Discuss Scratch

#41April 27, 2021 16:34:37
colinmacc
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

bradylay24 wrote:

ok nevermind…………..i fergot to look up and there was the answer lol, but when i load a real game from online like “elite” it says not found

Elite is already in the list of included disks…

Sample Projects

#42April 27, 2021 17:10:26
RokCoder
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

samq64 wrote:

I think I found a bug. A “Browse…” button and a “No file selected.” label appeared under the green flag on the website.
That text is out of the Scratch display area so I would strongly suspect it's an issue in Scratch or TurboWarp. Thanks for reporting it though.

Scratch dabbling for fun…
#43April 27, 2021 17:14:12
RokCoder
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

bradylay24 wrote:

ok nevermind…………..i fergot to look up and there was the answer lol, but when i load a real game from online like “elite” it says not found
As ColinMacc mentioned, Elite is already included. Any downloaded disc images should work though. ‘Disc loaded’ means it has been verified and loaded. You just need to shift+break after that. You can also check what's on the disk with *CAT

Scratch dabbling for fun…
#44April 27, 2021 18:21:59
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

I made some new programs for my disk. You can now just shift click the break button to load a menu which is used to load the programs. Other than that I added some multiplication flashcards and a timer.
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Last edited by xXName77Xx (April 28, 2021 00:33:10)

#45April 28, 2021 19:03:15
RokCoder
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

xXName77Xx wrote:

I made some new programs for my disk. You can now just shift click the break button to load a menu which is used to load the programs. Other than that I added some multiplication flashcards and a timer.
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You're really getting the hang of this! Nice to see you've got auto-booting sorted. Why do you have a file called “0.2” sitting there? *delete to get rid of it…

Last edited by RokCoder (April 28, 2021 19:04:31)


Scratch dabbling for fun…
#46April 28, 2021 19:05:28
RokCoder
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

njdavison wrote:

Classic Elite Sound
BBC BASIC listing taken from http://wiki.alioth.net/index.php/Classic_Elite_sounds
The parameters for the Sounds (and envelopes) were extracted from disc A4080602 on Ian Bell's web site and is specific to the BBC tape cassette version of Classic Elite (The hyperspace sound in the Disk version may be slightly different).

Load the user disk code below
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I'm loving these disk images!

Last edited by RokCoder (April 28, 2021 19:06:27)


Scratch dabbling for fun…
#47April 28, 2021 19:31:12
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

RokCoder wrote:

xXName77Xx wrote:

I made some new programs for my disk. You can now just shift click the break button to load a menu which is used to load the programs. Other than that I added some multiplication flashcards and a timer.
You're really getting the hang of this! Nice to see you've got auto-booting sorted. Why do you have a file called “0.2” sitting there? *delete to get rid of it…
Thanks! I have deleted that old file, it was a work in progress version of “Enemy Siege”. I also added a simple dice program just now.
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Last edited by xXName77Xx (April 28, 2021 19:42:26)

#48April 28, 2021 19:31:47
samq64
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

xXName77Xx wrote:

I made some new programs for my disk. You can now just shift click the break button to load a menu which is used to load the programs. Other than that I added some multiplication flashcards and a timer.
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cool!
#49April 28, 2021 19:43:06
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

samq64 wrote:

xXName77Xx wrote:

I made some new programs for my disk. You can now just shift click the break button to load a menu which is used to load the programs. Other than that I added some multiplication flashcards and a timer.
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cool!
Thanks! I put quite a bit of time into this emulator lol.

Last edited by xXName77Xx (April 28, 2021 20:02:30)

#50April 28, 2021 19:59:04
RokCoder
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

Example of how you can code 6502 assembly language straight from BBC BASIC
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LOAD "6502"
LIST
RUN
CALL &900

The BASIC program uses assembly language to create a small machine code program at $900 in memory. Every time you CALL &900 you execute the machine code.

Scratch dabbling for fun…
#51April 28, 2021 20:04:06
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

I made some small memory saving changes and added an Easter egg somewhere… and added stopwatch program.
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Last edited by xXName77Xx (April 28, 2021 20:43:29)

#52April 28, 2021 23:56:11
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

I may or may not have added tic tac toe.
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Last edited by xXName77Xx (April 29, 2021 00:10:12)

#53April 29, 2021 00:01:31
colinmacc
Scratcher
1000+ posts

The Beeb - a full BBC Microcomputer emulator

xXName77Xx wrote:

I may or may not have added tic tac toe.
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This is really great!

EDIT: I really wish I could remember all the stuff I used to know, but it's been 30 years since I last did any BASIC and it's all gone

Last edited by colinmacc (April 29, 2021 00:04:07)

Sample Projects

#54April 29, 2021 00:11:24
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

colinmacc wrote:

xXName77Xx wrote:

I may or may not have added tic tac toe.
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This is really great!

EDIT: I really wish I could remember all the stuff I used to know, but it's been 30 years since I last did any BASIC and it's all gone
Thanks, it took too much time to make lol.
#55April 29, 2021 02:30:22
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

My disk has a total of seven different programs on it, two of which being simple games, so far anyways. Also, you can run everything from the menu which can be accessed by shift-clicking break or typing ‘chain “menu”’.
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Last edited by xXName77Xx (April 29, 2021 23:52:30)

#56April 29, 2021 23:50:14
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

I added some bug fixes and slight optimizations to the programs on my disk. I also added some new features and Easter Eggs. Also, to people who don't know, you can access all programs on this disk after loading the code by shift clicking break or by typing chain “menu”.
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when I receive [an idea of what to do v]
if <idea=code in BBC BASIC> then
repeat(infinity)
replace item (random v) of [code v] with [better code]
end
think [finally]
end

Last edited by xXName77Xx (April 30, 2021 02:40:02)

#57April 30, 2021 14:44:19
CyrusTheNiceGuy
Scratcher
100+ posts

The Beeb - a full BBC Microcomputer emulator

Here's a good tip that learned from some of the videos I've seen on retro computers.

The text in bold is what should be included for the tip.

Want to test BASIC? Input this simple code!

10 PRINT “ROKCODER IS A LITERAL GOD AT PROGRAMMING”
20 GOTO 10
RUN

Don't forget to press the “break” key when you're done; this script will run forever!

I'm not sure if this is worth any sort of credit, but if it is, then credit would be appreciated.


Siggy image made by -@clove
#58May 1, 2021 20:40:32
xXName77Xx
Scratcher
35 posts

The Beeb - a full BBC Microcomputer emulator

BTW: turbo mode is the same as overclocking lol.
#59May 9, 2021 15:20:24
njdavison
Scratcher
34 posts

The Beeb - a full BBC Microcomputer emulator

Persian
BBC Microcomputer User Guide | 6 Sample programs | Page 46
  • Load the user disk from code
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  • <Shift> Break to run
  • or copy the basic code below, save in a text file, click paste, then import.
  • or for the true retro feel ask a friend to read the BASIC code very slowly whilst you type.
10 REM PERSIAN
20 REM ACORN COMPUTERS
30 REM VERSION 2 / 16 NOV 81
40 MODE 1
50 D%=4
60 VDU 19,2,RND(3)+1,0,0,0
70 VDU 19,3,RND(3)+4,0,0,0
80 VDU 29,640;512;
90 J1%=0
100 FOR K%=500 TO 380 STEP -40
110 REPEATJ2%=RND(3):UNTILJ2%<>J1%
120 J1%=J2%
130 GCOL 3, J1%
140 FOR I%=-K% TO K% STEP D%
150 MOVE K%,I%
160 DRAW -K%,-I%
170 MOVE I%,-K%
180 DRAW -I%,K%
190 NEXT
200 NEXT
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#60May 9, 2021 15:24:37
njdavison
Scratcher
34 posts

The Beeb - a full BBC Microcomputer emulator

If you want to make your own disks bootable then you need to create a !BOOT file. This is effectively a file that is automatically entered into the keyboard when you execute it. Simply type BUILD !BOOT. Enter what you want the boot file to do - for example, CHAIN “MYPROG” followed by the enter key - and then press escape. That's the !BOOT file created. To make the disk bootable you need to type *OPT 4,3. If you now *CAT the disk you will see that it says OPTION 3 (EXEC) where it used to say OPTION 0 (OFF). Your disk is now bootable.
To build the !BOOT file type
*BUILD !BOOT
The * is missing in the original post.
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