pagetable @pagetable@mastodon.social

NES and SNES Controllers on a 6502 (like the C64)
https://www.pagetable.com/?p=1365
#commodore #c64 #retrocomputing #nes #snes

The Apollo Guidance Computer [video + slides]
https://www.pagetable.com/?p=1362

Visualizing Commodore 1541 Disk Contents – Part 2: Errors
https://www.pagetable.com/?p=1356
In order to understand the encoding and potential read errors, it is useful to visualize C64/1541 disks sector-by-sector.
#commodore #c64 #retrocomputing

Commodore “Video Supergame 64” Bundle
https://www.pagetable.com/?p=1354
The “Video Supergame 64” is a Commodore 64 bundled with a joystick and three games on a cartridge, sold mainly in Germany in 1988/1989. Here are some pictures.
#commodore #c64 #retrocomputing

Dumping Commodore 64/1541 Disks with Errors
https://www.pagetable.com/?p=1352
Many old Commodore 64/1541 disks have read errors, but this doesn’t mean the data isn’t recoverable – with the right nibtools settings and some cleaning.
#commodore #c64 #retrocomputing

Commodore “Magic Voice” Cartridge for C64
https://www.pagetable.com/?p=1348
“Magic Voice” is an expansion cartridge for the Commodore 64 that can speak 235 predefined words. Here are some pictures.
#commodore #c64 #retrocomputing

Falk Rehwagen, TopDesk and GEOS
https://www.pagetable.com/?p=1344
Here are some of Falk Rehwagen’s thoughts on his involvement with GEOS and TopDesk.
#commodore #c64 #geos #retrocomputing

TopDesk 1.3 GEOS64/128 Original Source
https://www.pagetable.com/?p=1341
Thanks to Falk Rehwagen and Jürgen Heinisch, the original source of the TopDesk file manager for the GEOS operating system of C64/C128 is available.
#commodore #c64 #c128 #geos #retrocomputing

Tynemouth Minstrel ZX80 Clone Kit
https://www.pagetable.com/?p=1337
I have previously shown an unassembled Sinclair ZX81 Kit that could be bought in the early 80s. Today, it is possible to buy a clone of the ZX80 from Tynemouth Software. Here are some pictures.
#sinclair #zx80 #zx81

Converting a Commodore 1541 or 1570 Drive into a 1551
https://www.pagetable.com/?p=1331
The 1551 is the weird outlier of Commodore drives: It is the only drive using the “TCBM” bus. And what’s even weirder? 1541 and 1570 drives converted into 1551s!
#commodore #c64 #plus4 #retrocomputing

More Original Commodore Source Code
https://www.pagetable.com/?p=1333
There have been a few new interesting additions to the Commodore Source Code repository, including: RAMDOS, 1570, 1571CR, 1551 and 1541
#commodore #c64 #c128 #plus4 #retrocomputing

Commodore Peripheral Bus: Part 5: TCBM
https://www.pagetable.com/?p=1324
The C16/C116/Plus4/1551 "TCBM" bus was supposed to be faster but as cheap as the C64 Serial Bus. It wasn't much faster, probably not cheaper, and had lots of design issues.
#commodore #plus4 #retrocomputing

Run CP/M on your C64 – using Emulation!
https://www.pagetable.com/?p=1315
#commodore #c64 #cpm #retrocomputing
The Roßmöller CP/M Emulator for C64 "borrowed" an 8080 emulator for 6502, and the CP/M OS.

C64 CP/M Cartridge
https://www.pagetable.com/?p=1312
The cartridge that makes a C64 a “dual processor” computer: Commodore’s CP/M cartridge for C64 contains a Z80 CPU and comes with version 2.2 of the CP/M operating system. Here are some pictures.
#commodore #c64 #cpm

Commodore Bildschirmtext II Decoder Cartridge
https://www.pagetable.com/?p=1310
#commodore #c64 #bildschirmtext
Here are some pictures of the outside and the inside of a Commodore Bildschirmtext II Decoder Cartridge for the C64 – a 6800-based computer connected to the expansion port!

Sinclair ZX81 Kit
https://www.pagetable.com/?p=1308
#sinclair #zx81
Here are hi-res photos of an unassembled Sinclair ZX81 kit, with German assembly instructions.

Recovering Files from Broken Amiga OFS Disks
https://www.pagetable.com/?p=1300
#commodore #amiga #datarecovery

The Commodore IEEE-488 Cartridge for C64
https://www.pagetable.com/?p=1303
#commodore #c64 #ieee488
C64 disk drives were usually connected through the slow serial bus. This article shows photos of the Commodore “IEEE-488 cartridge”, which made the faster PET drives available for the C64.

Final Cartridge III with GEOS
https://www.pagetable.com/?p=1180
#commodore #c64 #geos
The Final Cartridge III is great: It comes with lots of features, and an impressive, but ultimately useless GUI, because there are practically no applications for it. Let’s replace the FC3 GUI with GEOS!