00:00 Introduction 03:00 Overview of upgrades in the machine 03:26 Rapidus 08:52 PokeyMAX 10:27 Adaptus 12:02 VBXE 15:05 SAVO XL 17:30 Ultimate 1MB/SRAM 20:58 What happened to AKI USB? 32:18 Motherboard swap 39:24 How the hours racked up 41:40 What do the upgrades do? 41:48 Sponsor message 42:30 VBXE RGB video 43:00 U1MB setup menu 46:09 Enabling Rapidus 48:25 The 'Let's Emu' ZX Spectrum emulator 51:25 What works at 20MHz and what doesn't 56:07 Hardware 80 column mode 57:03 Conclusion and summary
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00:00 Introduction
00:47 Sponsor messsage
01:30 Power-on test
01:54 Board inspection
03:06 Signs of trouble
04:30 What is the missing signal?
06:10 Repairing the R/W trace
08:08 Removing the OS ROM socket
09:11 Further board inspection
10:06 Repairs under the OS ROM socket
10:39 Another power-on test
11:10 Problems near the DRAMs
11:58 Removing the RAM sockets
14:33 More trace repairs
16:02 Another power-on test
16:47 Conclusion and summary
17:25 Acknowledgements
Soldering and test equipment:
● Hakko FX-951 T12 soldering station: https://uk.farnell.com/hakko/fx951-64/soldering-station-75w-230vac/dp/3367978
● Best BST-863 hot air rework station: https://www.banggood.com/BEST-BST-863-1200W-220V-or-110V-Intelligent-LCD-Touch-Screen-Heat-Air-SMD-Rework-Station-p-1431173.html
● Anesty (Duratool) ZD-915 thru-hole desoldering station: https://cpc.farnell.com/duratool/d00672/desoldering-station-uk-eu-plug/dp/SD01384
● Hanmatek DOS1102 dual-channel oscilloscope: https://www.amazon.co.uk/DOS1102-oscilloscope-Professional-Oscilloscope-Bandwidth/dp/B0833X3RFK
● Amtech NC-559 Tacky Flux: https://store.rossmanngroup.com/index.php/amtech-nc-559-v2-30-cc-16160.html
● Goot Wick Desoldering Braid: https://store.rossmanngroup.com/index.php/ab20-gootwick-1-5.html
● Cynel Sn60Pb38Cu2 Tin/Lead Solder Wire: https://www.tme.eu/gb/details/lc60m2-0.7_1.0/solders-wires/cynel/
● SysCheck v.2.2 by tf_hh: http://www.abbuc.de/component/jshopping/hardware/syc
Equipment and software used for video production:
● Open Broadcaster Studio: https://obsproject.com/
● 2x Logitech Brio webcams: https://www.amazon.co.uk/Logitech-Gaming-Webcam-Streaming-Compatible/dp/B0748NCPN5
● USB AV/s-video capture dongle: https://www.amazon.co.uk/Ex-Pro-Grabber-Editor-capture-Windows/dp/B001HB9C1O
● 135W Photography Studio Softbox Light: https://www.ebay.co.uk/itm/135W-Photography-Studio-Softbox-Continuous-Lighting-Soft-Box-Light-Stand-Kit-Set-/142645098730?hash=item21364f78ea
● Final Cut Pro
● Apple Motion
● 15" mid-2015 Apple Retina MacBook Pro
#atari
#retrocomputing
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https://www.youtube.com/watch?v=_U3Gj-7W0xg
Preliminary test of completely rewritten window manager, running with new interrupt handler which has freed up about 150,000-200,000 machine cycles per second.
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https://www.youtube.com/watch?v=dCYXoGi20v4