Search found 310 matches

by Bill B
08 May 2021 12:07
Forum: SOFTWARE
Topic: New Game: Minesweeper
Replies: 19
Views: 264

Re: New Game: Minesweeper

If using the latest version of MEMU, try using the -diag-vid-time-check option to check the timings.
by Bill B
06 May 2021 14:07
Forum: SOFTWARE
Topic: New Game: Minesweeper
Replies: 19
Views: 264

Re: New Game: Minesweeper

It depends how you run MEMU.

If you use the -cpm switch then CP/M functionality is emulated and extra high memory is available.

If you load the CP/M boot ROM using -rom4 boot-type07.rom, and have a disk image, then the memory map in MEMU is the same as real hardware.
by Bill B
03 May 2021 13:42
Forum: MEMU
Topic: MEMU on Pico
Replies: 6
Views: 168

Re: MEMU on Pico

No. I have seen that Andy has a new version, but I haven't used it.

For the Pico version, so much has been cut-out, including almost all the diagnostic tools, it probably will not make a difference. I will have to see what as changed as I try and re-integrate the other versions.
by Bill B
03 May 2021 11:27
Forum: MEMU
Topic: MEMU on Pico
Replies: 6
Views: 168

Re: MEMU on Pico

Sound now works. Rather than keep bothering Dave, I have posted the code on GitHub here . At the moment the GitHub code is only for the Pico version, but I intend that it should eventually be able to build all my versions of MEMU. There is a fair amount of work involved in that as I had to hack the ...
by Bill B
25 Apr 2021 21:28
Forum: MEMU
Topic: MEMU on Pico
Replies: 6
Views: 168

Re: MEMU on Pico

I haven't done much testing yet, but in theory it is running about 20% fast (4.8Mhz instead of 4MHz). I have aimed for that so that for games it does as much work in one 60 Hz VGA frame as an original Memotech would to in one 50Hz TV frame. It does mean that the Clock in Memotech Basic will be fast ...
by Bill B
25 Apr 2021 17:10
Forum: MEMU
Topic: MEMU on Pico
Replies: 6
Views: 168

MEMU on Pico

My chronic inability to finish one project before geting distracted by another :roll: Having destroyed my only PS/2 keyboard, I had to purchase another. In order to make the P&P worthwhile I also purchased a few Raspberry Pi Picos. And having got them I had to try one out. The obvious thing to do wa...
by Bill B
11 Apr 2021 18:58
Forum: SOFTWARE
Topic: Question #2: EXEROM and tape loading
Replies: 29
Views: 1441

Re: Question #2: EXEROM and tape loading

Also, although the ROMs are cramped, they also provide a lot of flexibility. I count 12 places in the system variables where it is possible to insert code to modify or extend the behaviour of BASIC.

How many other machines of that era provide that level of flexibility?
by Bill B
08 Apr 2021 18:55
Forum: SOFTWARE
Topic: Question #2: EXEROM and tape loading
Replies: 29
Views: 1441

Re: Question #2: EXEROM and tape loading

Don't know. Probably would not work.

Could use ROM 6 instead, but that would need some extra logic to decode the ROM 6 signal.
by Bill B
08 Apr 2021 16:58
Forum: SOFTWARE
Topic: Question #2: EXEROM and tape loading
Replies: 29
Views: 1441

Re: Question #2: EXEROM and tape loading

One option might be an external ROM 7 which defined some new USER commands, perhaps including improved tape handling. But then if you are adding additional hardware anyway, might as well add CFX-I, -II or Rememorizer. I suppose it might be possible to add some improved tape handling to the CFX ROM. ...
by Bill B
04 Apr 2021 09:03
Forum: GENERAL DISCUSSIONS
Topic: Keyboard layout
Replies: 14
Views: 834

Re: Keyboard layout

If you look at Dave's site here you will find at the bottom of the page a download link for "kbdfixup.zip". This is a small COM program for modifying the keyboard tables. It is intended to add support for the phantom keys used by the PC keyboard interface, however the source code is included, and it...