basicii

Super Basic copy from Nyfors Data Science Super Basic

This board also added a dos eprom and some dip switch to turn on and off super basic and dos, but also select bank of the dos eprom. So you can flash the eprom with both ABC-Dos and UFD-Dos with in the same eprom.

74LS42 is a BCD->Decimal decoder used for address glueing in 2k steps.

Bom v2.01

2pcs 100nF disc capacitor, TH
4pcs 2.2kohm resistor, TH
8pcs 1N4148 diode, TH
1pcs IC-Socket 14pin, TH
2pcs IC-Socket 28pin, TH (if you dont will use DOS then its one pcs)
1pcs 74LS42, TH
2pcs 27C64, TH
1pcs 3 way position switch


Bom v2.03

2pcs 100nF disc capacitor, TH
5pcs 2.2kohm resistor, TH
8pcs 1N4148 diode, TH
1pcs IC-Socket 14pin, TH
2pcs IC-Socket 28pin, TH (if you dont will use DOS then its one pcs)
1pcs 74LS42, TH
1pcs 27C64, TH
1pcs 27C128, TH
1pcs 5 position dip switch


For connector please decide angle and mounting option.
Normal connector can be order here
DIN 41612 connectors
https://www.aliexpress.com/item/4000215552439.html?spm=a2g0s.9042311.0.0.595d4c4dohyGUy

Eprom can be ordered from here
https://www.aliexpress.com/item/32967722269.html?spm=a2g0o.productlist.0.0.3452107a80fP0Z&algo_pvid=f23b93d1-85eb-4d74-8fb3-5dfbfabf04ad&algo_exp_id=f23b93d1-85eb-4d74-8fb3-5dfbfabf04ad-2
Memory allocation
16384 0x4000 - 22528 0x5800 Freerom / Super Basic
24576 0x6000 - 28671 0x6FFF DOS / DOS
28672 0x7000 - 30719 0x77FF IEC / IEC