4 ms·
The 8088 Prefetch Algorithm
- Taniwha 3y agonot mentioned is that some copy protection schemes wrote branches into the code under the prefetch queue so that if you single stepped through it you would hare off into the weeds
- userbinator 3y agoSuch code would also fail randomly unless interrupts are disabled.
- Agingcoder 3y agoDo you have any example ?
- 13of40 3y ago"The PC register on the 8088 points to the next instruction to be fetched - often pointing past the address of the currently executing instruction. In fact, the IP 'register' you may be familiar with is not a real register at all - the value of IP is produced as needed from PC by subtracting the length of the instruction queue from PC." Dashing my childhood worldview against the rocks again, Intel.
- deleted 3y ago[deleted]
- Agingcoder 3y agoRIP :-)
- kens 3y agoI'm hard at work tracing out the 8088 die, so hopefully I can confirm this discussion at the circuitry level before too long.
- z29LiTp5qUC30n 3y agoPlease do the VIC-II chip next