Search found 617 matches

by tcat
Fri Mar 27, 2020 3:23 pm
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi, Thank you. I will probably go with $C0000 address decode, as I do not have wired A17 line, so it may be easier, also this way I could use up to half of the EEPROM capacity 256K. In the glue logic, I drive both RAM /OE and /CS with GAL's /RAMCE pin. CPU R/W is connected directly to RAM /WE. I am ...
by tcat
Thu Mar 26, 2020 8:16 am
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi, Thanks for all the input, digesting (1 of 100% complete). I am also thinking of `venturing' something simple of my own, me capable of. Looking back at `Simple RAM' these are GAL equations, I pulled together with the help in the forum here. GAL16V8 Glue logic for 512x8 SRAM Sinclair QL RAM Expans...
by tcat
Wed Mar 25, 2020 8:17 am
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi, Some statistics on versions I use on my QL. 16K TKII 16K PTR_GEN 12K HOT_REXT 12K WMAN 40K qpac2 8.0K ramprt 4.0K SERMouse 108K total Provided QPAC is or can be made romable easily. This may fit $E0000-$FFFFF which is 128K. I was hoping to use either eeprom AM29F010 (128K, 8x16K sectors) or AM29...
by tcat
Mon Mar 23, 2020 5:04 pm
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi,

I see, now to avoid internal expansion port, what other option we could have. A daughter board piggy backing over ROM chips?

Tomas
by tcat
Mon Mar 23, 2020 4:27 pm
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi, EDIT Looking at ROM extension port, it provides some [all] address, data lines, and ROMOE. romport.png It would be nice to see the extended environment on standard QL system, so I was hoping to put, TKII, PE, QPAC, RAMPRT and SerMouse on the flash EEPROM, but I am not quite sure if they are all ...
by tcat
Mon Mar 23, 2020 10:51 am
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

Re: QL Add-on ROM

Hi, The map I took from `The QL Technical guide', I thought a definitive reference at least for older QL ROMs, prior Minerva and SMSQ. I was curious what sort of ROMs were available back in the days, compared to what we can do today, e.g. QuibIDE. I was thinking of using some flash EEPROM, and map i...
by tcat
Mon Mar 23, 2020 9:24 am
Forum: Hardware
Topic: QL Add-on ROM
Replies: 34
Views: 2084

QL Add-on ROM

Hi,

Seeing QL h/w memory map, I wonder how to make use of the add-on rom address space $fffff-$e0000, on a real machine?

memory.png
QL memory map
memory.png (48.16 KiB) Viewed 618 times

Tomas
by tcat
Mon Mar 23, 2020 7:59 am
Forum: QL Emulation
Topic: SMSQmulator v2.28
Replies: 4
Views: 491

Re: SMSQmulator v2.28

Hi, Thanks for the input. I was curious about `SMQmulator' I have never tried, it has nice features, reading manual now. I was surprised how it handles files, compared to `uQLX' (which is defacto QLAY for Linux) pi@raspberrypi:~ $ ls ~/mdv2 GRAPH_BIN draw_bas line_bas poly_bas sexec_bas MDUTILS_BIN ...
by tcat
Sun Mar 22, 2020 4:39 pm
Forum: QL Emulation
Topic: SMSQmulator v2.28
Replies: 4
Views: 491

SMSQmulator v2.28

Hi, Just trying SMQmulator, though I just need QDOS 1.2 JS-ROM only, this comes with SMSQ/E system by default. These are my settings. # Directory name for NFA1_ drive NFA1 = /home/pi/mdv1/ NFA2 = /home/pi/mdv2/ NFA_USE = MDV # Change case of files on NFA devices (0: no change 1:upper case 2:lower ca...
by tcat
Wed Mar 11, 2020 8:08 am
Forum: Software & Programming
Topic: ZX81 BASIC
Replies: 26
Views: 1706

Re: ZX81 BASIC

My plan is to convert the BASIC I have to ZX81 BASIC as a fun project. My questions are more on how to convert old-school cassette software into text software. I cannot tell about ZX81 tape files. But for ZX Speccy taps, these utilities can be used. zmakebas - convert text files into ZX Spectrum Ba...