derkom's attempt

[Icky]

Nice work @derkom.

Before you put your BAD DMA socket in read this https://www.exxosforum.co.uk/forum/viewt ... 984#p28984

[derkom]

Before you put your BAD DMA socket in read this https://www.exxosforum.co.uk/forum/viewt ... 984#p28984

Heh, precisely why I skipped that resistor for now. Figured I would want to check how well it plays with that socket first.

[derkom]

DTACK FIX

H4-004.jpg (53.9 KiB) Viewed 3825 times

Edit: Fixed before anyone else notices!

[exxos]

Not sure that is right.. I flipped the image to see better....

Capture.PNG (171.54 KiB) Viewed 3828 times

[derkom]

Hah, whoops, you're right.

Edit: Fixed above.

[Icky]

@derkom - I had the same problems on the ALPHA. I can never tell my left from my right so I got into the habit of flipping the image like @exxos did.

[derkom]

@derkom - I had the same problems on the ALPHA. I can never tell my left from my right so I got into the habit of flipping the image like @exxos did.

I used to be good at this stuff. I seem to be losing my spatial relations skills in my old age.

@exxos, did you see my question about TOS ROM above? Can I reuse the ROM from the alpha, or will I need to acquire a different one for H4?

[Icky]

@derkom - I had the same problems on the ALPHA. I can never tell my left from my right so I got into the habit of flipping the image like @exxos did.

I used to be good at this stuff. I seem to be losing my spatial relations skills in my old age.

@exxos, did you see my question about TOS ROM above? Can I reuse the ROM from the alpha, or will I need to acquire a different one for H4?

You can re-use the one from the ALPHA

[derkom]

You can re-use the one from the ALPHA

Super. Thanks.

[derkom]

A question about QG1 ("CRYSTAL 32MHz"): I have a 32.00000 MHz oscillator in DIP-14 package, but I notice the link to @exxos's store is for a 32.084988 MHz unit. What's the difference going to cause here? Is my 32 MHz appropriate?