in BASIC 4 but none for BASIC 7 (it just duplicates the BASIC 4 info, intended a...
by roganjosh
Wed Sep 04, 2019 6:46 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

=D> Yaay! thank you. Would you mind keeping notes as to which games work 'as is' and which ones you have had to alter? I know some BASIC listings do a CALL &D9CD on exit instead of the CALL!-4 which would work on both machines, so don't forget to see if they 'BREAK' OK :D Lee. I'll be happy to star...
by roganjosh
Wed Sep 04, 2019 3:52 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

That's just what I did earlier, thanks, as well as trapping screen clears. You have a good memory as there was also an IRQV restore to fix. Some of those are perverse: they sometimes go to the trouble of saving the old vector as an exit point but don't use those values to do any restoration, preferr...
by roganjosh
Wed Sep 04, 2019 7:23 am
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Re: Row multiplication table substitution

Thanks for the confirmation. Coincidentally it was Contraption that I was looking at. Unfortunately the Master zero page locations don't seem to be comprehensively documented anywhere that I can see. The MRF(1) only lists D0-FF as MOS workspace (as does the ARM). The NAUG gives the usual Model B des...
by roganjosh
Tue Sep 03, 2019 6:27 pm
Forum: programming
Topic: Row multiplication table substitution
Replies: 13
Views: 937

Row multiplication table substitution

As is well known, the vector at e0,1 on a BBC B points to the row multiplication table in the ROM. Porting software from B to Master often involves implementing alternative different ways to read the table. However I've hit some Model B code that writes to e0,1 so invoking a different table and ther...
by roganjosh
Thu Aug 29, 2019 2:37 pm
Forum: 8-bit acorn software: other
Topic: Odd GCOLs & PLOTs
Replies: 7
Views: 700

Re: Odd GCOLs & PLOTs

Thanks. Much appreciated.
by roganjosh
Thu Aug 29, 2019 1:20 pm
Forum: 8-bit acorn software: other
Topic: Odd GCOLs & PLOTs
Replies: 7
Views: 700

Odd GCOLs & PLOTs

In doing some software porting I've come across the following statements: GCOL 44,1 GCOL 43,3 PLOT 77,x,y The user guide states that the first parameter to GCOL should be in the range 0-4. It also states that PLOT values 72-79 are reserved. I can't see any blatantly obvious logical masks in BASIC2 -...
by roganjosh
Sun Aug 25, 2019 6:42 pm
Forum: 8-bit acorn software: other
Topic: Tube host code ROMs
Replies: 3
Views: 461

Re: Tube host code ROMs

Brilliant. Thanks to you both.

Alan
by roganjosh
Sun Aug 25, 2019 2:03 pm
Forum: 8-bit acorn software: other
Topic: Tube host code ROMs
Replies: 3
Views: 461

Tube host code ROMs

One of my Model Bs came with a WE DDB2 DDFS board and the WE 1.53 ROM. A quick browse of the ROM for addresses looking like tube host calls didn't look promising. Unless someone has a version of that DDFS code hacked to contain the tube stuff I'm left wondering what the most exciting ROM might be wh...
by roganjosh
Sun Aug 25, 2019 6:14 am
Forum: 8-bit acorn hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 46
Views: 2620

Re: Fixed: Mode 7 intermittent lines

Good stuff. Well done.
Also, as you're very probably aware, a little wobbling of the display on changing mode is normal behaviour for many HDMI converters.
I go for the low profile crystals as they are unlikely to be NOS ones.

Alan
by roganjosh
Thu Aug 22, 2019 10:46 am
Forum: 8-bit acorn hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 46
Views: 2620

Re: Mode 7 intermittent lines

Thanks again folks, I will go down the route of: Trying the Beeb on a SCART TV to assess the quality of the direct output vs captured Source some components to swap out one at a time: IC43 SN74ALS04 Report back I also tried the OSSC I have that I usually run my Amiga and RiscPC from and it doesn't ...

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