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: 5118
- 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
ZX81 Variations
ZX81 Chip Pin-outs
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Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
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