Activity Stream

I see where it says "Restore OSCCAL". Well, maybe we can make it work anyway. Change the word at 03FF to 34 40. (pulling a value out of the...

and here is the config available for the programmer

I have another PIC, but reading it seem to show 03ff has value of 3F as well. Here screenshot of content read of an new unprogrammed PIC.

The upper 2 bits set to 0 on the odd bytes is correct--the program memory in a PIC12 is 14 bits wide. However Your programmer over-wrote the...

An update. The second half of the following is mostly about "RAL Design" colours and the use of paint. See also: "freebies". RAL Classic: there...

Thanks. It looks like it's a private group, but I've asked for permission to join. Until then I cannot see anything there.

You'll have to wait for bitfixer to release it, like I said, I'm just helping beta test.

and the configuration value at address 400EH-400FH is D431

I thought EDLIN was dropped by DOS 5 or at least certainly never was included in Windows. Did they add it back to Win10 trying to be cool? EDIT:...

Did you check the internal ground cable if it has a good connection? That would be where I'd look if the keyboard behaved like that.

so indeed the programmer changed something. Here I attached comparison of content of HEX file and what I read from the PIC. read from PIC: ...

the value is 3F, here i attached a screenshot

I take it that your programmer did not modify location 03ffh, and did program the configuration fuses as the source shows: __CONFIG ...

There was a shift in the early to mid 90s of barrel connectors going from center negative to center positive, where most devices before that time had...

Ah, yes, enlightening. So it's actually a multiplexed data/address bus and one can *only* assume the address is valid while /ADS is active.

Epyx World Games is a booter, so you will not see any files on the disk when you look at it under DOS. Have you tried booting it on an appropriate...

I had the same thought. According to pages 17-18 in this PDF there is an address strobe line /ADS which goes low to indicate a valid address. I...

Strange. There used to be a stock number for the 6" bands--SF-6500, package of 50 (I have one such here). Perhaps a pleading to...

Thanks for pointing that out; I hadn't really considered that properly.

The board is a J-Mark Computer Corporation OPTI-495SX 3/486WB v1.1 and it has a 238 pin LIF Socket 2 for the 486 CPUs and a 387 LIF socket in the...

Thanks for the info. While I was waiting for replies I went ahead and ordered a Hayes 2400 bps modem, and a Konexx Acoustic Coupler. The Konexx...

Yes they did, as per VileR's link, but note that that's not what I was on about above. The Commodore 1084 I mentioned was at best semi-compatible...

If you use an acoustic coupler, you won't need a modem too. Mind you, the audio quality on many mobile networks is atrocious and iffy, so between...

yeah, I was eyeballing the lofi stuff. I have a 256k conventional RAM card here in this unit; I was wondering about designing up a combo 2M EMS +...

That's good. Give me a bit to think about this one--many of these things have been built with exactly this firmware, so it's got to be something...

It looks like a standard 2 MB expansion card. I can't read the chips so it might have a different capacity but 256 kbit chips would have been the...