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
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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
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum
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
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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
