V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Help & information about the V2.X series boosters.
Elliot
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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by Elliot » Tue Jan 14, 2020 12:50 pm

I have never seen the TOS memcheck indicate an error - so thats what happens......

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Tue Jan 14, 2020 6:48 pm

Who'da man 8-) 8-)

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Tue Jan 14, 2020 8:37 pm

@PhilC Once you done this viewtopic.php?f=78&t=2335&p=31893#p31893 and you get your SEC booster running (ask @Icky for images how to fit it to the H4 ;) ) See if ultrasatan and the floppy drive behave. Icky can't get ultrasatan working correctly with the SEC installed. Though its all currently working fine on my STFM here.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by PhilC » Tue Jan 14, 2020 8:40 pm

@exxos will do. Will start with a good STFM and once that works, move on to the H4.
If it ain't broke, test it to Destruction.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by Icky » Wed Jan 15, 2020 7:18 am

After discussing with @exxos it seemed to be the Blitter causing the issue. After removing Blitter the floppy and UltraSATAN works together. However am still having issues with Gigafile.

@PhilC - just go straight for the H4. It’s a very easy install.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by PhilC » Wed Jan 15, 2020 8:00 am

Icky wrote:
Wed Jan 15, 2020 7:18 am
After discussing with @exxos it seemed to be the Blitter causing the issue. After removing Blitter the floppy and UltraSATAN works together. However am still having issues with Gigafile.

@PhilC - just go straight for the H4. It’s a very easy install.
Will do @Icky
If it ain't broke, test it to Destruction.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Wed Jan 15, 2020 1:59 pm

It be interesting what speed you get with tos206 with glitter as I've still got slower than expected speeds on my stfm. I get 175% first test but the ste is 181% but as ROM is faster on the sec the speeds should be more like 190%.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Wed Jan 15, 2020 11:40 pm

Been doing a lot of tweaks. Getting TOS104, TOS206, BLITTER, ULTRASATAN all to play nice is a nightmare.

Mostly , for some odd reason, TOS104 I need to wait for ST_DTACK to go high before allowing any ROM decoding to happen. TOS206 doesn't seem to care.. Without that sync delay, TOS104 resets when accessing C: drive, TOS206 doesn't. ROM speed has dropped a bit, but still at 309%. First GB6 test has dropped from 172% to 163%... will fiddle more tomorrow.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Thu Jan 16, 2020 4:27 pm

This isn't a very exciting test.. But I kept reducing the DTACK pull up (about 434R now!) To see what would happen, and the figures have gone up ever so slightly..

dt.jpg
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I think what the problem is in terms of ROM speed access, is that because ST_DTACK is so slow, I have to wait for it to go high before I let the CPU read DTACK as issued by the PLD logic. Otherwise the CPU reads the end of the ST_DTACK cycle and completes ROM access a lot sooner, normally before ROM is even ready.


A edit to the ROM code and we jump to 345%. I think thats as good as its ever going to get.

dt2.jpg
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I removed my DTACK resistors and got 164% first test, and it crashed on the second test :roll: Either way DTACK will likely need a lower value to gain the extra speed.

Next to try about 600R on ST_DTACK.. First GB6 test 163% and ROM speed is 309% again. So seems 400R is needed , thats a little low really.


more to come later...
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by PhilC » Thu Jan 16, 2020 8:38 pm

My board arrived today, hope to test it out tomorrow. :cheer: :cheer:
If it ain't broke, test it to Destruction.

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