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STD C128DCR 256K SRAM replacement
C128DCR 256K SRAM replacement
License
CERN Open Hardware License
License: CERN Open Hardware License- 0
Update time：
2022-08-10 10:19:30
Creation time：
2022-07-13 14:49:38
Description
Description
Replaces all of onboard C128DCR DRAM memory by 256K SRAM.
Provides /RAMCAS2 and /RAMCAS3 inputs for 256K expansion (MMU expansion by M. Makela) or something akin to +60/+256K for C64 mode.
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| ID | Name | Designator | Footprint | Quantity | BOM_Manufacturer | BOM_Manufacturer Part |
|---|---|---|---|---|---|---|
| 1 | 100nF | C1,C2,C3,C4 | C0805 | 4 | TORCH | CT41G-0805-2X1-50V-0.1μF-M(N) |
| 2 | Header-Male-2.54_1x2 | H1 | HDR-TH_2P-P2.54-V-M-1 | 1 | TE Connectivity | 826629-2 |
| 3 | 10kΩ | R1,R2 | R0603 | 2 | Tyohm | RMC060310K1%N |
| 4 | AS6C2008A-55SINTR | U1 | SOP-32_L20.7-W11.3-P1.27-LS14.1-BL | 1 | Alliance Memory | AS6C2008A-55SINTR |
| 5 | SN74HCT573PWR | U2 | TSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL | 1 | TI | SN74HCT573PWR |
| 6 | 74HCT32D,653 | U3 | SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | 1 | Nexperia | 74HCT32D,653 |
| 7 | SN74HC148DR | U4 | SOIC-16_L9.9-W3.9-P1.27-LS6.0-BL | 1 | TI | SN74HC148DR |
| 8 | TMS4464 (D0-D3, bank0) | U38 | DIP18-2.54-22.8X7.62MM | 1 | Texas | TMS4464 |
| 9 | TMS4464 (D4-D7, bank1) | U41 | DIP18-2.54-22.8X7.62MM | 1 | Texas | TMS4464 |
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