Need for speed - the ROM-patches

Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81
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zsolt
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Joined: Wed Apr 20, 2011 11:43 am
Location: Fót, Hungary

Re: Need for speed - the ROM-patches

Post by zsolt » Mon Aug 28, 2017 4:04 pm

Hi Siggi,
Over the past few months I did not deal with this problem, but I spent a lot of time writing and testing new arithmetic routines.
They are now faster and a bit smaller :!: coming soon. :D
Regards,
Zsolt
ZX81 (8K), ENTERPRISE 128, [ZX SPECTRUM (48K,+,+128K,+2,+2A), TS1000, TS1500, TS2068, Cambridge Z88, PRIMO A64 (red)]

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zsolt
Posts: 174
Joined: Wed Apr 20, 2011 11:43 am
Location: Fót, Hungary

Re: Need for speed - the ROM-patches

Post by zsolt » Thu Apr 05, 2018 3:39 pm

Hi,

I built a new ROM image using the renewed arithmetics and a little patch in the 'NEXT' routine. :D :D :D
SG81F_BN.png
ClckFreq.p (performed on sz81)
SG81F_BN.png (4.7 KiB) Viewed 484 times
Enjoy,
Zsolt
Attachments
SG81F_ROM.ZIP
(75.09 KiB) Downloaded 23 times
ZX81 (8K), ENTERPRISE 128, [ZX SPECTRUM (48K,+,+128K,+2,+2A), TS1000, TS1500, TS2068, Cambridge Z88, PRIMO A64 (red)]

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Andy Rea
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Location: notts UK

Re: Need for speed - the ROM-patches

Post by Andy Rea » Thu Apr 05, 2018 5:23 pm

very nice work indeed... i should with this ROM be able to break the 1000% speed increase barrier with my 20Mhz uber zeddy.. best to date is 960%

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

Moggy
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Joined: Wed Jun 18, 2008 2:00 pm

Re: Need for speed - the ROM-patches

Post by Moggy » Thu Apr 05, 2018 5:33 pm

Andy Rea wrote:
Thu Apr 05, 2018 5:23 pm
very nice work indeed... i should with this ROM be able to break the 1000% speed increase barrier with my 20Mhz uber zeddy.. best to date is 960%

regards Andy
Will this uber zeddy speed up ZXChess on level 5 ? :lol:

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Andy Rea
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Joined: Fri May 09, 2008 2:48 pm
Location: notts UK

Re: Need for speed - the ROM-patches

Post by Andy Rea » Sat Apr 14, 2018 11:25 pm

wow... the fastest Zeddy in the west !
Image

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

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