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Forum: General Discussions Topic: Dave Jaggar on ARM (and Thumb) |
| BigEd |
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Posted: Mon Apr 03, 2023 9:33 am
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Replies: 0
Views: 20463
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| ... study of the Acorn RISC machine (1990, Masters thesis, 145 page PDF) A History of The ARM Microprocessor | Dave Jaggar | Talks at Google (60mins, YouTube) via stardot where we find discussion of the evolution of various ARM chips and their relative inapplicability to Acorn's desktop market. |
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Forum: General Discussions Topic: Stuck between a hard place and a 16-bit rock. |
| DockLazy |
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Posted: Tue Mar 14, 2023 9:08 am
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Replies: 23
Views: 16015
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| ... to your early posts in this thread ... There is a 16-bit TTL computer that's running a Unix out there: http://www.homebrewcpu.com/ https://www.youtube.com/watch?v=0jRgpTp8pR8 Looks like it's still running and online! -snip- Magic-1 uses the same 64k+64k per process virtual memory as the other ... |
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Forum: General Discussions Topic: Stuck between a hard place and a 16-bit rock. |
| drogon |
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Posted: Mon Mar 13, 2023 9:55 am
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Replies: 23
Views: 16015
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| ... to your early posts in this thread ... There is a 16-bit TTL computer that's running a Unix out there: http://www.homebrewcpu.com/ https://www.youtube.com/watch?v=0jRgpTp8pR8 Looks like it's still running and online! and I have read of someone making a 32-bit RISC-V system in TTL.(Actually ... |
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Forum: General Discussions Topic: Stuck between a hard place and a 16-bit rock. |
| drogon |
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Posted: Thu Mar 09, 2023 6:36 pm
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Replies: 23
Views: 16015
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| ... time showed it to be generally 3-5 times faster than BBC Basic (which supports 4-byte integers) though. As for BASIC needing a TTY... https://www.youtube.com/watch?v=Bg-DcjrJ8g0 That good enough for you? -Gordon |
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Forum: General Discussions Topic: Stuck between a hard place and a 16-bit rock. |
| DockLazy |
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Posted: Tue Mar 07, 2023 6:53 am
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Replies: 23
Views: 16015
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| ... to the programmer. That article brings up some things I forgot about the Alto, like that it is effectively a VM. I have had a video cued on Youtube demoing the Alto for a while. I might watch it tonight to get an idea what it is capable of. The BBC Micro (6502, 32KB RAM) could run a 16-bit ... |
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Forum: Languages and tools Topic: porting BCPL |
| drogon |
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Posted: Sun Feb 19, 2023 7:05 am
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Replies: 23
Views: 4203
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| ... should be left alone. My recent 6502.org post: http://forum.6502.org/viewtopic.php?f=2&t=7500#p98270 Video demo of my system: https://www.youtube.com/watch?v=ZL1VI8ezgYc If I was doing it all over again - I'd not choose the 65816. There are (and where at that time) far better CPUs... Apple ... |
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Forum: Projects Topic: DIP-8: 8-bit TTL computer |
| dip16 |
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Posted: Wed Jan 04, 2023 11:22 pm
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Replies: 17
Views: 8369
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| ... is better than expected and it runs happily at 4 MHz. I built an earlier version on Eurocards - here it is generating a mandelbrot: https://youtube.com/shorts/CFzhd7aeNsY The new version is a single board and features 64K of RAM, 64K of ROM, two serial ports, and three expansion slots (which ... |
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Forum: Projects Topic: 16/32 bit cpu for a late 1976 cpu. |
| Ken KD5ZXG |
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Posted: Fri Sep 30, 2022 7:01 am
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Replies: 74
Views: 29541
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Forum: General Discussions Topic: Cray-1 internals - technology briefs from 1984 |
| BigEd |
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Posted: Thu Jun 16, 2022 6:10 am
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Replies: 1
Views: 5949
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| . Derek Foulk is uploading a series of 1984 VHS training videos to YouTube, addressed at engineers or technicians, describing the Cray 1 series implementation, from logic gates up. All the voltages are negative... and the pullup resistors, one per logic gate, ... |
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Forum: General Discussions Topic: the box for home brew computers |
| oldben |
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Posted: Sat May 21, 2022 9:06 am
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Replies: 3
Views: 6612
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| ... front panel) or the pidp11 (I think people have 3D printed the box for this... is the original kit an injection moulded piece??) https://www.youtube.com/watch?v=llciraSHbRQ Maybe you need to sketch out some possibilities, with dimensions: are you going to have a single board, or stacked boards, ... |
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Forum: General Discussions Topic: the box for home brew computers |
| BigEd |
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Posted: Sat May 21, 2022 6:51 am
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Replies: 3
Views: 6612
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| ... front panel) or the pidp11 (I think people have 3D printed the box for this... is the original kit an injection moulded piece??) https://www.youtube.com/watch?v=llciraSHbRQ Maybe you need to sketch out some possibilities, with dimensions: are you going to have a single board, or stacked boards, ... |
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Forum: Projects Topic: Astorisc : A pipelined Risc-V from scratch ? |
| alrj |
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Posted: Sun Apr 17, 2022 1:31 pm
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Replies: 53
Views: 26185
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| ... a long time already. So... I have this crazy idea to build a Risc-V processor mostly from logic circuits ever since Robert Baruch posted videos on youtube about his LMARV-1 (Learn Me A Risc-V) about four years ago. His project stopped, then got rebooted, then stopped again. There's also Phil Wright's ... |
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Forum: Projects Topic: Omicron - 1 bit minimalistic homebrew CPU/Computer |
| budapest.daydreamer |
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Posted: Thu Mar 24, 2022 5:57 pm
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Replies: 4
Views: 809
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| ... is scanning the keyboard (i.e. the colored switches) constantly. Pushing red/yellow/green switches will turn the respective led on. https://www.youtube.com/watch?v=ovXcqpK4DXQ The second one is a ‘synth’ program. Omicron is doing all the work. Scanning the switches, generating the corresponding ... |
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Forum: General Discussions Topic: Introduce yourself |
| Sheep64 |
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Posted: Tue Mar 22, 2022 1:14 pm
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Replies: 58
Views: 166940
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| ... plasmo to include M/X pin and UART. I further extended it to include analog servo control. This idea is hugely popular and may have spawned three YouTube videos, so far. ⋅ Suggestions for 8080 on 6502 simulation . ⋅ Suggestions for 65C02 on 6501 simulation . Has many suggestions ... |
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Forum: General Discussions Topic: Scamp a 74-series homebrew 16-bit CPU with OS |
| BigEd |
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Posted: Sun Nov 28, 2021 9:36 pm
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Replies: 0
Views: 20966
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| ... and web emulator here https://incoherency.co.uk/scamp/ and tackling the challenges from Advent of Code here https://www.youtube.com/watch?v=UOizI9qi6FU It is a 16-bit CPU. The bus is 16-bit, registers are 16-bit, addresses are 16-bit, and memory contents are 16-bit. The ... |
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