Radio Shack TRS-80 Color Computer / 4K, 16K, or 32K Memory

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I lost my computer password

How can I retrive my password im my computer. I cannot remeber and Ihave many photos. Thanks.

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if it has the original Os it should be a TRS DOS system. Wow, you are really still using it. that is great. Anyhow, explain more about the password. Do you need a password to start your computer or do you need it to access your files? Have you tried "Password" as a password? What media are the photos stored on, hard drive floppy?

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This is a very old computer--what operating system are you using? You can call up this link for info on the TRS-80. In particular look at item 11. Good luck.

http://www.tim-mann.org/trs80faq.html#[11]

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search in google kon boot software free...try to download it and it have the instruction how to make a usb image in pen drive,then insert into your computer try to boot from usb drive now program starts automatically then it restart the computer after the minute now you can login without password..then change it new password...

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This computer does not have USB connections--data entry is by keyboard or 5.25" floppy disk. In some cases data entry is by cassette tape.

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just downloaded the software and gave it a test drive. Looks like a Windows/Linux piece of software. Not a bad piece but definitely not for the TRS-80

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have you tried

1) password

2) names and/or date of births of family, friends, pets, etc

3) 1234,123456,1234567,13579, etc.

4) something that you would have said or done in the 1970's (disco, groovy, far out, etc)

5) any of the above with a number1 or a symbol@ or AlTeRnAtInG cApItAlIzAtIoN or ALL CAPS?

try those.

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The table below is based partly on documentation and partly on actual test. Where a filename matches more than one pattern, use the first one that matches. If a password doesn't work, try others from the table and let me know of the error. If you have password information for other Model I/III/4 operating systems, let me know. The values in the TRSDOS 6 column should also work for versions of LS-DOS prior to 6.3.1.

Files LDOS 5.1.0 LDOS 5.3.1 TRSDOS 6 LS-DOS 6.3.1

----- ---------- ---------- -------- ------------

basic/* (unused) basic basic basic

lbasic/* basic (unused) (unused) (unused)

config/sys ccc ccc ccc ccc

*/sys wolves system lsidos system6

*/flt gsltd filter filter filter

*/dvr gsltd driver driver driver

*/dct rrw3 driver utility driver or utility

*/cmd rrw3 utility utility utility

*/hlp (unused) help (unused) help

back door rs0lt0ff rs0lt0ff (nflag$ bit7) (nflag$ bit7)

The password listed as "back door" gives you access to all files regardless of what their real passwords are. It's documented! I confirmed by looking at the source code that TRSDOS/LS-DOS 6 has no such password, but I found that later versions of it have another, undocumented back door: if you turn on bit 7 of NFLAG$, all file password checking is disabled. The command MEMORY (A="N", B=128) will do this. This back door can be found in TRSDOS 6.2 and LS-DOS 6.3.1, but not in TRSDOS 6.1.2.

Model I TRSDOS 2.3 also has a back door password; the originally intended password is unknown, but the string "ubett" hashes to the correct value and can be used. The strings "f3gum", "nv36", and many others also work. VTOS 3.0 also has such a back door; the password "hadu" can be used.

The password "password" is a standard default in the TRS-80 world. If you're insistently prompted for a password in a situation where you don't think a password should be needed, try "password".

Another way to reconstruct TRS-80 passwords is through exhaustive search. This is quite fast because TRS-80 operating systems hash their passwords down to 16-bit values, so you need only find some password that hashes to the same value, not the exact original password. Here is a C program to do that.

/* trspwhash

  • Usage: trspwhash password // Hash a password

* trspwhash -u 0xhash // Unhash a password to letters

* trspwhash -n 0xhash // Unhash a password to letters and digits

*/

#include <stdio.h>

unsigned int

pwhash(unsigned char pw[8])

{

unsigned char *p = &pw[7];

unsigned int count = 8;

unsigned int hl, t1, t2;

hl = 0xffff;

do {

t1 = hl & 0x07;

t2 = hl & 0xff;

hl = (t1 << 13) ^ (t1 << 9) ^ (t1 << 2) ^

(t2 << 8) ^ (t2 << 4) ^ (t2 >> 3) ^

(hl >> 8) ^ (*p-- << 8);

} while (--count);

return hl;

}

void

usage()

{

fprintf(stderr, "usage: trspwhash [-u | -n] arg\n");

exit(1);

}

int

main(int argc, char **argv)

{

unsigned int goal;

unsigned char pw[16];

int i;

if (argc == 2) {

strncpy(pw, argv[1], 8);

pw[8] = '\0';

strcat(pw, " ");

for (i = 0; i < 8; i++) {

if (islower(pw[i])) pw[i] = toupper(pw[i]);

}

printf("%04x\n", pwhash(pw));

} else if (argc == 3 && strcmp(argv[1], "-u") == 0) {

goal = strtoul(argv[2], (void*)0, 0);

strcpy(pw, " ");

for (;;) {

if (pwhash(pw) == goal) printf("%s\n", pw);

i = 0;

for (;;) {

switch (pw[i]) {

case ' ':

pw[i] = 'A';

break;

case 'Z':

pw[i] = 'A';

i++;

if (i == 8) exit(0);

continue;

default:

pw[i]++;

break;

}

break;

}

}

} else if (argc == 3 && strcmp(argv[1], "-n") == 0) {

goal = strtoul(argv[2], (void*)0, 0);

strcpy(pw, " ");

for (;;) {

if (pwhash(pw) == goal) printf("%s\n", pw);

i = 0;

for (;;) {

switch (pw[i]) {

case ' ':

pw[i] = 'A';

break;

case 'Z':

pw[i] = '0';

break;

case '9':

pw[i] = 'A';

i++;

if (i == 8) exit(0);

continue;

default:

pw[i]++;

break;

}

break;

}

}

} else {

usage();

}

return 0;

}

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