No, the clock frequency of it really is 4.77 MHz. I know. I have one, err, two of them (Hush! Don't tell anyone I said that!). At least I didn't pay full price for them (I got them at a "fire" sale.). The motherboard was the same as used in the IBM PC/XT. They didn't come (at least, not factory stock) with an APL interpreter, although I seem to remember that there was an APL program option, which came with a set of keyboard stick-ons, and required the numeric co-processor (8087). The early models only had a single floppy drive, but that was quickly changed to a dual floppy drive model. There never was a hard disk option, although many people wedged a suitable hard disk into one (And, with hard disks of that era, you'd better make sure you had "parked" the heads, before you tried to lug that monster around.). Many also connected an expansion unit, although that wasn't officially supported. Also, the 640K on the motherboard trick wasn't officially supported, but quite a few people did perform the hack to allow it (If I remember correctly, it either required connecting a jumper on the motherboard or changing out one of the address decoding chips.).
For extra points, how many of y'all remember the NEC V-20 processor chip replacement/upgrade?
Why do I suddenly feel so old? :-( Well, at least I didn't mention core memory, or vacuum tube computers. :-(
Register
4.77 Mhz
No, the clock frequency of it really is 4.77 MHz. I know. I have one, err, two of them (Hush! Don't tell anyone I said that!). At least I didn't pay full price for them (I got them at a "fire" sale.). The motherboard was the same as used in the IBM PC/XT. They didn't come (at least, not factory stock) with an APL interpreter, although I seem to remember that there was an APL program option, which came with a set of keyboard stick-ons, and required the numeric co-processor (8087). The early models only had a single floppy drive, but that was quickly changed to a dual floppy drive model. There never was a hard disk option, although many people wedged a suitable hard disk into one (And, with hard disks of that era, you'd better make sure you had "parked" the heads, before you tried to lug that monster around.). Many also connected an expansion unit, although that wasn't officially supported. Also, the 640K on the motherboard trick wasn't officially supported, but quite a few people did perform the hack to allow it (If I remember correctly, it either required connecting a jumper on the motherboard or changing out one of the address decoding chips.).
For extra points, how many of y'all remember the NEC V-20 processor chip replacement/upgrade?
Why do I suddenly feel so old? :-( Well, at least I didn't mention core memory, or vacuum tube computers. :-(
Dave