What was the IBM PC cost saving for using the 8088 vs 8086?
Apr 27, 2017 · The 8088 has an 8-bit data bus whereas the 8086 has a 16-bit data bus, so the 8088 is a 16-bit chip for these purposes. The IBM 5150 uses 64kx1 DRAM chips per its technical reference …
8 bit microcomputers - Do I have to use an 8284 chip with the 8088 ...
Feb 1, 2018 · 10 I recently got the idea to start an 8088 system because I've been really interested in retro computing and the idea of a "breadboard computer" sounds very fun. From what I've read, …
Why is the Intel 8086 CPU called a 16-bit CPU?
Jul 18, 2019 · The 8088 has a 16-bit ALU, but an 8-bit memory bus. Nearly all operations involving registers can be performed on 16-bit values just as fast as with 8-bit values, but operations which …
How much did IBM save by limiting the PC to 4.77 MHz?
Mar 11, 2020 · My understanding is the CPU clock speed on the Intel 8088 in the IBM PC was selected as 4.77 MHz to simplify the design of the system. This despite the 8088 coming in two versions - 5 …
Help porting nasm code down from 386 to 8088 (shifts by more than 1 …
Apr 24, 2023 · 13 I have been writing some small asm COM program using Netwide Assembler (nasm), but am having trouble getting it to run on 8088 emulators like PCjs. I could use some help translating …
BIOS interrupts vs Hardware interrupts - Retrocomputing Stack Exchange
Oct 12, 2020 · The original 8088 only defined exceptions for the first 5 interrupt vectors, for Divide Error, Single Step, NMI, Breakpoint, and Overflow respectively. Interrupts vectors 5 through 31 were …
8088 - How to keep the instruction prefetcher filled up ...
Aug 31, 2018 · Optimizing for the 8088 is different from optimizing for any other processor in the series; for whatever reason, most of what was written about optimizing in that era--even when PC clones …
When 8086 and 8088 actually sample READY to determine if wait states ...
Jul 17, 2022 · When 8086 and 8088 actually sample READY to determine if wait states need to be inserted? Ask Question Asked 3 years, 6 months ago Modified 3 years, 5 months ago
Did the IBM PC use the 8088's NMI line? - Retrocomputing Stack …
Jul 27, 2019 · As I understand it, the Intel 8088 CPU used in the original IBM PC had two interrupt lines: INTR and NMI. INTR was fed from the Intel 8259 Programmable Interrupt Controller, which handled …
Can DOS make use of more than 640 KB of conventional memory on …
Mar 5, 2024 · Related: How to use all memory on an IBM PC with 8086, Who set the 640K limit? — DOS computers with more than 640KiB of conventional memory were a thing in the early days.