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Votes Activity Newest Views Added
45
votes
4
answers
35k
views

Commodore 64 to modern TV

commodore-64 video
Jul 11 '18 at 14:03 Uwe Keim 129
44
votes
2
answers
11k
views

How did the Z80 instruction set differ from the 8080?

z80 8080 instruction-set
Jul 11 '17 at 23:15 George Phillips 6,570
33
votes
6
answers
3k
views

How did Elite (BBC Micro) compress resources?

software bbc-micro
Feb 24 at 13:34 therobyouknow 561
28
votes
1
answer
2k
views

How does the command.com shell work with MS-DOS?

ms-dos shell
Apr 18 '19 at 9:51 Stephen Kitt 79.6k
27
votes
10
answers
16k
views

How to get started writing C for the IBM PC in 1980-81

ibm-pc compilers c
Jul 11 '17 at 16:29 wizzwizz4♦ 16.2k
22
votes
2
answers
2k
views

Which is the minimum set of interrupts/functions I should implement in a replacement BIOS for a home made IBM PC class computer?

ibm-pc bios
Jun 19 at 12:00 Raffzahn 133k
20
votes
3
answers
3k
views

Bit one of the Intel 8080's Flags register

8080
Sep 17 '19 at 10:48 Community♦ 1
17
votes
1
answer
2k
views

Which undocumented 8085 instructions is Steven Morse referring to in “In The Beginning”?

intel instruction-set 8085
Oct 16 '19 at 8:51 TonyM 1,295
16
votes
2
answers
6k
views

How and why did the ZX Spectrum use so many voltages?

zx-spectrum power
Feb 5 '17 at 12:53 tofro 23.4k
15
votes
2
answers
673
views

What is known about the internal workings of the Z80?

z80 reverse-engineering
Jun 19 at 20:47 Raffzahn 133k
15
votes
2
answers
2k
views

How are 6502 and 65C02 JMP(abs) processed internally

6502
Oct 16 '18 at 21:49 Polluks 323
14
votes
4
answers
3k
views

Why do the i8080 I/O instructions take a byte-sized operand to determine the port?

8080
Jun 24 '19 at 12:13 Raffzahn 133k
12
votes
3
answers
2k
views

What's a good way to implement this “fade” effect on C64

commodore-64 graphics programming
Sep 12 '18 at 8:09 OmarL 29.2k
12
votes
1
answer
3k
views

What is this unused memory range in the Game Boy's memory map?

nintendo memory-layout game-boy
Jul 27 '16 at 10:24 John Burger 1,229
11
votes
1
answer
1k
views

Understanding C64 Character Memory

commodore-64 text
Jul 11 '19 at 2:50 Community♦ 1
8
votes
4
answers
966
views

Was there any particular reason the 6502's LDX#imm and LDY#imm aren't opcodes A8 and AA?

history 6502
Feb 21 '20 at 16:15 Community♦ 1
5
votes
3
answers
700
views

Can someone explain this algorithm used to compute the auxiliary carry flag?

emulation 8080
Jun 6 '19 at 14:13 lvd 7,407
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