Search found 903 matches

by martyn_hill
Wed Mar 06, 2024 10:34 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 211
Views: 97445

Re: FPGA replacment for the ZX8301 ULA and more

Awesome, Leon! Now, just when can we get our hands on one (or more)? :-) (No pressure intended...) BTW - should a firmware come about in the future, what sort of ICP programmer can one use to reprogram your ULA replacements in the field? I have a Lattice USB programmer that does the FPGA on the Q68 ...
by martyn_hill
Wed Mar 06, 2024 4:40 pm
Forum: Hardware
Topic: what is the difference between a ql microdrive and the spectrum version ?
Replies: 10
Views: 662

Re: what is the difference between a ql microdrive and the spectrum version ?

Hi again techy! Ok, so you want to attach a ZX MDV unit within the nice QL style external drive casing (I think that was originally designed for the vDrive.) Makes sense. The other point that becomes relevant is that the orientation of the MDV expansion bus is reversed between the QL and Interface-1...
by martyn_hill
Tue Mar 05, 2024 10:25 pm
Forum: Hardware
Topic: what is the difference between a ql microdrive and the spectrum version ?
Replies: 10
Views: 662

Re: what is the difference between a ql microdrive and the spectrum version ?

Hi techy! There is in fact very little (substantive) difference indeed. Here are the main points that I can think of: A. The drive electronics of the ZX unit are all incorporated in to the enclosure, with the equivalent of the power circuitry that drives the motor and Erase line on a fixed, but stil...
by martyn_hill
Mon Mar 04, 2024 9:58 pm
Forum: Hardware
Topic: CPLD replacement for ZX8301
Replies: 223
Views: 50102

Re: CPLD replacement for ZX8301

Hi Peter!
Peter wrote: Mon Mar 04, 2024 9:22 pm I hate to say it, but GoldCard and SuperGoldcard rise and fall times are too high for the QL mainboard, causing ringing and crosstalk beyond the TTL thresholds.
I guess you meant '...rise and fall times are too low/fast...' :-)
by martyn_hill
Mon Mar 04, 2024 9:55 pm
Forum: Help for New Users
Topic: Dev_use how to use?
Replies: 12
Views: 640

Re: Dev_use how to use?

Hi Jbizzel! My boot file looks like this - not with xxxx yyyyy zzzzz, but the file sizes. 100 base1=RESPR(xxxxx) : LBYTES FLP1_PTR_GEN,base1 : CALL base1 110 base2=RESPR(yyyyy) : LBYTES FLP1_WMAN,base2 : CALL base2 120 base3=RESPR(zzzzz) : LBYTES FLP1_HOT_REXT,base3 : CALL base3 110 LRESPR FLP1_PTR_...
by martyn_hill
Mon Mar 04, 2024 10:00 am
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 211
Views: 97445

Re: FPGA replacment for the ZX8301 ULA and more

Great work, Leon!
by martyn_hill
Sat Mar 02, 2024 7:12 am
Forum: Help for New Users
Topic: Serial QPC to QL
Replies: 17
Views: 704

Re: Serial QPC to QL

Hi again Jbizzel!
Jbizzel wrote: Fri Mar 01, 2024 8:59 pm Using the copy to CON idea, it seems that it is getting stuck at the buffer.
Which is about line 88 in the original code I was trying to copy
And how many characters would you say those 88 lines represent?
by martyn_hill
Thu Feb 29, 2024 10:26 pm
Forum: QL Emulation
Topic: SMSQmulator v3 and the QLUB Adapter...
Replies: 4
Views: 262

Re: SMSQmulator v3 and the QLUB Adapter...

Hi Daniele! Interesting idea... It would certainly be helpful to potential QLUB users to have more ready access to the driver, rather than searching for it here and having to pull it off the Forum or else Dilwyn's site, but I think it does belong on the 'QL' side rather than part of the Emulator - i...
by martyn_hill
Thu Feb 29, 2024 12:03 pm
Forum: Help for New Users
Topic: Serial QPC to QL
Replies: 17
Views: 704

Re: Serial QPC to QL

Hi Just start with Martin's suggestion below - copy directly with COPY 'ser1hz' to 'con_' on the QL to avoid latency waiting for tokenisation - and get a clearer idea of precisely how many characters arrive successfully before things 'hang' (and the I might suspect your USB to Serial adapter on the ...
by martyn_hill
Thu Feb 29, 2024 11:42 am
Forum: General QL Chat
Topic: Software updates
Replies: 21
Views: 1110

Re: Software updates

Hi Per! Did you notice whether or not the Q68 bootloader detected a 'normal' or 'extended' PS/2 mouse at start-up? (It flashes-by a bit quick...) I find that my extended PS/2 mouse isn't always detected as such intermittently. Probably a timing issue, but not something I usually bother about (I hate...