Atari 1040STF: Difference between revisions
Rewrite and cite: the US$999 bundle was the MONO SM124 and US$1,199 the colour SC1224 (page had them reversed); no -12 V from the internal PSU; RAM is 32x256kx1; real board numbers C070523/C070789/C103088. Source: Atari 520ST/1040ST FSM (newly hosted) |
Soften an inference about boot ROMs on the 1040 to what the sources actually support |
||
| (One intermediate revision by the same user not shown) | |||
| Line 34: | Line 34: | ||
RAM is '''256 kbit x 1''' DRAM. A 520 has one bank of 16; the 1040 has a second bank of 16, 32 devices in total, mapped as 000800–07FFFF for the low bank and 080000–0FFFFF for the high bank.<ref name="fsm" /> A 1040STF that reports 512 KB has lost bank 1 — Atari's memory controller sizes each bank independently at power-up and simply does not count one that fails.<ref name="ehs" /> | RAM is '''256 kbit x 1''' DRAM. A 520 has one bank of 16; the 1040 has a second bank of 16, 32 devices in total, mapped as 000800–07FFFF for the low bank and 080000–0FFFFF for the high bank.<ref name="fsm" /> A 1040STF that reports 512 KB has lost bank 1 — Atari's memory controller sizes each bank independently at power-up and simply does not count one that fails.<ref name="ehs" /> | ||
The TOS ROMs are six 32k x 8 devices in three address-paired positions: U4/U7 at FC0000, U3/U6 at FD0000 and U2/U5 at FE0000. Early 520STs carried two 8k x 8 boot ROMs instead and loaded TOS from floppy | The TOS ROMs are six 32k x 8 devices in three address-paired positions: U4/U7 at FC0000, U3/U6 at FD0000 and U2/U5 at FE0000. Early 520STs carried two 8k x 8 boot ROMs instead and loaded TOS from floppy.<ref name="fsm" /> The 1040STF went on sale in March 1986 and ROM TOS was the standard fit across the range by then.<ref name="acm1040" /> | ||
== Power supply == | == Power supply == | ||
| Line 72: | Line 72: | ||
<ref name="fsm">Atari Corporation, ''520ST / 1040ST Computer Field Service Manual'', part number CO26118-002 Rev B (3.6), January 1987: section 1 for the 1040STF designation, the case, the internal supply rating, the 2 A fuse and the 4.75–5.25 V adjustment; section 2 "Main Memory" for the 256 kbit x 1 DRAM organisation, the bank map and the ROM positions U2–U7; section 4 for the disassembly screw counts; section 8 for the Atari (Japan) power supply drawing. Hosted here as [[:File:Atari 520ST and 1040ST Computer Field Service Manual.pdf]].</ref> | <ref name="fsm">Atari Corporation, ''520ST / 1040ST Computer Field Service Manual'', part number CO26118-002 Rev B (3.6), January 1987: section 1 for the 1040STF designation, the case, the internal supply rating, the 2 A fuse and the 4.75–5.25 V adjustment; section 2 "Main Memory" for the 256 kbit x 1 DRAM organisation, the bank map and the ROM positions U2–U7; section 4 for the disassembly screw counts; section 8 for the Atari (Japan) power supply drawing. Hosted here as [[:File:Atari 520ST and 1040ST Computer Field Service Manual.pdf]].</ref> | ||
<ref name="ehs">Atari Corporation, ''Engineering Hardware Specification of the Atari ST Computer System'', 7 January 1986, section 2.2, Memory Configuration Register and the per-bank shadow-test sizing algorithm. Hosted here as [[:File:Atari ST Engineering Hardware Specification.pdf]].</ref> | <ref name="ehs">Atari Corporation, ''Engineering Hardware Specification of the Atari ST Computer System'', 7 January 1986, section 2.2, Memory Configuration Register and the per-bank shadow-test sizing algorithm. Hosted here as [[:File:Atari ST Engineering Hardware Specification.pdf]].</ref> | ||
<ref name="acm1040">''Atari 1040ST'', atari-computermuseum.de. Secondary source, used here for the 1040ST<sup>F</sup> first showing on 9 January 1986, retail availability from 1 March 1986, the 1989 end of production, the US$999 / US$1,199 monitor bundle prices and their January 1987 reductions, the "world's first with 1 MB as standard" claim, and the C070523 / C070789 / C103088 board numbers. https://www.atari-computermuseum.de/1040st.htm</ref> | <ref name="acm1040">''Atari 1040ST'', atari-computermuseum.de. Secondary source, used here for the 1040ST<sup>F</sup> first showing on 9 January 1986, retail availability from 1 March 1986, the 1989 end of production, the US$999 / US$1,199 monitor bundle prices and their January 1987 reductions, the "world's first with 1 MB as standard" claim, the point that ROM TOS was standard across the ST range by early 1986, and the C070523 / C070789 / C103088 board numbers. https://www.atari-computermuseum.de/1040st.htm</ref> | ||
</references> | </references> | ||