MiSTer FPGA Forum

Chol wrote: ↑Sun Jul 31, 2022 3:33 pm Thanks for your input so far. I had no success with the CBM PC-I, but I got the CBM PC-10 BIOS to boot after padding the file with 32kb of zeros at the beginning:
pcxt-pc10.jpg

So that was half a success. I learned that this is not a good idea at all and will stop further approaches.

Mills wrote: ↑Mon Aug 01, 2022 12:47 pm

Chol wrote: ↑Sun Jul 31, 2022 3:33 pm Thanks for your input so far. I had no success with the CBM PC-I, but I got the CBM PC-10 BIOS to boot after padding the file with 32kb of zeros at the beginning:
pcxt-pc10.jpg

So that was half a success. I learned that this is not a good idea at all and will stop further approaches.

I tried that bios and I inserted the xtide at the first 12kb, it boots and tells me to press f1, then it should start xtide and load the img, But keyboard is not working .

kitune-san wrote: ↑Wed Jul 27, 2022 3:35 pm @spark2k06
Timing constraint violations have been overlooked for a long time.
I have a suggestion to resolve the timing constraint violation.
I have considered two methods. You can choose one or the other.

1. Change the chipset frequency to 50 MHz for the PLL output.
https://github.com/kitune-san/PCXT_MiST ... hz-chipset

2. Insert F/Fs between combination circuits that cause delays. (E.g. before and after the RAM block)
https://github.com/kitune-san/PCXT_MiST ... adjustment

• Missing lines are recovered on the right in CGA

MrMartian wrote: ↑Thu Jul 28, 2022 6:28 pm I will toss my hat in and say I'm working on adding true IDE support compatible with XT-IDE to this. VHDL/Verilog I understand, the MiSTer framework for accessing data I'm still reading through...

dontbugster wrote: ↑Thu Aug 11, 2022 6:59 am Doesn't this provided some interface to it?
https://opencores.org/projects/sdcard_m ... controller

Below is a video of the Area 5150 demo run in this PCXT project for MiSTer:

AmintaMister wrote: ↑Fri Aug 12, 2022 5:10 pm Hi all!

I've tried to automatically mount the serial drive at MiSTer startup with:

Code: Select all

# Startup PC-XT serdrive
[[ -e /media/fat/Scripts/pcxt_uart_hdd.sh ]] && /media/fat/Scripts/pcxt_uart_hdd.sh

in "linux/user-startup.sh" but it doesn't work, why?

#!/bin/bash

kill_all() {
        rm -f /tmp/uartmode*
        rm -f /tmp/ML_BAUD
        rm -f /tmp/PCXT_SERDRIVE
        killall midilink
        killall pppd
        killall agetty
        killall login
        killall mt32d
        killall fluidsynth
        killall mpg123
        killall serdrive
}

conn_speed=115200
[ -f /tmp/UART_SPEED ] && conn_speed=$(cat /tmp/UART_SPEED)
[ -f /tmp/CORENAME ] && core_name=$(cat /tmp/CORENAME)

if [ "$core_name" = "PCXT" ]; then
        kill_all
        sleep 1
        echo "1" >/tmp/PCXT_SERDRIVE
        taskset 1 /media/fat/games/PCXT/serdrive -c 1 -b 460.8Kb /media/fat/games/PCXT/hdd.img &
        exit 0
fi

echo "ttyS1: "$conn_speed

• Fix READY signals, by @kitune-san
• Memory map selection according to video mode

AmintaMister wrote: ↑Fri Aug 12, 2022 5:10 pm Hi all!

I've tried to automatically mount the serial drive at MiSTer startup with:

Code: Select all

# Startup PC-XT serdrive
[[ -e /media/fat/Scripts/pcxt_uart_hdd.sh ]] && /media/fat/Scripts/pcxt_uart_hdd.sh

in "linux/user-startup.sh" but it doesn't work, why?

[PCXT]

uart_baudrate=460800   ; 115200, 230400 or 460800
uart_hdd_cyl=62
uart_hdd_sect=63
uart_hdd_head=16

Malor wrote: ↑Sat Aug 13, 2022 1:02 pm If I understood sorgelig correctly, he won't accept this core until the IDE controller works. He seemed pretty horrified by the serdrive idea.

spark2k06 wrote: ↑Sat Aug 13, 2022 1:53 pm

Malor wrote: ↑Sat Aug 13, 2022 1:02 pm If I understood sorgelig correctly, he won't accept this core until the IDE controller works. He seemed pretty horrified by the serdrive idea.

Well integrated in the Main, except that it will take up a bit more than usual, I don't see what the drawback could be, the serdrive would only be active when the core running... for other cores, it wouldn't have any repercussions.

It is clear that the ideal is real IDE, but as long as we don't have it (it seems easy to implement, but it is not), it is the best we have at the moment.

dmckean wrote: ↑Sat Aug 13, 2022 2:03 pm Have you looked into his suggestion of trying to integrate the floppy drive from the Atari ST into this core?

spark2k06 wrote: ↑Sat Aug 13, 2022 2:07 pm

dmckean wrote: ↑Sat Aug 13, 2022 2:03 pm Have you looked into his suggestion of trying to integrate the floppy drive from the Atari ST into this core?

I have already looked at several projects, yes, that one too. They're all proving to be a real challenge for me, unfortunately... one day we'll have some integrated, for sure, but at least for the moment they're proving to be unattainable for me.