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Cactus

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13 posts edited
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17 Questions

Votes Activity Newest Views
4
25
votes
2
answers
3k
views

Details of video memory access arbitration in Space Invaders

memory 8080 arcade
Jul 26 '19 at 7:27 cjs 17.2k
6
22
votes
9
answers
5k
views

Intel 8080-based home computers

8080 8-bit-microcomputers
Feb 25 '20 at 7:04 Community♦ 1
2
18
votes
2
answers
983
views

Comprehensive test suites for MOS 6520 PIA / 6522 VIA / 6526 CIA

mos-6520 mos-6522 mos-6526 testing
Jan 7 '18 at 18:46 Tommy 27.5k
 
17
votes
3
answers
908
views

Commercial C64 software implemented in Forth?

commodore-64 forth
Jul 25 at 11:29 Empty Stack 1
1
15
votes
2
answers
906
views

What is this code on the zero page that was put there by the BASIC ROM?

commodore-pet 6502 memory-layout firmware
Dec 1 '18 at 8:00 Cactus 2,100
1
11
votes
3
answers
4k
views

Visible resolution of C64 video output, including borders

commodore-64 video
Feb 9 '19 at 20:13 Community♦ 1
1
11
votes
1
answer
832
views

How are held-down keys handled in CHIP-8?

keyboards chip-8
Dec 7 '16 at 17:58 bjb 12.2k
1
7
votes
1
answer
219
views

Player 1 / Player 2 input for Space Invaders

hardware arcade input-devices
Dec 27 at 19:41 Peter Duniho 280
1
6
votes
1
answer
255
views

Reconstructing uncompressed program from compressed tape image

commodore-64 emulation compression tape-image
Sep 22 at 18:37 Brian H 45.6k
1
4
votes
3
answers
337
views

What is this Intel Hexadecimal-like file format in this Tiny BASIC dump?

file-format identify-this-software dump
Nov 15 at 15:48 user3840170 3,401
1
4
votes
2
answers
677
views

Transforming a memory dump into something loadable

commodore-64 memory-layout
Sep 23 at 19:25 Retrograde 2,997
1
4
votes
1
answer
105
views

Are there any CHIP-8 games that break if `SAVE` / `RESTORE` *doesn't* change the pointer register?

emulation software instruction-set chip-8
Jun 27 at 20:24 tobiasvl 1,369
 
4
votes
2
answers
817
views

Open source, non-GPL SID emulator

commodore-64 emulation licensing mos-6581
Jul 20 '18 at 18:05 scruss 13.2k
 
3
votes
1
answer
149
views

`DRAW` instruction timing

emulation video chip-8 rca-1802
Jul 24 at 15:39 supercat 18.7k
 
3
votes
3
answers
509
views

Effective speed of original COSMAC VIP CHIP-8 interpreter

emulation chip-8 rca-1802
Jul 20 at 2:03 Bruce Abbott 3,655
 
2
votes
1
answer
126
views

READY / WAIT when reading from / writing to IO ports

8080 io
Sep 23 at 18:31 Raffzahn 123k
 
2
votes
1
answer
147
views

Peripherals needed to run Tiny BASIC interactively on an Intel 8080

hardware basic 8080
Sep 10 at 15:10 Martin Maly 4,436
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