Bikerbob's H5 C1 build

Post by **PhilC** » 21 Sep 2021 14:10

@Bikerbob meter out all lines from the WD1772 to the floppy. Usually the floppy should be quiet. It is worth removing the GAL and checking it in a standard format but as far as I am aware, this should make no difference as its really only to do with 8 - 16mhz switching to the WD1772.

Bikerbob · Post by **Bikerbob** » 21 Sep 2021 18:52

PhilC wrote: 21 Sep 2021 14:10 @Bikerbob meter out all lines from the WD1772 to the floppy. Usually the floppy should be quiet. It is worth removing the GAL and checking it in a standard format but as far as I am aware, this should make no difference as its really only to do with 8 - 16mhz switching to the WD1772.

So the idea being that maybe my 1772 cannot do the 16mhz? Do I just remove the gal and change a jumper and the floppy should work as normal?

This is fine, I guess more concerning is the desktop info crash.

James

Post by **PhilC** » 21 Sep 2021 19:02

Yes just remove the chip and I think its jumper j22 which is next to the DMA will need setting to 2-3 IIRC

Bikerbob · Post by **Bikerbob** » 21 Sep 2021 20:39

OK, so I am using Atari floppy drives. SMD-380 and SMD-340

SO jumper 18 and 19 - Do I need to set them? IF I FORCE 1.44 mode on the 1.44 drive it will read and write everything?

Do I do the HD select on the SMD-340? or is this just if I am using the Sony compatible 920? I am not finding a lot of info on this.

I know the Desktop info is related to this issue.. because I booted 2.06 with no floppy in drive.. and was able to get to desktop info.. if I put a floppy in and accessed it.. then next time I go to desktop info mouse stops working.

James

edit

Used Exxos diag cart.. before menu comes up - I7 bus error detected. Then continues..

Another thing.. in the Cart Menu (A)udio - if I do it right away after a cold boot.. I get the A sound --- fading away B is barley audible and C no.. and from that point on.. going into (A)udio gets me nothing.. But it does come up Green.. aka passed.

Post by **exxos** » 22 Sep 2021 00:18

Bikerbob wrote: 21 Sep 2021 20:39 SO jumper 18 and 19 - Do I need to set them? IF I FORCE 1.44 mode on the 1.44 drive it will read and write everything?

The jumpers force 720k or 1.44 mode, if you have the GAL fitted with 1.44 mode forced, with a 1.44 drive, then it will work with 1.44 floppies only.

Bikerbob wrote: 21 Sep 2021 20:39 Do I do the HD select on the SMD-340? or is this just if I am using the Sony compatible 920? I am not finding a lot of info on this.

I only use the MPF920. You add the HD select wire as shown on my website to get automatic 720k / 1.44 switching.

Bikerbob wrote: 21 Sep 2021 20:39 Used Exxos diag cart.. before menu comes up - I7 bus error detected. Then continues..

Is this with my TOS206 decorder board ? If so then its nothing to worry about.

Bikerbob wrote: 21 Sep 2021 20:39 Another thing.. in the Cart Menu (A)udio - if I do it right away after a cold boot.. I get the A sound --- fading away B is barley audible and C no.. and from that point on.. going into (A)udio gets me nothing.. But it does come up Green.. aka passed.

You need to read the fixes thread..

Bikerbob · Post by **Bikerbob** » 22 Sep 2021 04:33

exxos wrote: 22 Sep 2021 00:18 The jumpers force 720k or 1.44 mode, if you have the GAL fitted with 1.44 mode forced, with a 1.44 drive, then it will work with 1.44 floppies only.

Bikerbob wrote: 21 Sep 2021 20:39 Do I do the HD select on the SMD-340? or is this just if I am using the Sony compatible 920? I am not finding a lot of info on this.
I only use the MPF920. You add the HD select wire as shown on my website to get automatic 720k / 1.44 switching.

Ok, so if I want to use an smd-340 and read both 720k and 1.44m floppies how do I set it up?

Thanks I will look at the fixes thread.

James

Post by **exxos** » 22 Sep 2021 05:06

Bikerbob wrote: 22 Sep 2021 04:33 Ok, so if I want to use an smd-340 and read both 720k and 1.44m floppies how do I set it up?

I've no idea sorry, I've only really used the MPF920 drives for like 20 years. Back in the day I tested many common drives out, but none were ever as good as the MPF drives. So never looked back.

Bikerbob · Post by **Bikerbob** » 22 Sep 2021 16:17

exxos wrote: 22 Sep 2021 05:06
Bikerbob wrote: 22 Sep 2021 04:33 Ok, so if I want to use an smd-340 and read both 720k and 1.44m floppies how do I set it up?
I've no idea sorry, I've only really used the MPF920 drives for like 20 years. Back in the day I tested many common drives out, but none were ever as good as the MPF drives. So never looked back.

The SMD-340 is the original 1.44mb drive Atari used. I have about 6 of them that are good. I guess if I have to I can find a 920. Were there not some 920s that were good and some that were not?

James

Post by **exxos** » 22 Sep 2021 16:23

Bikerbob wrote: 22 Sep 2021 16:17 The SMD-340 is the original 1.44mb drive Atari used. I have about 6 of them that are good. I guess if I have to I can find a 920. Were there not some 920s that were good and some that were not?

https://www.exxosforum.co.uk/atari/last/ ... d/main.htm

Bikerbob · Post by **Bikerbob** » 22 Sep 2021 22:30

OK, AUDIO fixed. (my 100K was a bit large, but made it work)

Floppy issues fixed with a 920 drive and a HD select to pin 2 of HD cable.. all good. Now no jumper on 18 or 19. Set on 16mhz for WD1772 and working. No issues now with Desktop info (because the drive is not ticking over constantly polling?)

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And running dungeon master.

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I am running my COSMOSex off the DMA - working great.

DID not have Gembench 6 on that SD card.. so just gembench 3.

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Bikerbob's H5 C1 build

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