Search found 1294 matches

by billcarr2005
Fri Apr 19, 2019 8:56 pm
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

Anyway the download on my website includes the best of all worlds. There is the de-protected SSD, the re-protected SSD and a copy of the ROM. As you say, being digital copies, even if a physical disc is trashed it will always be possible to rebuild it - we have the technology. :lol: It also should ...
by billcarr2005
Fri Apr 19, 2019 4:44 pm
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

They'd only appear to have worked until the disk was booted and INSTALL realises there's no ROM there! What I meant was, that by removing the size check / "correcting" the disk size, you've allowed the end user to overwrite the data which is required to load the ROM. Any program which just does a bl...
by billcarr2005
Fri Apr 19, 2019 12:17 pm
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

Regarding your write up of the protection on the disk, it's worth noting that the disk is only reporting 32 tracks so that the "hidden" data can in no way be overwritten accidentally, since the disk has *all* of it's tracks "full" with files that the DFS can see. So not protection as such, which is ...
by billcarr2005
Fri Apr 19, 2019 10:29 am
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

Yes, that's right. There is something fishy about that ROM image, though. The ROM loads and is initialised and works OK. It even survives a Ctrl-Break. It will not survive a *fx200,3 + Ctrl-Break, though. I wrote a routine to extract the ROM code from the disc and assemble it into a complete image ...
by billcarr2005
Thu Apr 18, 2019 2:28 pm
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

So the ROM is loaded in 2048 byte chunks from Track 27, Sector 1 through 8 down to Track 20 Sector 1 through 8, firstly into &3800 then moved to &8000 in the file INSTALL
by billcarr2005
Thu Apr 18, 2019 9:03 am
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

flaxcottage wrote:
Thu Apr 18, 2019 8:54 am
... I cannot image the fully protected disc because of the protection method used ...
You could with an UPURS cable! :wink:
by billcarr2005
Thu Apr 18, 2019 3:44 am
Forum: software: other
Topic: Logotron PrintBox ROM anyone?
Replies: 15
Views: 183

Re: Logotron PrintBox ROM anyone?

From the retrokit mirror of TBL
http://archive.retro-kit.co.uk/bbc.nvg. ... s/printer/ PrintBox-1.22.rom

Presume it's *PB to kick things off

I'd certainly be interested in any protected disk too, if you can image it...
by billcarr2005
Tue Apr 16, 2019 6:35 am
Forum: software: classic games
Topic: Electron Kastle
Replies: 6
Views: 259

Re: Electron Kastle

How are you supposed to "solve" the spell when it's cast on a screen with the dragon? There's a circle with skulls numbered 1 to 5. I assume they need to be put into a certain pattern? I've given myself plenty of time to solve it, although maybe that's what 0xC0DE was referring to about not being ab...
by billcarr2005
Mon Apr 15, 2019 1:24 am
Forum: software: classic games
Topic: Electron Kastle
Replies: 6
Views: 259

Re: Electron Kastle

I think this suffers from the potential same problem, although energy can be lost repeatedly with no death as a result.
If the dragon was able to be slain / slayed / slew, the path goes no further anyway...
by billcarr2005
Thu Apr 04, 2019 7:23 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 52
Views: 1187

Re: Who's ready for... guess that game! ;D

Yes we have no bananas!

from Banana man?

http://bbcmicro.co.uk/game.php?id=1
by billcarr2005
Fri Mar 29, 2019 3:02 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 52
Views: 1187

Re: Who's ready for... guess that game! (from a fragment of annotated disassembly) ;D

I'll name that tune in four... as Chuckie Egg
by billcarr2005
Fri Mar 22, 2019 4:48 pm
Forum: archive submissions
Topic: Kissing The Pink - Other Side Of Heaven
Replies: 5
Views: 237

Re: Kissing The Pink - Other Side Of Heaven

Both UEFs have identical CRC32 :wink:
by billcarr2005
Wed Mar 06, 2019 3:30 pm
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Mallworld Tesla
LEVEL3t.png
LEVEL2t.png
LEVEL1t.png
by billcarr2005
Wed Mar 06, 2019 12:59 pm
Forum: software: new games
Topic: New game for the BBC Master : Planet Nubium
Replies: 35
Views: 4009

Re: New game for the BBC Master : Planet Nubium

=D> I've been enjoying each version of this game, improving all the time!
by billcarr2005
Tue Mar 05, 2019 10:00 pm
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Iceworld Shail
LEVEL2t.png
LEVEL1t.png
by billcarr2005
Sun Mar 03, 2019 11:00 am
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Dustworld Delan
LEVEL2t.png
LEVEL1t.png
LEVEL3t.png
by billcarr2005
Sun Mar 03, 2019 10:53 am
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Baseworld Cygni
LEVEL1t.png
LEVEL3t.png
LEVEL2t.png
by billcarr2005
Wed Feb 27, 2019 3:19 pm
Forum: wanted
Topic: Level 9 games
Replies: 21
Views: 1452

Re: Level 9 games

Is Time and Magik OMG RARE?

I might have a spare disk...
by billcarr2005
Mon Feb 25, 2019 10:19 pm
Forum: adventures
Topic: Rainbird titles on the BBC
Replies: 6
Views: 609

Re: Rainbird titles on the BBC

The Centre for Computing History has a "test disk" for the BBC/Rainbird Knight Orc listed in their catalogue alongside the Atari version... http://www.computinghistory.org.uk/det/41152/Knight-Orc/ Woah, we could do with that archiving for sure! Wouldn't have thought it would've been protected eithe...
by billcarr2005
Sun Feb 24, 2019 1:31 pm
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Level data manipulation is started at &2D9E in the game code
by billcarr2005
Sun Feb 24, 2019 12:41 pm
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

1C 00 06 08 04 40 A8 49 08 10 18 20 <-- value 05 0F 0A 0E 08 0C 13 1B <-- offset D9 E5 7A 7D B9 5E 5F AE D7 97 EB F9 C1 F7 07 9F 1F B3 7C 3D 07 BF 35 E6 5F D6 87 F3 19 This is the code for the start of the level 1C 00 is the length of the data 001C 06 gets stored in 0031 08 is the amount of data wh...
by billcarr2005
Sun Feb 24, 2019 11:32 am
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Nice. :) Are you using my scripts or have you created a utility of your own? I initially starting hacking at the BBC disk version code, then clunkily exported the graphics to single BMP tiles and rewrote the 6502 loops in BBC BASIC for Windows, although now I've realised I can't easily (unless I'm ...
by billcarr2005
Sun Feb 24, 2019 10:14 am
Forum: software: classic games
Topic: Firetrack maps
Replies: 26
Views: 6467

Re: Firetrack maps

Added full sets of the first two worlds below
by billcarr2005
Sun Feb 10, 2019 9:09 pm
Forum: bbcmicro.co.uk
Topic: Alternative REVS release
Replies: 2
Views: 196

Re: Alternative REVS release

I think the thread you linked to was this one...
Presume you meant the following viewtopic.php?f=1&t=4471#p39918 which contains the Superior Software re-release :)
by billcarr2005
Fri Feb 08, 2019 2:08 pm
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

I've discovered why BeebEM 4.14 is failing. 6131 LDA FE61 ; PHA results in &FF on stack (&126), should be &69 (as on B-em v2.2) 6135 LDA FE6A ; PHA results in &FF on stack (&125), should be &D4 (as on B-em v2.2) By setting a breakpoint at &6161, B 6161 C 1A5 D4 69 the code will then decrypt fine, ca...
by billcarr2005
Fri Feb 08, 2019 11:31 am
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

On BeebEM 4.14... If Lunar Jetman is falling at the final hurdle, the final decryption is to push FE61 and FE6A to the stack, pull them from the stack a little while later and store in FE68 and FE69 and then EOR the code, from &1800 until &6100 with FE68 and FE69 Nightshade is doing similar, but pus...
by billcarr2005
Fri Feb 08, 2019 11:04 am
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

Nightshade UEF and CSW are here https://stardot.org.uk/forums/viewtopic.php?t=5023#p86170 The code in Nightshade at &710A JMP &719C occurs if &240 isn't &22 &719C decrypts &900 (format code posted on previous page) and executes it. Lunar Jetman has identical code at &6100, checking whether &240 isn'...
by billcarr2005
Fri Feb 08, 2019 12:04 am
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

I think it was just that the screenshot was taken at a bad time. The program runs fine, graphics are as expected. I've just stepped through the Nightshade decoders (which runs correctly in BeebEM). It's mostly identical to Lunar Jetman, save for being loaded into different locations. Clearly the fin...
by billcarr2005
Thu Feb 07, 2019 11:11 pm
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

Kevin Edwards wrote:
Thu Feb 07, 2019 10:59 pm
So, are all the Beeb emulators unable to load and run Lunar Jetman using the original tape images? Is there a bit more emulation work required for this game?

Thanks,
Kevin.
B-em v2.2 can successfully load the game from the CSW :)
JETMAN.png
by billcarr2005
Thu Feb 07, 2019 9:18 pm
Forum: software: classic games
Topic: Lunar Jetman protection
Replies: 39
Views: 1376

Re: Lunar Jetman protection

I'm not great at this, but I modified b-em's JMP instruction to scan memory for Kevin's signature *FX 200, and came up with three sightings. Do these decoded blocks look right? &6100 BLOCK 6100: AD 40 02 LDA 0240 6103: C9 47 CMP #47 6105: F0 06 BEQ 610D 6107: 8C 04 61 STY 6104 ; obfuscate? 610A: 4C...