Has anyone ever tried this?
This seems so simple even I, soldering challenged that I am, could install it!
What could I expect the display to look like on a T/S1000 with LCD and Pokemon's ZX8-CCB installed?
Regards;
Greg
T/S1000 Turbo Switch
T/S1000 Turbo Switch
- Attachments
-
- Turbo Switch.zip
- Article scans
- (102.71 KiB) Downloaded 199 times
Re: T/S1000 Turbo Switch
all it appears to be doing is switching from 60hz to 50hz, giving the CPU more program execution time.
Regards Andy
Regards Andy
what's that Smell.... smells like fresh flux and solder fumes...
Re: T/S1000 Turbo Switch
As Andy said, switching between 60Hz and 50Hz ... in real terms the speed increase up to 30% in SLOW mode. In the FAST mode it does not make any difference at all.
If you are looking for a real speed-up solution, go for the modification called "noWAIT".
If you are looking for a real speed-up solution, go for the modification called "noWAIT".
Claudius
----------
----------
Re: T/S1000 Turbo Switch
Back in 2005 I did some testing on various ways of speeding up the TS1000:
The program that I used for benchmarking the ZX81, TS1000, TS1500 and ZX81 emulator grew out of a conversation on the board about speeding up Sinclair Basic:
5 LET A=40
10 LET S=PEEK 16436+256*PEEK 16437
20 FOR K=1 TO 1000
40 NEXT K
50 LET E=PEEK 16436+256*PEEK 16437
60 PRINT S,E,S-E
The test was to see how the speed changed based on using different values for "Goto" and is in frames (60 frames per second in US).
A few things of note from these tests:
The ZX81 is MUCH faster than the TS1000, even allowing for the 50hz versus 60hz of the US model.
The TS1500 is consistantly a few frames slower than the TS1000
There is no "real" way to test FAST mode since the FRAMES variable (locations 16436 & 16437) are not updated
Look at the results of the compiled version!
* Speeds for the ZX81 provided by Tarquin Mills of the ACCUS (Anglia Classic Computer Users Society) http://www.speccyverse.me.uk/comp/accus/
** Mcoder doesn't allow the use of strings so these tests could not be performed.
*** I "hacked" a TS1000 by cutting the R30 resistor to make it run at 50HZ instead of 60HZ. Though the screen rolls on my US TV, the speed pick up is about 60% over the standard 60HZ machine!
http://forum.tlienhard.com/TS1000/www.t ... sembly.htm
Bill H
The program that I used for benchmarking the ZX81, TS1000, TS1500 and ZX81 emulator grew out of a conversation on the board about speeding up Sinclair Basic:
5 LET A=40
10 LET S=PEEK 16436+256*PEEK 16437
20 FOR K=1 TO 1000
40 NEXT K
50 LET E=PEEK 16436+256*PEEK 16437
60 PRINT S,E,S-E
The test was to see how the speed changed based on using different values for "Goto" and is in frames (60 frames per second in US).
A few things of note from these tests:
The ZX81 is MUCH faster than the TS1000, even allowing for the 50hz versus 60hz of the US model.
The TS1500 is consistantly a few frames slower than the TS1000
There is no "real" way to test FAST mode since the FRAMES variable (locations 16436 & 16437) are not updated
Look at the results of the compiled version!
* Speeds for the ZX81 provided by Tarquin Mills of the ACCUS (Anglia Classic Computer Users Society) http://www.speccyverse.me.uk/comp/accus/
** Mcoder doesn't allow the use of strings so these tests could not be performed.
*** I "hacked" a TS1000 by cutting the R30 resistor to make it run at 50HZ instead of 60HZ. Though the screen rolls on my US TV, the speed pick up is about 60% over the standard 60HZ machine!
http://forum.tlienhard.com/TS1000/www.t ... sembly.htm
Bill H
Re: T/S1000 Turbo Switch
Is that "WhyWait" or "NoWait"? "WhyWait" is only 10% improvement.
5-TS1000,UK ZX81<-Sheelagh, US ZX81, 2-TS1500/KDLX , 3-TS2040 printer, 2-TS2020 cassette decks, ZXPAND+AY, ZeddyNET, ZXBlast, UDG, ZX8CCB, AERCO, BUILDS/REPAIRS ZX Spectrum, ZX80 Minstrel, ZXMAX48 v1 v2, 2-TS-2068, ROM, 16kRAM
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: T/S1000 Turbo Switch
ZX81 Variations
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.
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.