Home » Archimedes archive » Archimedes World » AW-1996-08.adf » !6502DEm_6502Dem » Docs/Trouble

Docs/Trouble

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Archimedes World » AW-1996-08.adf » !6502DEm_6502Dem
Filename: Docs/Trouble
Read OK:
File size: 0452 bytes
Load address: 0000
Exec address: 0000
File contents
6502Em: Troubleshooting
=======================

The Emulator runs too slowly
----------------------------

The emulator can be speeded up by turning off the 'Exact Speed'
and the 'Sound' options.
Turning on the 'Scroll Hack' option may also speed up some games.

Game will run from Tapefile but not from Virtual DFS
----------------------------------------------------

Although VDFS does not need memory from &E00 TO &1900
some games corrupt the extended vector workspace in &D
page which is necessary for Sideways ROMs to work.
The 'Disable Tape' option can sometimes cure this.

Screen is corrupted
-------------------

You can press f10 to refresh the screen.

Screen flickers and colours change rapidly
------------------------------------------

Some games change the palette half-way down the screen
which is not supported by the emulator.
A partial solution is to turn off the palette from the options
menu. You can then press f10 inside the emulator until you get
a desirable set of colours.

I can't change drive
--------------------

You must use a command like '*DIR ADFS::0.$' to change drive
00000000  36 35 30 32 45 6d 3a 20  54 72 6f 75 62 6c 65 73  |6502Em: Troubles|
00000010  68 6f 6f 74 69 6e 67 0a  3d 3d 3d 3d 3d 3d 3d 3d  |hooting.========|
00000020  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 0a  |===============.|
00000030  0a 54 68 65 20 45 6d 75  6c 61 74 6f 72 20 72 75  |.The Emulator ru|
00000040  6e 73 20 74 6f 6f 20 73  6c 6f 77 6c 79 0a 2d 2d  |ns too slowly.--|
00000050  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00000060  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 0a 0a 54 68 65 20  |----------..The |
00000070  65 6d 75 6c 61 74 6f 72  20 63 61 6e 20 62 65 20  |emulator can be |
00000080  73 70 65 65 64 65 64 20  75 70 20 62 79 20 74 75  |speeded up by tu|
00000090  72 6e 69 6e 67 20 6f 66  66 20 74 68 65 20 27 45  |rning off the 'E|
000000a0  78 61 63 74 20 53 70 65  65 64 27 0a 61 6e 64 20  |xact Speed'.and |
000000b0  74 68 65 20 27 53 6f 75  6e 64 27 20 6f 70 74 69  |the 'Sound' opti|
000000c0  6f 6e 73 2e 0a 54 75 72  6e 69 6e 67 20 6f 6e 20  |ons..Turning on |
000000d0  74 68 65 20 27 53 63 72  6f 6c 6c 20 48 61 63 6b  |the 'Scroll Hack|
000000e0  27 20 6f 70 74 69 6f 6e  20 6d 61 79 20 61 6c 73  |' option may als|
000000f0  6f 20 73 70 65 65 64 20  75 70 20 73 6f 6d 65 20  |o speed up some |
00000100  67 61 6d 65 73 2e 0a 0a  47 61 6d 65 20 77 69 6c  |games...Game wil|
00000110  6c 20 72 75 6e 20 66 72  6f 6d 20 54 61 70 65 66  |l run from Tapef|
00000120  69 6c 65 20 62 75 74 20  6e 6f 74 20 66 72 6f 6d  |ile but not from|
00000130  20 56 69 72 74 75 61 6c  20 44 46 53 0a 2d 2d 2d  | Virtual DFS.---|
00000140  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
00000170  2d 0a 0a 41 6c 74 68 6f  75 67 68 20 56 44 46 53  |-..Although VDFS|
00000180  20 64 6f 65 73 20 6e 6f  74 20 6e 65 65 64 20 6d  | does not need m|
00000190  65 6d 6f 72 79 20 66 72  6f 6d 20 26 45 30 30 20  |emory from &E00 |
000001a0  54 4f 20 26 31 39 30 30  0a 73 6f 6d 65 20 67 61  |TO &1900.some ga|
000001b0  6d 65 73 20 63 6f 72 72  75 70 74 20 74 68 65 20  |mes corrupt the |
000001c0  65 78 74 65 6e 64 65 64  20 76 65 63 74 6f 72 20  |extended vector |
000001d0  77 6f 72 6b 73 70 61 63  65 20 69 6e 20 26 44 0a  |workspace in &D.|
000001e0  70 61 67 65 20 77 68 69  63 68 20 69 73 20 6e 65  |page which is ne|
000001f0  63 65 73 73 61 72 79 20  66 6f 72 20 53 69 64 65  |cessary for Side|
00000200  77 61 79 73 20 52 4f 4d  73 20 74 6f 20 77 6f 72  |ways ROMs to wor|
00000210  6b 2e 0a 54 68 65 20 27  44 69 73 61 62 6c 65 20  |k..The 'Disable |
00000220  54 61 70 65 27 20 6f 70  74 69 6f 6e 20 63 61 6e  |Tape' option can|
00000230  20 73 6f 6d 65 74 69 6d  65 73 20 63 75 72 65 20  | sometimes cure |
00000240  74 68 69 73 2e 0a 0a 53  63 72 65 65 6e 20 69 73  |this...Screen is|
00000250  20 63 6f 72 72 75 70 74  65 64 0a 2d 2d 2d 2d 2d  | corrupted.-----|
00000260  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 0a 0a  |--------------..|
00000270  59 6f 75 20 63 61 6e 20  70 72 65 73 73 20 66 31  |You can press f1|
00000280  30 20 74 6f 20 72 65 66  72 65 73 68 20 74 68 65  |0 to refresh the|
00000290  20 73 63 72 65 65 6e 2e  0a 0a 53 63 72 65 65 6e  | screen...Screen|
000002a0  20 66 6c 69 63 6b 65 72  73 20 61 6e 64 20 63 6f  | flickers and co|
000002b0  6c 6f 75 72 73 20 63 68  61 6e 67 65 20 72 61 70  |lours change rap|
000002c0  69 64 6c 79 0a 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |idly.-----------|
000002d0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
000002e0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 0a  |---------------.|
000002f0  0a 53 6f 6d 65 20 67 61  6d 65 73 20 63 68 61 6e  |.Some games chan|
00000300  67 65 20 74 68 65 20 70  61 6c 65 74 74 65 20 68  |ge the palette h|
00000310  61 6c 66 2d 77 61 79 20  64 6f 77 6e 20 74 68 65  |alf-way down the|
00000320  20 73 63 72 65 65 6e 0a  77 68 69 63 68 20 69 73  | screen.which is|
00000330  20 6e 6f 74 20 73 75 70  70 6f 72 74 65 64 20 62  | not supported b|
00000340  79 20 74 68 65 20 65 6d  75 6c 61 74 6f 72 2e 0a  |y the emulator..|
00000350  41 20 70 61 72 74 69 61  6c 20 73 6f 6c 75 74 69  |A partial soluti|
00000360  6f 6e 20 69 73 20 74 6f  20 74 75 72 6e 20 6f 66  |on is to turn of|
00000370  66 20 74 68 65 20 70 61  6c 65 74 74 65 20 66 72  |f the palette fr|
00000380  6f 6d 20 74 68 65 20 6f  70 74 69 6f 6e 73 0a 6d  |om the options.m|
00000390  65 6e 75 2e 20 59 6f 75  20 63 61 6e 20 74 68 65  |enu. You can the|
000003a0  6e 20 70 72 65 73 73 20  66 31 30 20 69 6e 73 69  |n press f10 insi|
000003b0  64 65 20 74 68 65 20 65  6d 75 6c 61 74 6f 72 20  |de the emulator |
000003c0  75 6e 74 69 6c 20 79 6f  75 20 67 65 74 0a 61 20  |until you get.a |
000003d0  64 65 73 69 72 61 62 6c  65 20 73 65 74 20 6f 66  |desirable set of|
000003e0  20 63 6f 6c 6f 75 72 73  2e 0a 0a 49 20 63 61 6e  | colours...I can|
000003f0  27 74 20 63 68 61 6e 67  65 20 64 72 69 76 65 0a  |'t change drive.|
00000400  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00000410  2d 2d 2d 2d 0a 0a 59 6f  75 20 6d 75 73 74 20 75  |----..You must u|
00000420  73 65 20 61 20 63 6f 6d  6d 61 6e 64 20 6c 69 6b  |se a command lik|
00000430  65 20 27 2a 44 49 52 20  41 44 46 53 3a 3a 30 2e  |e '*DIR ADFS::0.|
00000440  24 27 20 74 6f 20 63 68  61 6e 67 65 20 64 72 69  |$' to change dri|
00000450  76 65                                             |ve|
00000452