`store` and `load` implemented, using #JupiterAce code, as it is more robust than ZX-Forth original. This means you cannot load screens from #ZX81, though you could load screens into Ace Forth (if you can think of a use for that). With that done, I can now start coding! #minstrel4th #retrogaming
November 10, 2025 at 7:40 PM
`store` and `load` implemented, using #JupiterAce code, as it is more robust than ZX-Forth original. This means you cannot load screens from #ZX81, though you could load screens into Ace Forth (if you can think of a use for that). With that done, I can now start coding! #minstrel4th #retrogaming
January 18, 2025 at 8:19 PM
Ultimate 8-bit maze game, now also available for #JupiterAce and #Minstrel4th. github.com/markgbeckett...
October 3, 2025 at 9:42 PM
Ultimate 8-bit maze game, now also available for #JupiterAce and #Minstrel4th. github.com/markgbeckett...
No, but does PET version show footprints of where Rex has been (which was coded in Malcolm Evan's #zx81 original) but never visible to the player? #retrogaming #Minstrel4th
April 25, 2025 at 6:53 PM
No, but does PET version show footprints of where Rex has been (which was coded in Malcolm Evan's #zx81 original) but never visible to the player? #retrogaming #Minstrel4th
I made a spreadsheet to convert frequencies into AY register values for different clock frequencies, as part of porting #ZXSpectrum PLAY to #JupiterAce/#Minstrel4th, if that helps. github.com/markgbeckett...
jupiter_ace/rc2014_sound_card at master · markgbeckett/jupiter_ace
Software I have developed for the Jupiter Ace and Minstrel 4th - markgbeckett/jupiter_ace
github.com
May 16, 2025 at 6:42 AM
I made a spreadsheet to convert frequencies into AY register values for different clock frequencies, as part of porting #ZXSpectrum PLAY to #JupiterAce/#Minstrel4th, if that helps. github.com/markgbeckett...
#gameplay of #JupiterAce Snakez++ on the #Minstrel4th with the #Joystick module. #Minstrel #Minstrel4D #RC2014
gldm.itch.io/jupiter-ace-...
gldm.itch.io/jupiter-ace-...
Gameplay on my Minstrel 4th (with joystick)
Since my Minstrel 4th has been greatly improved with the Joystick Module , here is the gameplay of Snakez++, played on the real hardware: the pure power of the z80 at your disposal! My wife playing...
gldm.itch.io
January 20, 2025 at 8:35 AM
#gameplay of #JupiterAce Snakez++ on the #Minstrel4th with the #Joystick module. #Minstrel #Minstrel4D #RC2014
gldm.itch.io/jupiter-ace-...
gldm.itch.io/jupiter-ace-...
Also, if you run on a @tynemouthsw.bsky.social #Minstrel4th/ #Minstrel4D and have an #RC2014 Digital I/O card, you get an Alien-style proximity sensor!
December 20, 2024 at 8:33 AM
Also, if you run on a @tynemouthsw.bsky.social #Minstrel4th/ #Minstrel4D and have an #RC2014 Digital I/O card, you get an Alien-style proximity sensor!
I have updated it to run on @tynemouthsw.bsky.social #Minstrel4th, adding joystick support and porting Soundbox support to RC2014 sound card. github.com/markgbeckett... #retrogaming
November 24, 2024 at 9:20 PM
I have updated it to run on @tynemouthsw.bsky.social #Minstrel4th, adding joystick support and porting Soundbox support to RC2014 sound card. github.com/markgbeckett... #retrogaming
The end of development for my game #JupiterAce Tetriz #Minstrel4 #Minstrel4th #Minstrel4D #retro #z80 #8bit #8-bit
gldm.itch.io/tetriz/devlo...
gldm.itch.io/tetriz/devlo...
End of development
so here we are, the development of Jupiter Ace Tetriz is done. I have tested the Joystick-supporting version, I've played long enough to come up with a (undocumented) toggle for the music ;-). Both ke...
gldm.itch.io
February 7, 2025 at 8:36 AM
The end of development for my game #JupiterAce Tetriz #Minstrel4 #Minstrel4th #Minstrel4D #retro #z80 #8bit #8-bit
gldm.itch.io/tetriz/devlo...
gldm.itch.io/tetriz/devlo...
#minstrel4th version has a few bonus features, including support for a #Rex ranger finder and built-in map, showing #Rex's path.
May 4, 2025 at 2:53 PM
#minstrel4th version has a few bonus features, including support for a #Rex ranger finder and built-in map, showing #Rex's path.
new devlog post about my tetris version for #JupiterAce #Minstrel4th #minstrel4d #developer #retro #z80 #8bit https://gldm.itch.io/tetriz/devlog/881103/polishing-my-tetriz
Polishing my Tetriz
I have finally made some improvement in my tetriz game; here's the changelog: The most obvious change is the music during the gameplay... now I wonder if it could be annoying... The most challenging i...
gldm.itch.io
February 4, 2025 at 4:18 PM
new devlog post about my tetris version for #JupiterAce #Minstrel4th #minstrel4d #developer #retro #z80 #8bit https://gldm.itch.io/tetriz/devlog/881103/polishing-my-tetriz
This is my (currently hacked) port of ZX-Forth to #Minstrel4th / #JupiterAce. Not having to serve display means it is very fast. It can find primes in first 500 integers in less than a second! #retrogaming
November 1, 2025 at 9:59 PM
This is my (currently hacked) port of ZX-Forth to #Minstrel4th / #JupiterAce. Not having to serve display means it is very fast. It can find primes in first 500 integers in less than a second! #retrogaming
#Minstrel4th has a very nice built-in Ace Forth, so why bother? Well, Tree Forth supports sophisticated multitasking, which could lead to some interesting projects.
November 2, 2025 at 8:21 PM
#Minstrel4th has a very nice built-in Ace Forth, so why bother? Well, Tree Forth supports sophisticated multitasking, which could lead to some interesting projects.
The joystick module card by @tynemouthsw.bsky.social for my #Minstrel4th has arrived! #RC2014 #JupiterAce
January 15, 2025 at 9:10 AM
The joystick module card by @tynemouthsw.bsky.social for my #Minstrel4th has arrived! #RC2014 #JupiterAce
The second #forth game for today is 4D Monster Maze, a port of Malcolm Evan's classic maze game to @tynemouthsoftware.co.uk #Minstrel4th. For purists, there is a 100% Forth version, though display routine defaults to using m/code to make game more responsive. #retrogaming
May 4, 2025 at 2:48 PM
The second #forth game for today is 4D Monster Maze, a port of Malcolm Evan's classic maze game to @tynemouthsoftware.co.uk #Minstrel4th. For purists, there is a 100% Forth version, though display routine defaults to using m/code to make game more responsive. #retrogaming
new devlog post about my tetris version for #jupiterAce #minstrel4th #minstrel4D #developer #retro #z80 #8bit
gldm.itch.io/tetriz/devlo...
gldm.itch.io/tetriz/devlo...
Polishing my Tetriz
I have finally made some improvement in my tetriz game; here's the changelog: The most obvious change is the music during the gameplay... now I wonder if it could be annoying... The most challenging i...
gldm.itch.io
February 4, 2025 at 3:27 PM
new devlog post about my tetris version for #jupiterAce #minstrel4th #minstrel4D #developer #retro #z80 #8bit
gldm.itch.io/tetriz/devlo...
gldm.itch.io/tetriz/devlo...
#gameplay of #JupiterAce Snakez++ on the #Minstrel4th with the #joystick module. #rc2014 #minstrel #minstrel4d
https://gldm.itch.io/jupiter-ace-snakez/devlog/871235/gameplay-on-my-minstrel-4th-with-joystick
https://gldm.itch.io/jupiter-ace-snakez/devlog/871235/gameplay-on-my-minstrel-4th-with-joystick
Gameplay on my Minstrel 4th (with joystick)
Since my Minstrel 4th has been greatly improved with the Joystick Module , here is the gameplay of Snakez++, played on the real hardware: the pure power of the z80 at your disposal! My wife playing...
gldm.itch.io
January 20, 2025 at 8:36 AM
#gameplay of #JupiterAce Snakez++ on the #Minstrel4th with the #joystick module. #rc2014 #minstrel #minstrel4d
https://gldm.itch.io/jupiter-ace-snakez/devlog/871235/gameplay-on-my-minstrel-4th-with-joystick
https://gldm.itch.io/jupiter-ace-snakez/devlog/871235/gameplay-on-my-minstrel-4th-with-joystick
I have ported Tree Forth/ ZX-Forth from #zx81 to #JupiterAce/ #Minstrel4th. With no display generation to worry about, #Forth runs amazingly well on Minstrel 4th. It can find all primes in first 500 integers, using Sieve of Eratosthene, in well under a second. #RETROGAMING github.com/markgbeckett...
November 2, 2025 at 8:14 PM
I have ported Tree Forth/ ZX-Forth from #zx81 to #JupiterAce/ #Minstrel4th. With no display generation to worry about, #Forth runs amazingly well on Minstrel 4th. It can find all primes in first 500 integers, using Sieve of Eratosthene, in well under a second. #RETROGAMING github.com/markgbeckett...
Been enjoying a game of Psion's Perilous Swamp for #ZX81 on my #Minstrel4th. Plays very nicely with enhanced display capabilities of Minstrel, though I still can't save the princess!
May 25, 2025 at 5:03 PM
Been enjoying a game of Psion's Perilous Swamp for #ZX81 on my #Minstrel4th. Plays very nicely with enhanced display capabilities of Minstrel, though I still can't save the princess!
The end of development for my game #JupiterAce Tetriz #minstrel4 #Minstrel4th #minstrel4d #retro #z80 #8bit #8-bit
https://gldm.itch.io/tetriz/devlog/882764/end-of-development
https://gldm.itch.io/tetriz/devlog/882764/end-of-development
End of development
so here we are, the development of Jupiter Ace Tetriz is done. I have tested the Joystick-supporting version, I've played long enough to come up with a (undocumented) toggle for the music ;-). Both ke...
gldm.itch.io
February 7, 2025 at 8:40 AM
The end of development for my game #JupiterAce Tetriz #minstrel4 #Minstrel4th #minstrel4d #retro #z80 #8bit #8-bit
https://gldm.itch.io/tetriz/devlog/882764/end-of-development
https://gldm.itch.io/tetriz/devlog/882764/end-of-development
Steven Vickers also provided an implementation of common #forth word `.S` for inspecting the parameter stack (Jupiter Ace, Forth Programming, p. 143). This is one of the tools included in extended Forth ROM that ships with #Minstrel4th.
May 5, 2025 at 12:20 PM
Steven Vickers also provided an implementation of common #forth word `.S` for inspecting the parameter stack (Jupiter Ace, Forth Programming, p. 143). This is one of the tools included in extended Forth ROM that ships with #Minstrel4th.
Next you will want one of these - z80kits.com/shop/ym2149-..., which allows you to enjoy the Boldfield Soundbox on your #Minstrel4th/ #Minstrel4D. Some notes on how to do this and software at github.com/markgbeckett..., plus I've patched #JupiterAce games Valkyr and Centipede. #retrogaming
YM2149 Sound Card 8 bit chip tunes for retro computers! - Z80 Kits
YM AY Sound Card adds 8 Bit chip tunes to any RC2014 model. Use AY-3-8910 or YM2149 sound chip and program in BASIC, or play PT3 chip tunes
z80kits.com
January 15, 2025 at 12:14 PM
Next you will want one of these - z80kits.com/shop/ym2149-..., which allows you to enjoy the Boldfield Soundbox on your #Minstrel4th/ #Minstrel4D. Some notes on how to do this and software at github.com/markgbeckett..., plus I've patched #JupiterAce games Valkyr and Centipede. #retrogaming
And if you'd like to experience what it was like to use and program the MPF-1, you can run the MPF-1 ROM on the @tynemouthsw.bsky.social #Minstrel4th using this revised ROM that I have created, including the printer and EPROM programmer add-ons - github.com/markgbeckett...
jupiter_ace/mpf-i at master · markgbeckett/jupiter_ace
Software I have developed for the Jupiter Ace and Minstrel 4th - markgbeckett/jupiter_ace
github.com
February 20, 2025 at 8:32 PM
And if you'd like to experience what it was like to use and program the MPF-1, you can run the MPF-1 ROM on the @tynemouthsw.bsky.social #Minstrel4th using this revised ROM that I have created, including the printer and EPROM programmer add-ons - github.com/markgbeckett...
I have written a Forth implementation for the #JupiterAce/ #Minstrel4th, based on integer-arithmetic version on Rosetta Code website. I hoped it would be much faster than #ZX81 version, but sadly it is not. Anyone have ideas for improving it? github.com/markgbeckett... #retrogaming #mandelbrot
June 22, 2025 at 4:35 PM
I have written a Forth implementation for the #JupiterAce/ #Minstrel4th, based on integer-arithmetic version on Rosetta Code website. I hoped it would be much faster than #ZX81 version, but sadly it is not. Anyone have ideas for improving it? github.com/markgbeckett... #retrogaming #mandelbrot
June 19, 2025 at 9:28 PM