Timex 2048 only 16k
Timex 2048 only 16k
Hi
I'm new here.
I bought a Timex 2048 from Portugal, and I realized that something was wrong. I type:
PRINT PEEK 23733
Output was: 127.
I load jetpac and work fine. Then I try to load a 48k games and it doesn't work.
Can it be a memory chip?
I'm new here.
I bought a Timex 2048 from Portugal, and I realized that something was wrong. I type:
PRINT PEEK 23733
Output was: 127.
I load jetpac and work fine. Then I try to load a 48k games and it doesn't work.
Can it be a memory chip?
- 1024MAK
- Posts: 4192
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Timex 2048 only 16k
Hello,
What does PRINT PEEK 23732 + PEEK 23733 * 256 return?
Here’s a 48K ZX Spectrum quick ‘n simple RAM test. I’ve not tried it on a Timex 2048.
RAM test, test one address only looking for a bit error. Again written for a ZX Spectrum. Not tested on a Timex 2048.
Use an address reported as faulty from the above program.
Mark
What does PRINT PEEK 23732 + PEEK 23733 * 256 return?
Here’s a 48K ZX Spectrum quick ‘n simple RAM test. I’ve not tried it on a Timex 2048.
Code: Select all
1 CLEAR 24999
2 FOR a=25000 TO 65535 STEP 250
3 PRINT AT 0,0;a: POKE a,0: LET d=PEEK a: IF d<>0 THEN GO SUB 8
4 POKE a,255: LET d=PEEK a: IF d<>255 THEN GO SUB 8
5 NEXT a
6 PRINT “done”: STOP
8 PRINT “error at “;a;” “;d
9 RETURN
Use an address reported as faulty from the above program.
Code: Select all
1 CLEAR 25999
2 PRINT “Enter address to test”
3 INPUT a
4 PRINT “Address ”;a
5 FOR c=1 TO 4
6 READ t
7 POKE a,t: LET d=PEEK a
8 PRINT “Value written ”;t;“ value read ”;d
9 NEXT c
10 DATA 0,85,170,255
Re: Timex 2048 only 16k
PRINT PEEK 23732 + PEEK 23733 * 256
Output:
32767
Output:
32767
Re: Timex 2048 only 16k
1024MAK wrote: ↑Sat May 28, 2022 7:50 pm Hello,
What does PRINT PEEK 23732 + PEEK 23733 * 256 return?
Here’s a 48K ZX Spectrum quick ‘n simple RAM test. I’ve not tried it on a Timex 2048.
It gets errors after address 33000 .Code: Select all
1 CLEAR 24999 2 FOR a=25000 TO 65535 STEP 250 3 PRINT AT 0,0;a: POKE a,0: LET d=PEEK a: IF d<>0 THEN GO SUB 8 4 POKE a,255: LET d=PEEK a: IF d<>255 THEN GO SUB 8 5 NEXT a 6 PRINT “done”: STOP 8 PRINT “error at “;a;” “;d 9 RETURN
Re: Timex 2048 only 16k
Sp1d3r, it's very interesting what you said. My has four 4164 chips. Some one made a mistake. Só don't you think?
Re: Timex 2048 only 16k
can I use an mk4116n-2 to substitute the 4416 chips?
Re: Timex 2048 only 16k
Here's a pic of my TC2048, it has 2 4416 and 2 41464 chips but this is possibly a different version because it looks like yours has a different mix of DRAM chips.
Last edited by sP1d3r on Wed Jun 29, 2022 10:26 am, edited 1 time in total.
Re: Timex 2048 only 16k
My has more 2x4164 chips, Here