Search found 1232 matches

by Peter
Fri Jan 22, 2021 12:07 pm
Forum: Software & Programming
Topic: Q68 QoE Ethernet Driver
Replies: 42
Views: 3313

Re: Q68 QoE Ethernet Driver

This was written for the 6850 UART. Still the best I have found as an SMSQ/E-independent example, and by the way many thanks for publishing it! :) It should not be too hard to adapt the low level portions to the Q68. Of course, a direct Q68 SER integration into Minerva would be even better, but tha...
by Peter
Fri Jan 22, 2021 11:35 am
Forum: Hardware
Topic: Raspberry Pi - New Microcontroller
Replies: 17
Views: 923

Re: Raspberry Pi - New Microcontroller

Not mistaken, it took clever tricks, extreme overclocking, and spec violations to get there. ;) Compared to FPGA that seems a pain to implement, and would not be sufficient for Qzero-like resolutions. But still very impressive! At first glance, I don't see where the RP2040 can be bought as a chip, d...
by Peter
Fri Jan 22, 2021 10:17 am
Forum: Hardware
Topic: Raspberry Pi - New Microcontroller
Replies: 17
Views: 923

Re: Raspberry Pi - New Microcontroller

Hi Norman, There is indeed an onboard ADC. It'sbuilt in to the RP2040, has three channels and 12 bit resolution. There's a 4th channel used for the internal temperature sensor. You are right of course. I was looking much too sloppy, and not directly into the data sheet. My apologies. Somewhere I rea...
by Peter
Thu Jan 21, 2021 3:11 pm
Forum: Hardware
Topic: Raspberry Pi - New Microcontroller
Replies: 17
Views: 923

Re: Raspberry Pi - New Microcontroller

NormanDunbar wrote:I think you hardware types might like the Programmable I/O section of the data sheet. Similar to FPGA???

Except having two cores, it's a microcontroller like many others. Peripherals not too exciting, not even ADCs. Can't see any FPGA (or even PLD) like possibilities.
But thanks for the news!
by Peter
Mon Jan 18, 2021 11:53 am
Forum: Hardware
Topic: QLUB Adapter - Initial Release...
Replies: 108
Views: 5798

Re: QLUB Adapter - Initial Release...

BTW - with the MOSFET approach, are you able to leave the cct connected to the Network whilst the adapter is disconnected from the PC host and the other connected stations still communicate OK? In theory not, because the MOSFET's body diode clamps toward 0V when the supply is 0V. Similar issue as Q...
by Peter
Mon Jan 18, 2021 11:26 am
Forum: Software & Programming
Topic: Q68 QoE Ethernet Driver
Replies: 42
Views: 3313

Re: Q68 QoE Ethernet Driver

I was also considering to write a SER driver independent from SMSQ/E, partially based on my experiences with a Qx0 PAR driver long ago. Probably I'd have looked at your own SER driver, which was for a specific UART, if I remember correctly. It is unlikely that I'll have time for that in the coming m...
by Peter
Sun Jan 17, 2021 10:14 am
Forum: QL Emulation
Topic: UQLX with BDI / QL-SD support
Replies: 14
Views: 4602

Re: UQLX with BDI / QL-SD support

Where would I get this Qubide-derived BDI driver to test with? Ive been using the driver in the QLSD starter pack from dilwyn's site. That is the right place. You should also get the sources and the BDI specification there. For native driver development it was acctually quite helpful to have a defi...
by Peter
Sat Jan 16, 2021 11:17 pm
Forum: QL Emulation
Topic: UQLX with BDI / QL-SD support
Replies: 14
Views: 4602

Re: UQLX with BDI / QL-SD support

Thread resurrection, but I guess there will not be an official release of uQLx with this in before my beard reaches my knees. One caveat: the new QL-SD drivers don't support the BDI format anymore, it is all QLWA now. The BDI interface has nothing to do with the filesystem used inside the image. It...
by Peter
Sat Jan 16, 2021 11:07 pm
Forum: Software & Programming
Topic: Q68 QoE Ethernet Driver
Replies: 42
Views: 3313

Re: Q68 QoE Ethernet Driver

I've done a quick peek into the serial controller which uses the L2 interrupt but doesn't set the external interrupt bit in the interrupt register, hence you can't use the external interrupt list but have to modify the L2 interrupt vector to put your own code in front of it to get serial I/O workin...
by Peter
Thu Jan 07, 2021 11:09 pm
Forum: Hardware
Topic: QLUB Adapter - Initial Release...
Replies: 108
Views: 5798

Re: QLUB Adapter - Initial Release...

What equivalent PNP bi-polar high-speed switching transistor is suitable instead of a ZTX-510? I'm a noob looking at datasheets and none of the PNP transistors I can find are quite the same. ZTX-510 seems to be a tricky one to find. It is not necessary to use a bipolar transistor. If I had to desig...